Note: This story was dynamically reformatted for online reading convenience.
 
 Title: It's Nice to Be Included


Summary: Younger sister already knew about her siblings' relationship. 


Keywords:inc,fic,erotic,young,sex





   How do you tell your older brother and sister you know they're having
sex?  There was no good way that I could think of.  In many ways it just
seemed better to keep it a secret, and for a while that's what I did.

   That was until one day when I was headed to my room and accidentally
overheard my mother and sister in the middle of a heated argument.  I
didn't think of myself as particularly nosy most of the time, but I
couldn't help stopping to listen.  Because we were sisters, my room was
right next to Monica's and that made it easy enough to duck out of sight if
I thought I might be caught eavesdropping.

   Very quickly I caught the gist of the issue which was mom had found out
that Monica had been having sex in the house.  I didn't know how she'd
found that out and I wasn't sure I wanted to.  I was hoping it wasn't
anything more than an improperly disposed box of condoms or something.

   Whatever it had been, mom would of course not realize the true situation
and would assume that my sister had been sneaking some unknown boy into her
room.  Not an unfair assumption, given that it was exactly what my first
guess had been too.

   Given that our rooms were right next to each other, and that my bed was
directly against our shared wall, my first clue about Monica's secret had
been the sounds I heard late at night while I supposed to be asleep.  Since
the real situation hadn't even occurred to me, I too assumed she had a
boyfriend over that she didn't want anyone to know about for whatever
reason.  Unlike mom, I didn't mind all that much and didn't think it was
any of my business.  It had taken me several weeks to figure out what was
actually going on, and then only because I happened to go to the bathroom
at just the right time to catch my brother David entering her room on my
way back.

   Most of the time I wouldn't have interfered in such a dispute, but in
this case I knew Monica didn't have a way out since she couldn't very well
explain who she was seeing and mom wasn't going to give up on that point
easily.  It would be better for everyone if the subject was dropped as far
as I was concerned.

   A little nervously I walked over to the doorway of my sister's bedroom.
Both her and mom fell silent immediately as they caught sight of me, not
that I expected any different.  I may have been eighteen, but to my mother
I was still her baby and it wouldn't have surprised me if she hoped I still
didn't know what sex was.  There was no way she was going to keep up an
argument about it with me present.

   I played up my best 'I don't want to interrupt' act, fidgeting with my
hands and bouncing slightly from foot to foot as I broke the silence.

   "Um, I just...  I mean I can come back, but I have a biology assignment
due tomorrow and Monica said she'd help me with it," I said.

   I didn't have any such assignment of course, nor would Monica know
anything about it, but she picked up on what I was doing right away.  She
said absolutely nothing and just looked at mom with a similar expectant
expression to my own.

   Mom caved easily as I knew she would.  She was a sucker for us getting
our schoolwork done and it was usually a good excuse for getting out of
something more unpleasant, though with my siblings now in university it
didn't always work as well for them anymore.  They were expected to be more
responsible for their own studies.

   "Oh, okay sweetie," mom said, still somewhat off-balance from my
interruption.  "I won't keep you two from it then, it's good to see you
working together like that.  But," she warned, pointing a finger at Monica,
"don't think we aren't going to continue this conversation."

   "Yes mom," Monica said, not quite defiantly enough to get in trouble.

   My sister followed me out of her room and into mine where she flopped
down on my bed and waited until I closed the door.

   "Thanks, I owe you," she said.

   "No problem.  I thought it was better for everyone if she didn't keep
interrogating you."

   "Enh, I could have handled it.  Though I'm thinking she would have
started really getting pissed at me soon, so good timing on your part."

   "Yeah.  It would have been hard getting her to calm down when you
couldn't tell her what she wanted to know."

   Monica gave me a funny look, like I'd said something confusing.  I tried
to ignore it as I climbed onto my bed too and sat with my back against the
wall.

   "So I take it you overheard a lot of that," she ventured.

   "Enough of it."

   "Well I hope you're less nosy and aren't going to ask who it was," she
said, trying to make it a joke and not really succeeding.

   "Nah, I already know anyway."

   My heart started beating noticeably harder as I spoke.  Somehow I'd
stumbled onto probably the best opportunity I was going to get to tell
Monica I knew about her and David.  I was nervous as hell about it though.

   My sister looked surprised for a second, then broke into an uneasy
smile.

   "Listen, whoever you think it is, it isn't.  Can we just leave it at
that?"

   Part of me wanted to just accept that and maintain the status quo, but a
bigger part of me didn't want to leave it there.  I was still scared of her
reaction though and I pulled my knees up to my chest as though it would
help protect me somehow.

   "Mon, I know okay?  You don't have to...  I mean it's not really my
business, but I wanted you to know.  Just please don't try to argue with me
on this, I'm not stupid."

   Rather than surprised this time, Monica looked absolutely stunned and
completely unsure how to handle what I was telling her.

   "I know you're not stupid," she said slowly.  "You don't need to worry
about that.  But could you maybe just tell me who it is so we're both
definitely on the same page."

   "It's David," I said, nodding my head in the general direction of his
room so there was no confusion which David I meant.

   "Fuck," she said, letting out a long sigh.  It was more a statement of
resignation than anything else.  "How'd you figure that out?  He didn't...
no, he wouldn't have told you...."

   I shook my head.  "You're right, he didn't.  But we are kind of right
next door." I tapped a knuckle on the wall that separated our rooms to
illustrate my point.

   "Shit, sorry.  I didn't think you'd hear us.  I really didn't. 
Though... I know we get louder than we should sometimes."

   "It's okay.  A lot of the time I don't even notice."

   That wasn't quite a lie, but it was close.  If I didn't hear them in a
given night, it was usually because there was nothing to hear.  For some
reason I'd found myself staying awake to listen on a not-infrequent basis
ever since I became aware of what was happening.  It was strangely
disappointing when I got nothing but some mild sleep-deprivation out of it.

   "It's safer to meet in David's room," Monica said, as if she could read
my mind.  "We probably should have gone there every time, except he gets
impatient waiting for me to join him sometimes.  What can you do?" She
shrugged.  "Anyway, we'll be more careful about that from now on, I'll make
sure of it."

   "You don't have to," I said a little too quickly.  "I...  it doesn't
bother me is all," I finished almost at a mumble.

   Monica looked at me suspiciously for a moment, then slid back on the bed
to sit right beside me.  I couldn't quite bring myself to meet her gaze.

   "Why do I feel like there's something else you want to tell me?" she
asked.

   I shrugged as if I didn't know what she meant, but not convincingly
enough.

   "You don't have to worry about it," she said.  "You know my biggest
secret already, there's nothing you could tell me that you'd need to be
scared about."

   I still refused to speak and cursed myself mentally for getting stuck in
this situation.  I'd wanted to tell Monica that I knew about her and David,
and I didn't regret that, but there were other things I didn't want her to
know.

   When I remained silent long enough that Monica decided I wasn't going to
say anything, she laid a hand on my shoulder reassuringly and leaned in
closer to my ear.

   "Do you sometimes listen to us on purpose?" she asked almost at a
whisper.  "Is that what you aren't telling me?"

   I hesitated, then nodded.  I was embarrassed that she had guessed, but
at the same time at least that meant she wouldn't think it was too weird.

   "And you like hearing us?" she prompted.

   Again I nodded.  There was nothing the least bit upset in the tone of
her voice, yet I couldn't help feeling a wave of guilt pass over me.  I
held my knees a little tighter and did my best not to tremble.  I wasn't
fooling anyone.

   "Aw baby, it's okay," Monica said.  She hugged me and stroked my hair
gently, trying to get me to relax.  "You think I'd get mad at you over
something like that?  It's not like I haven't been doing worse."

   "I know, but...  I shouldn't be thinking some of the things that I do."

   "You're only thinking them," she reminded me.  "I'm actually doing
things I shouldn't do.  I assume you think about what me and David are
doing?"

   "Yes," I said reluctantly.

   "And it gets you excited?"

   "...  yes," I said even more reluctantly.

   "Well that's not all that surprising given that you're our sister is it?
I mean, we're siblings and everything.  We're not all that different in a
lot of ways."

   "I didn't realize it was a genetic thing," I said with a touch of
sarcasm.

   I actually was starting to feel better, Monica's comforting seemed to be
working.  It was hard to feel bad when she was holding me.

   "I don't know that it's that, but it definitely could be.  Or something
about how we were raised.  Hard to say, no one ever talks about it.  No one
ever admits to it anyway.  Makes it really hard to figure how common
fucking your sibling is." I giggled a little at that and Monica released
me, presumably having decided I'd be okay.  "And seriously, it is nice that
we won't have to hide it from you anymore."

   "Good, that's what I wanted.  We're going to tell David too right?"

   "Yep.  You can if you want or I will.  Or even better we could have some
fun with him first."

   "What exactly does that mean?"

   My growing comfort with the situation was thrown off by the sudden twist
Monica had thrown in.  Telling David seemed like the right idea, but I
didn't know what she had planned as far as 'having some fun'.

   "Oh I just mean it'd be kinda fun to see his reaction if we let him
catch us doing something naughty," Monica said.  "Nothing too extreme or
anything.  It was just a thought though, no pressure.  I need to remember
you aren't as used to all this as I am."

   "Oh, okay," I said with relief.  "Yeah we probably better not.  He might
just think it's weird if we did something like that."

   "You kidding?  Why would you think that?"

   "Um, 'cause I'm just his little sister and he probably doesn't think the
same about me as he does about you."

   "No, not yet.  That's only because he hasn't had the chance to.  You're
my little sister too you know, and I promise you you're totally cute enough
for him."

   "Yeah see?  Cute.  Not 'hot' or 'sexy', I'm just not-"

   "I didn't mean it like that," Monica interrupted, waving her hand
dismissively.  "I didn't mean it in a 'you're cute, but' kind of way.  I
mean it in more of a 'he'd totally be in to you' way."

   "You can't know that."

   "Sure I can.  David and me have very similar tastes."

   "I...  what?"

   Despite my confusion, on some level I still understood what she had
said. Mostly I just couldn't believe she'd actually said it.

   "You are sexy you know," Monica said as she tenderly brushed my hair
away from my face.  "But you've just got such an innocent look too.  You
know, the one that keeps fooling mom even after all these years."

   Her hand never left my face and I wasn't nearly as surprised as I should
have been when she leaned in to kiss me.  It wasn't a very long kiss, or
very forceful.  It might even have been considered perfectly normal between
sisters who'd been close growing up.  But for us, it meant more than that.

   "Maybe it is the sibling factor," Monica said, "who knows really." Then
she grinned ruefully.  "And I promise I won't do that again if you don't
want me to.  I just needed to make my point."

   If nothing else, she had indeed made her point.  It had been my first
time being kissed by another girl and, honestly, it was hardly unpleasant.

   "It wouldn't bother me if you did it again," I said, trying and failing
hard to seem casual about it.  "If you wanted to."

   "Mm-hm, I think I might want to.  As long as it doesn't bother you."

   She kissed me again, for real this time.  Much like when she'd hugged me
there was something comforting about the experience, something that just
made it feel good and not the least bit scary.  Any remaining nervousness I
might have had was taken away by the sheer love that my older sister
managed to project.  I could truly believe that she would protect me from
anything bad that might happen as a result of what we were doing, silly as
that thought was.

   I followed Monica's lead unquestioningly when she guided me to lie down
on my back more or less in the middle of the bed.  Her hands roamed over my
body, mostly staying in fairly innocent places like my arms or hips or
belly, but I wouldn't have stopped her then if she decided to be more
adventurous.

   It was only when she paused for breath and gave me a moment to think
that I suddenly panicked a little.  I was letting things move to fast,
before I'd had time to process.  My sister's reassuring face smiling down
at me and helped to calm me down again before I freaked out, but it had
been enough to make me realize we needed to hold off for a bit.

   "Mon?" I said.

   "Yeah baby?"

   "Could we maybe...  stop for now?  Is that alright?"

   "Of course.  I told you I wasn't going to do anything you didn't want me
to."

   "It's not that I don't want to," I said quickly.

   "No, I know.  I get it." She climbed off me and sat down cross-legged.
"But I want you to remember you can say no to anything, anytime and I won't
get mad, okay?"

   "Okay.  Thank you."

   Monica glanced toward the door, then back to me.

   "It wouldn't be a bad idea for you to get out some homework or something
soon anyway, assuming you have some," she said.  "In case mom checks up on
us."

   I had completely forgotten our earlier ruse and the reason my sister was
in my room in the first place.  I blushed slightly at letting it slip my
mind and dragged my backpack over to the bed, removing some books from it
and spreading them out on the mattress.  With Monica supposedly helping me
it made more sense for us to work there than try to have us both sit at the
small desk in the corner of my room.  Particularly when neither of us had
yet gone out to get a second chair.  It would have been too much of a
giveaway that we hadn't been working.

   I really did have some work that I needed to do, though Monica wasn't
much help with it.  While I lay on my stomach with my books in front of me,
she took the opportunity mainly to tease me.  She started out playing with
my hair for a bit, then switched to running a finger up and down my back.
Just enough to make sure I couldn't ignore her.

   Luckily she didn't get any farther than that, because if she had it
might have been a desperate struggle to look busy when we heard mom outside
the door.  As it was Monica had plenty of time to remove her hand from my
back before the door opened.

   "How's it going girls?" mom asked as she popped her head in.

   "Pretty good," Monica answered for me.  I noted that she had cleverly
failed mention how much longer we'd be.

   "Okay.  Just checking to see if you needed anything."

   That wasn't entirely true, I knew better than that.  Certainly if we
asked for a snack or something she'd probably bring us one, but it had
mostly been to make sure we were doing what we said we would be.

   "I think we're fine for now," Monica answered again.

   "Alright then.  Let me know when you're finished."

   "Yes mom," Monica and I chorused together.

   It was a good move on mom's part making sure we couldn't sneak away to
something else without risking getting caught.  It would have been easy
enough for Monica to retreat to her room quietly without chancing mom
trying to restart their argument, but now that would just lead to more
trouble.

   "Oh well, guess I'm stuck here for a while," Monica said once we were
alone again.

   I rolled my eyes.  "Yeah, I'm sure you're really broken up over that. 
'Cause you're just going to sit there and behave and you'll be bored to
tears right?"

   "Okay, so maybe I can find something to amuse myself," she conceded
easily.  "You are kind of a fun new toy for me."

   I blushed a little and tried to hide it by getting back to my work. 
Monica ignored my reaction completely and started rubbing my back, softly
at first but gradually building up until I couldn't ignore her anymore. 
When her hand went under my shirt I gave up my pretense of being focused
and rested my head on my arms.

   "What'sa matter?  Done already?" Monica asked.

   "Sure, why not."

   I was really getting to like all the attention, not to mention getting a
proper back rub without even asking for it.  Whether my sister's motivation
had been to try and distract me, or just to see what she could get away
with I didn't much care.  It just felt nice.

   "So I know we haven't decided on what to do with our brother," Monica
said eventually, "but how 'bout we leave it at least until tomorrow, okay?"

   "'Kay," I mumbled, only half-listening.

   "Good, I think it'll be fun."

   ****

   The next morning felt somehow dream-like, like it wasn't quite real.  I
knew everything from the day before had actually happened, but I still got
the vague, unshakable impression that I'd imagined it all.  On the other
hand I wasn't sure what I expected to change, because there was no reason
anything should have.  For mom and David everything truly was business as
usual as far as they were concerned.  Monica acted completely normal too,
but then she'd been acting completely normal for a while now.  She had
practice.

   I was the only one going through the motions and hoping no one would
notice that something was off.  It reminded me a bit of when I'd first
figured out what Monica and David were up to and I'd been so sure someone
would immediately suspect that I knew.  It was an even less rational fear
this time though since, at worst, Monica might have told David the news
instead of waiting like she said she would.  That wasn't anything to get
more than mildly annoyed about.

   It was only after sitting at the breakfast table for several minutes of
no one treating me any differently that I managed to convince myself I had
nothing to worry about.  All I was feeling was probably little more than
left over nerves from what had happened between me and my sister.  I had
pretty much officially made out with her after all, and if anything in my
life was worth a certain amount of concern, that was it.  Rather than
analyzing it though I tried to keep up with conversation, partly to
distract myself and partly because it meant a smaller chance of getting
caught off-guard if someone asked me a question while I was day-dreaming.

   Mom was the first to leave the table to go to work, and only a couple
minutes later Monica rose as well.

   "Alright, I need to get going," she said.  She stopped beside me and put
a hand on my shoulder.  "I'll pick you up after school?"

   I got the feeling it wasn't as much of a question as she made it sound.

   "Um, okay I'll meet you when I'm done then," I answered.

   "Great.  See ya later."

   She squeezed my shoulder gently and tousled David's hair as she walked
past him on her way out.  He ignored her gesture except to straighten his
hair back out as soon as she left the room.  It could have been a perfectly
normal sister bugging her brother if you didn't know any better.

   That left me alone with David.  I probably should have just left well
enough alone, but for some reason I couldn't stop myself wanting to make
use of the opportunity to see what I could get out of him.  If Monica truly
hadn't said anything to him, which she most likely hadn't, then it was a
wasted effort.  At the same time, it wasn't like I had anything better to
do.

   "How come you aren't going in with Monica?" I asked.  "Don't you usually
travel together?"

   He shrugged.  "She told me she had to pick you up after school and my
last class ends like half an hour too late."

   "That's too bad.  You might get lonely without her," I said, taking a
second attempt at getting a reaction.

   "I think I'll manage somehow," he replied in a perfect deadpan.

   He finished eating and left the room before I got a chance to say
anything else.  My failure irked me slightly, despite it being what I
expected, and I actually started looking forward to whatever Monica had
planned for later.  If nothing else, I was sure it would get a reaction out
of David.  My older sister was better at that sort of thing than I was.

   ****

   Just like she said she would be, Monica was there to pick me up at the
end of my school day.  She was even early and was already waiting for me
when I made it to the parking lot.

   "Hey little sis," she greeted me.  "Ready for some fun?"

   "Ready as I can be," I said.

   "Oh don't worry, it won't be anything unpleasant.  I swear, you seem to
think I'm going to murder you or something."

   "Well I didn't until now."

   Monica giggled happily as she started driving us home.  She was
certainly in a good mood, almost bouncy, and that could end up being either
good or bad for me.  I wasn't sure which yet.

   The whole way home I kept expecting her to tell me what the plan was. 
She seemed so excited that I didn't think she'd be able to keep quiet, but
she did.  When we made it home I finally gave in and asked.

   "So what are we going to do?"

   Monica just smiled enigmatically at me, but as I suspected she really
did want to tell me and she broke down moments later.

   "We're going to paint our toenails," she said.

   Whatever I might have imagined, that was not it.  I stared at her in
disbelief, but she ignored me and hummed cheerfully to herself as we made
our way inside.

   "Okay, I get it," I said.  "You've gone insane right?  This whole thing
where I thought you had everything figured out, it's only because you
literally don't understand reality anymore.  Am I close?"

   Monica burst into another fit of giggling before regaining some control.

   "No, seriously though," she said.  "'Cept it's gonna be a little
different from normal.  That's why we needed to get here before David.  We
need some time to get our outfits picked out."

   "Outfits...  for painting our nails."

   "Right."

   "My theory is still looking pretty good you know."

   "Oh give it a chance.  It's not as crazy as you're making it out to be."

   I gave my sister the benefit of the doubt and followed her to my room.
She immediately started rummaging through my clothes drawers while I
watched with a bemused interest.

   "So I'm thinking this'll be more fun if we match," she said.  "Black's
probably the easiest colour shirt to go with, I know I've got one that will
work."

   She held up a black t-shirt from my shirt drawer for my approval.

   "Uh, okay.  Whatever," I said, unable to muster the same enthusiasm over
the choice since I had no idea why it even mattered.

   I took the shirt from Monica and she went back to her search.

   "Then we're gonna need panties.  That's a little trickier but let's just
see what you've got."

   "They need to match too?" I asked, suddenly getting a glimpse of where
this was going.

   "Well, like I said, I think it's better if they do.  It'll have more of
an effect," she explained.  "Ooh, how 'bout these red ones?  I've got a
pair pretty close to them."

   She showed me a pair of red panties, one of the pairs I owned that I
thought of as a bit sexier than my everyday underwear.  I was a bit
hesitant, but took them from her as well.

   "Alright, put those on and I'll go get changed too," Monica instructed.

   "Okay, but what am I supposed to wear with them?  Like pants or a skirt
or what?"

   The grin my sister gave me was very nearly what I'd call evil.

   "That's it," she said.  "It's up to you if you wear a bra I suppose, but
I'm not going to."

   "Wait, no, what?  I can't do that."

   "Sure you can.  I'll be right there wearing the same thing, it'll be
fine.  But," she said, briefly turning serious, "if you really don't want
to, then we won't.  It is still up to you."

   As soon as she gave me the choice my protests died away.  It wasn't that
I didn't want to do it necessarily, the more I thought about it the more I
decided she might be right about it being fun, but I still wasn't entirely
convinced.  I wasn't the one used to David seeing me naked after all.

   "You're gonna look hot you know," Monica encouraged me.  "You definitely
don't need to worry about that.  Between the two of us we might just be
able to break our brother.  He won't be ready for it." She leaned closer.
"I promise if you do this then I'll do something special for you later."

   I shivered a little at the thought.  Maybe I couldn't be sure that David
would be at all interested in me, but I knew for certain what my sister's
intentions were toward me.  I'd been remembering the feeling of her kissing
me off and on all day and had been secretly hoping she'd do it again.

   "Okay," I said just barely loud enough so Monica could hear.

   "Awesome!  Alright, get to it we're running out of time."

   She dashed off to her room while I slowly undressed and put on my
'outfit'.  I spent a few minutes examining myself in my mirror afterward,
trying to decide if I really did look hot.  I passed on a bra as Monica
suggested, and though my boobs weren't quite as big as hers, my t-shirt was
tight enough that you'd have to be blind to miss them.  My panties didn't
cover enough of my butt for me to be comfortable wearing them with nothing
else below the waist, but for the purposes of looking sexy I supposed they
were doing a pretty good job.

   When Monica returned she seemed to approve of my look just as I expected
she would.  She was indeed wearing more or less the same as I was and we
actually matched better than I thought we would.  She made me stay in front
of the mirror where I already was while she threw my hair in a quick
ponytail, which I belatedly noticed she had done to herself already.

   "There, we're like twins now," she said, moving to stand beside me.

   "If you say so."

   We weren't quite that identical, not with my sister having both a
half-inch on me and a slightly fuller figure in general, but we might have
passed a casual inspection if we had to.

   "Close enough anyway," she said.  "Now come on, let's get started."

   We made a small detour so Monica could grab some nail polish, then went
straight out onto the back deck.  It was a nice day so I didn't really mind
being outside, except I felt kind of exposed even though no one would be
able to see us without coming in the driveway.  I was directed by my sister
to sit in a deck chair directly across from her, and quickly had one of her
feet placed in my lap.

   "Now you paint my nails," she instructed.  "Slowly, we're not in a hurry
here.  If David takes too long getting home we'll probably need to take a
break so we don't finish too soon.  It's better if it looks like we've
started already though."

   "And what is this accomplishing exactly?" I asked, even as I chose a
colour for her.

   "It's mostly just a pretext for not wearing pants," she admitted. 
"Don't want to accidentally get out pant legs dirty do we?"

   I rolled my eyes.  "He's not gonna buy that."

   "Sure he will.  Enough for our purposes anyway.  It's not like he's
going to want to question it."

   Whatever doubts I still had, by now I was committed.  If only because my
chance for backing out without looking like a wuss had passed.  There was
always the possibility that David wouldn't even come straight home and I
wouldn't have to deal with that eventuality, but part of me just wanted to
get it over with.

   As it turned out I had almost finished with Monica's first foot when the
sound of a car pulling in announced David's arrival.  I turned just enough
to make sure it was him and was promptly scolded and told not to look like
I cared who it was.

   "Hey," Monica called as soon as our brother had exited his car.  "Come
up on the deck here for a minute."

   David might have come this way anyway rather than going to the front
door if he had seen us, but if he chose not to it would have ruined the
whole 'plan', such as it was.

   "Hey girls, what you up to?" he called back, sounding like he was
heading toward us.

   "Just doing our nails," Monica replied.

   "That's why I couldn't get a drive with you today?" David asked,
amusement heavy in his voice.  "You guys needed to-"

   He abruptly cut himself off and I could only assume it was because he'd
finally gotten close enough to see what we were wearing.  Monica did a
brilliant job of acting like there was absolutely nothing unusual going on,
whereas I felt like I'd give it away instantly if he saw my expression. 
With my back to him I still had a moment or two to try and put on a decent
poker face.

   "What?" Monica asked when David didn't continue.  "Why are you looking
so stunned?"

   "No reason," he said after a slight hesitation.  "But why are both
half-naked?"

   "Duh, to keep our pants clean."

   It could have been the stupidest question in the world the way my sister
reacted.

   "You couldn't have just rolled up the legs a bit?" David persisted.

   "Does it matter?" Monica said.  "Not like there's anyone around to care
'cept maybe you.  You don't mind do you?"

   "No.  Whatever.  Just didn't expect it," he mumbled.

   "Good.  You can come join us for a bit then.  We can do your nails too
if you want."

   David declined on the offer, but he did pull over another chair and sat
beside us.  I was almost done on Monica's other foot, but with my brother
now in my line of sight I was suddenly having a much more difficult time
focusing on what I was doing.  My gaze kept flicking up toward him to see
where he was looking.  He seemed to mostly be trying to surreptitiously
check out Monica's lower half without me noticing, but sometimes he also
seemed to be checking me out.  I didn't know if that made it better or
worse.

   Finally I finished my sister's last toe and she raised her foot slightly
to examine it.

   "Perfect," she announced.  "Now give me one of yours."

   I sheepishly leaned back in my chair and gave her my right foot.  I felt
more on display now, though it was hard to gauge David's reaction since he
now knew I wasn't distracted and would be more likely to catch him watching
me, or even Monica.

   "Here, make yourself useful and hold this for me," Monica said, handing
a bottle of nail polish to David.

   He scooted closer and did as requested, holding the bottle for her. 
That just seemed silly to me since it would only make it harder for her,
but he apparently didn't realize that.  It didn't take me long to figure
out that in his new position David was now naturally looking almost
directly at me and Monica obviously planned it that way.

   Though neither of us would openly admit it, I was pretty sure both David
and I were kind of embarrassed at the situation and didn't want the other
to know.  My brother tried to pretend like he was indifferent toward my
semi-nudity, and I tried to pretend like I didn't see his eyes constantly
shifting to my panties, then jerking away.  Embarrassed or not though, I
could tell the difference between a guy who was weirded out by his little
sister doing something strange and a guy who didn't want his interest to be
noticed.  This was definitely a case of the latter.

   Monica threw the occasional discreet wink or secretive smile my way when
she was sure David wouldn't catch it.  Partly it was probably to signify
that she too had noted the success of her plan, but also I suspected
because she was just enjoying the view as well.

   The combined attention of my two siblings was getting to me and, despite
my silent protests, my body reacted to it.  Like it or not, I was getting
horny.  It wasn't an uncontrollable wave of desire or anything, but it was
enough to make me hope desperately that it wouldn't get too much worse and
become noticeable.  As much as I didn't think I was actually getting
soaking wet, I didn't trust my panties to be able to absorb very much
without showing it.  I was in an odd situation of being increasingly
terrified that a wet spot might appear at any moment, and certain that if
one did it'd just result in a vicious cycle of turning me on even more
since I'd be attracting more attention.

   I breathed a small sigh of relief when Monica finally switched feet,
since having my left leg up blocked my crotch at least slightly.  That
small reprieve lasted only until I saw the corner of her mouth twitch
upward when our eyes met briefly.  She wasn't going to leave things well
enough alone.

   "So what do you think David?" Monica asked.

   He jumped a little, as if startled out of his thoughts.

   "About what?"

   "About our toes obviously.  What else would I be talking about?"

   He gave her a dirty look, apparently having caught on that he knew her
question hadn't been as innocent as that.

   "They look good," he said.

   "Good," Monica replied like she was satisfied by the answer.

   I knew better though, and since unlike David I was in position to look
for it I could practically see her waiting until he was off-guard again.

   "As long as we're on the subject of looking good though," she began,
playing the question as little more than an afterthought, "what do you
think of this look for us?"

   "Are we talking about your nails still?" David asked, sounding resigned
to getting a response he didn't want to hear.

   "No.  I'm talking about, like, the bare legs mainly.  I mean, you should
feel these," Monica said as she ran a hand along the length of my leg that
she could reach.  "I thought mine were smooth but our baby sister just has
the softest skin ever.  And she looks so adorable like this.  I almost want
to take her to bed and hug her like a big teddy bear all night."

   Without being able to see it, I could sense my face reddening.  David
was definitely going to know something was up now if he didn't already.

   "I'll pass," he said in response to Monica's offer of feeling my legs.
He also wouldn't look at me at all now.

   "You sure?  I just saw you looking and assumed you were thinking the
same thing I was."

   At that point I nearly said something, but David beat me to.

   "I just remembered I've got something I need to do," he said, rising
abruptly and quickly entering the house.

   Monica and I both watched him go, then I whirled back on my sister.

   "Dammit Monica," I hissed.

   "What?  I'd say we were pretty successful."

   "Yeah maybe, but you just made it weird at the end.  What's he gonna
think now?"

   She gave me an extremely smug, not mention annoying, smirk.

   "I think you saw that bulge in his pants when he stood just as well as I
did.  He liked what he saw, and that was you.  We can proceed however we
want from here."

   I wished I had a counter for that, but I'd seen the same thing Monica
did.  And even if I hadn't, there was no denying the reaction I'd been
picking up from him the whole time he'd been sitting with us.

   "Still didn't have to be so obvious about it," I mumbled.

   "I was just teasing.  That was the whole point after all.  Or part of
the point." She stood up and stretched, purposefully showing off her body
to me.  "I take it you're not too mad at me to let me keep my promise."

   "Promise?" I said blankly.

   "I said I'd do something special for you," she prodded.

   "Oh, right.  What's that exactly?"

   "I think you can guess."

   I had a pretty good idea what she was getting at, except for the
specifics.  The thing was, if I refused her at this point I was just going
to end up locking myself in my room and masturbating anyway.  The only
reason not to go with Monica was the lingering doubts I had as to whether
that was really what I wanted.  It was hard to hold on to those when I
already had an idea how good she could make me feel though.

   I allowed her to take my hand and lead me to her bedroom.  As soon as
she had the door closed behind us she was on me, kissing me and reaching
around to grab my butt.  I was overwhelmed by her enthusiasm and could do
little more than return her kiss as best I could and take an occasional
step back as her constant pushing forward threatened to knock me over.

   All at once I ran out of room and ran into Monica's bed, tripping on it
and landing on the mattress with a small bounce.  I giggled like a maniac
at my own fall, releasing some of my anticipatory tension while my sister
just smiled and shook her head at my foolishness.

   "What am I going to do with you?" she said.

   "I dunno," I said.  "I thought you knew."

   "I suppose I do.  I know what I want to do anyway."

   She knelt down beside the bed, right by my legs where they dangled over
the edge.  My knees were pried apart about as far as they would comfortably
go, allowing Monica a close look at my panties.

   "You're not going to need much work to get excited are you?" she said.
"I don't think there's much more I can do."

   I didn't dare look to see if she actually could tell how turned on I was
or if she was just guessing based on my behaviour.  I had to briefly close
my legs partway as she slowly pulled my panties down and off, leaving my
pussy naked and eagerly awaiting some attention.

   "Ooh, I was right," Monica said.  "You're so wet already."

   The sudden touch of her fingers on my pussy was like a small electric
shock and I arched my back in pleasure at the sensation.  Very soon Monica
had to actually forcibly restrict my movements with her free arm as I
wriggled involuntarily under her treatment.  I couldn't help it, I needed
release and the idea that it was going to come from my older sister was
just so new and exciting.

   "Hold still baby, I'll take care of you quick okay," Monica said.

   "Can't help it," I said.

   "I know, just try."

   I did my best to keep still, and was rewarded not only with increased
activity from Monica's fingers, but also from her tongue flicking over the
top of my pussy and just barely brushing my clit.  My sister was no
beginner to sex with another girl, I became sure of that within only a few
moments.  When she kissed me that could translate easily enough from
kissing a guy, but the skill she showed at getting me off had to come from
some other experience.  It might simply have been messing around with one
of her friends at some point, I'd heard of that sort of thing happening but
had never felt the urge to try it myself.  Now I kind of regretted not
giving it a chance.

   "Oh god," I moaned, pressing Monica's head against my crotch with one
hand.

   She gently pulled my hand away, though didn't stop licking or fingering
me with her free hand as she did.  I took the hint and kept my hands to
myself after that.  If she wanted to be in control that was fine by me, as
long as she kept doing what she was doing.

   Monica easily got two fingers inside me, I doubted I put up much
resistance to the intrusion, and as soon as she did I had the additional
sensation of being finger-fucked to contend with.  She could easily have me
cumming in hardly any time at all with the combined assault she inflicted
on me, and that seemed to be exactly her goal.  Her movements only
intensified until her tongue barely left my clit and her hand hit my pussy
roughly with every thrust of her fingers.  There was no way she could keep
up that pace for long, but fortunately she didn't have to.

   When I masturbated, I always had plenty or warning before I came and
could stretch it out indefinitely if I wanted to.  With my sister doing the
work instead, I had almost no warning.  There were only a brief few seconds
between sensing my approaching orgasm and it hitting, not nearly enough
time to stop it even if I had any reason to want to.

   I came hard on my sister's talented tongue and fingers, and it took all
the concentration I had left to make sure I stayed relatively quiet
throughout.  Not silent, that was out of the question, but hopefully not
loud enough to alert anyone outside the room.

   I felt Monica leave her position as my orgasm ended, but I was too busy
staring stupidly at the ceiling to look down at her.  She audibly moved to
the other side of the room for a minute, then came back and stopped long
enough to kiss me gently.

   "Hope you liked that as much as I think you did," she said.  "I'm gonna
go check on David, okay?"

   "'Kay."

   I would have preferred her to stick around a little while with me, at
least until I felt like moving again, but I also didn't feel like making an
issue of it.  She hadn't put on any more clothing and I was pretty
confident I knew what she was going to be doing once she got to David's
room.  In some ways that was good because the last thing I wanted was to
change their relationship.  Monica might be having fun with me, but there
was no doubt in my mind that there was something deeper between my siblings
than there was between us.  Maybe that would change, maybe it wouldn't.  I
was content to wait and see what happened.

   Eventually I forced myself to move and stood up to examine Monica's
room. My panties lay discarded and unloved on the floor, but I ignored them
for the moment.  I shouldn't have snooped, usually we all were pretty good
about leaving each other's stuff alone, but I couldn't help myself.  In
hindsight there was no reason to think I'd find anything naughty in the
room after my sister so recently got caught by mom, but I still had held
some initial hope I might figure out what had given her away.  In the end I
found nothing at all incriminating.

   I picked up my panties before leaving and discovered there was indeed a
wet spot visible on the front, though not an embarrassingly large one as
I'd been afraid of.  If I'd been a little more daring I might have skipped
putting them back on to make my way back to my room, but I'd had more than
enough excitement for the time being.  Plus my underwear was only damp
enough to be slightly uncomfortable.

   As I was closing Monica's door behind me I paused as I heard a sound
from down the hall.  It came from David's room and I suspected I knew what
kind of sound it had been, but again I couldn't restrain my curiosity as
much as I should have.  I snuck down to right outside his door and I could
indeed make out the occasional soft moan from inside, as well as a few
infrequent and less distinct noises.  There was no question left in my mind
what they were up to.

   Suspicion thus confirmed I left my siblings to their fun and went back
to my room for real.  I made sure to lock the door behind me before
stripping off my panties and collapsing on my bed.  For several minutes I
did little more than go over recent events in my head.  Despite having cum
so recently, my thoughts were sexually charged enough that my hand strayed
down to my pussy.  Alone with my renewed horniness and no outside pressure
to be doing anything else, I allowed my imagination to run wild and lazily
fingered myself to another orgasm.

   ****

   The next day was Saturday, and the perfect time for a weekend as far as
I was concerned.  Never mind that I would have been okay with most any day
being a weekend.

   I slept in as usual, and only got out of bed when the sun got too
annoying to ignore.  Sometimes I wished my room was on the other side of
the house, sometimes I thought smaller and just wished I could remember to
close my curtains before I went to sleep.  That would probably work just as
well for my purposes.

   The house turned out to be deserted by the time I made it downstairs. 
It didn't matter to me too much one way or the other, but because my
Saturday mornings often still involved cereal and cartoons it meant that at
least I'd avoid any teasing.  No one ever seemed to agree with my belief
that there was nothing wrong with some mindless, childish fun for a few
hours once a week.

   I curled up on the couch in the living room in my tank top and pyjama
pants, clutching my bowl of cheerios and settled in.  I giggled
unselfconsciously at animated characters doing silly things for about
almost an hour before I was interrupted by the sounds of someone returning
from wherever they had been.  I repressed a small sigh and put a lid on the
giggling, but didn't turn off the show I was watching.

   David's footsteps were the most recognizable of anyone in the house,
heavier by far than mom's or Monica's, and those were the ones I heard.  He
would have been able to locate me too from the sound of the tv, so I felt
no need to make my presence known.  He'd come see me if he wanted to.

   A couple minutes later he did come check on me, walking up behind the
couch and leaning over the back of it.  He considerately waited for a
commercial break to speak.

   "Hey, how's it going?" he said.

   "Pretty good."

   "Good.  Uh, can I talk to you about something?"

   He seemed serious enough that I was pretty sure I knew what the subject
might be.

   "Okay," I said, just a little bit nervous all of a sudden.

   "Alright, well...."

   David faltered almost immediately as he tried to say whatever it was he
wanted to say, leaving me even more convinced as to what it was about.  He
sighed and walked around to sit on the couch with me.

   "Look, I know you and Mon were up to something yesterday," he said. 
"And...  I sort of know what's up, but Monica's being particularly stubborn
about telling me things.  I'd just like us to be on the same page here."

   "What do you want to know?" I asked in a quiet voice.

   "Well, short version is I saw what you and Monica were doing in her room
after teasing me out on the deck, and partly I just need to know where
that's coming from."

   So I hadn't been the only one snooping, though David probably hadn't
meant to.  He would have just been looking for Monica and found both of us
instead.  I wasn't all that surprised that I had missed that, and I
wouldn't have been surprised either if our sister had neglected to mention
the intrusion to me.

   David was also deliberately dancing around the subject of his and
Monica's relationship.  Not that I could blame him.

   "I guess it started 'cause of what you two were doing," I said
hesitantly.  David nodded like I had just confirmed his suspicions, but let
me go on.  "I didn't expect it, but...  it feels good.  It's...  I don't
even know how to describe it."

   "That's okay," David said with a tight smile, "I know what you mean.  I
can't believe she would tell you and not even let me know though."

   "She didn't.  I already knew."

   "Oh." He seemed to have some trouble processing that one.  "How long
ha-"

   "A while," I interrupted.

   "Oh," he said again.  "Shit."

   "Yeah, that was Monica's reaction too."

   "And of course she wouldn't waste the opportunity to mess with me," he
said, putting the pieces together quickly.  "You understand we didn't want
to have to hide it from you."

   "Don't worry, I get it.  It's hard to trust anyone with something like
that."

   "It wasn't about trust so much in some ways.  I know you wouldn't tell
on us, but it's not really fair to put something like that on you.  It was
bad enough that we had to deal with it sometimes.  Not that I regret it at
all, but it's not without its problems."

   "Yeah, I can see that.  Even if I don't necessarily agree with it.  So
what now?"

   "I don't know, I guess we just see what happens."

   A thought occurred to me.

   "Does that mean you're okay with me and Monica messing around?" I asked.
"'Cause we don't have to do it anymore if it bothers you."

   "Why would it...  anyway yeah, it's cool.  I don't mind getting to see
some of that every now and then."

   "That's pretty much what Monica said you'd think about it."

   "Well she does know me pretty well."

   "I guess I just didn't believe at first that you'd be interested at all
in me."

   David thought about that one for a minute.

   "That's always a tricky one though isn't it," he said slowly.  "Like
partly you spend a lot of time repressing any kind of sexual thoughts about
the 'wrong' sorts of people so you might not even know yourself who you're
interested in.  I suspect, although feel free to prove me wrong, that you
weren't planning on getting involved with Monica up until right around when
it happened."

   I nodded.

   "That's pretty much how it went with Mon and me too," he said, "'cept it
was also awkward as hell for a little while.  Worth it though."

   "So how do you think of me now?" I asked softly.

   Again he appeared to choose his words carefully.

   "I think I need to talk with Mon about it," he said.  "That said, if
something were to happen...  it wouldn't exactly be torture."

   "You're a charmer alright."

   "Aw come on.  It's still weird for me to, like, talk to you about this
stuff.  Give me some time to adjust."

   I smiled a little at his discomfort.  Finally I wasn't the only one in
new territory.

   "If it makes you feel any better, I don't know if I'm ready to...  take
things too far yet either," I said, gesturing wildly as I struggled to
imply 'sex' without actually saying it.

   David nodded like he understood.

   "It's a big step," he agreed.  "Sometimes I feel like Monica doesn't
always see things that way though, like she's in it more for the thrill
than for an actual relationship.  I'm glad you're thinking about it."

   My eyes went wide at the hint that there might be unseen trouble between
my siblings.

   "Monica wouldn't-" I started, then was interrupted before I could even
start to make my point.

   "Oh don't worry, I'm mostly joking," David said, waving his hand
dismissively.  "I know she takes it seriously when she needs to."

   "But not as seriously as you," I said with a growing certainty.  "You
love her."

   I didn't fully know why I said it, I might have been way off on what the
problem was, but as it turned out I was right.

   "Yeah, I do," he admitted.  "Not that she doesn't, but sometimes it
would just be nice if it didn't matter that I was her brother.  If that
makes any sense."

   It made plenty of sense to me.  When it came to Monica and me, we were
just messing around.  Our being sisters just added to the fun.  If it was
something more serious than that, I knew I'd want it to be based on more
than an accident of birth too.

   "On the other hand, it is way hotter that she's my sister," he mused. 
"And yeah, before you say anything, I know I can't have it both ways."

   "I was almost starting to feel a bit sorry for you too," I said.

   "I'm sorry.  But I never get to talk about this stuff with anyone.  It's
nice just to say it out loud even.  Thanks for that," he said, squeezing my
knee gently.  "Anyway, I'll leave you to it."

   He got up and left before I could figure out how to respond.  If nothing
else, I at least felt good about being someone David thought he could talk
to.  That's all I'd really wanted from my siblings a few days ago when they
still thought their secret was actually secret, and now I had that and
more. So far so good.

   ****

   Monica returned a little after lunchtime, and I ran into her in the
kitchen while she was making a sandwich.  I had just been passing through,
but I stopped when I found her there.  As long as I was more or less a
neutral party between my siblings I decided I might as well make use of it.

   "What?  Am I in the way?" Monica asked when I didn't say anything right
away.

   "No, I just wanted to ask you something."

   "Okay."

   "Do you love David?"

   That phased her as I suspected it would.  It was an awfully blunt
question.

   "Yeees," she said, eyeing me suspiciously.

   "Good.  You should tell him that."

   Monica stared at me a moment longer, then turned back to her sandwich.

   "You're frigging weird sometimes, you know that?" she said.

   I grinned like it was a compliment.

   "Thanks," I said, then started to walk away.

   "You should come to David's room tonight," Monica said just before I
left the room.

   I turned back, but by all appearances she was still ignoring me and may
as well have given me a casual 'good-bye'.

   "Uh, okay," I said.

   ****

   If she'd wanted to leave me nervous and guessing the rest of the day,
Monica had done a pretty good job.  There didn't seem to be anything I
could do to stop myself thinking about her invitation for anything more
than a few minutes at a time.  Not that I didn't want to accept, but it was
going to be another big step for me in a very short amount of time.  Unless
she was just messing with me and had nothing the least bit sexual planned.
I didn't think that's what she was doing, but I wouldn't have entirely put
it past her either.

   There was no question of sleeping that night at what would have
otherwise have been my normal bedtime.  It would have been a completely
wasted effort.  Instead I continued fiddling with a book I was reading or
some homework I had while also glancing at the time at regular two-second
intervals waiting for it to be late enough.  I kind of hoped Monica or even
David might come tell me when it was time, but I suspected the decision,
including when to join them, would be left up to me.

   Finally I just got too impatient and crept out of my room, treading as
silently as I could on the floor of the hallway.  First I checked Monica's
room and, as the lack of light coming under the door indicated, she wasn't
there.  There was however a faint glow coming from farther down the hall
where David's room was.  I didn't hear anything as I approached and I
knocked softly on the door to see if I'd get answer.

   "Come in," Monica called.

   That confirmed she was there at least.  I opened the door and found both
her and David on his bed, both with their shirts off already.  Assuming
they'd started with any shirts on anyway.

   David's bed was bigger than either mine or Monica's, although it
actually wasn't really a proper bed in some ways.  It was just a box-spring
and mattress directly on the floor, he'd preferred it that way for a while
and at times I could see why.  If nothing else, it did remove the
possibility of a the bed frame creaking during sex.

   "You took your time," Monica told.  "We thought we might not see you at
all tonight."

   "You never said what time," I protested.

   "Mon's just picking on you," David interjected.  "She was over here way
earlier than normal.  Even though she's always accusing me of me of being
impatient."

   "This is different," Monica said firmly.  "I wanted to make sure I
wasn't the last one here."

   "God forbid anything happen without you in the middle of it," David
said, rolling his eyes.

   "Exactly.  I'm glad you understand," Monica said, pretending to be
oblivious to his sarcasm.  "Now then...."

   Suddenly the attention was all on me.  Both Monica and David looked at
me as though I was expected to know what to do, and I definitely didn't.

   "What?  Why are you guys staring at me?" I asked.

   "No reason," Monica said after a slight pause.  "Why don't you come up
here on the bed with us?  Or wherever you're comfortable.  You can just
watch if you want.  David would like to see you with less clothes on though
I'm sure."

   She poked our brother playfully as she said the last part and he
responded by tickling her mercilessly on he sides until she broke free and
rolled away to the end of the bed.  With the two of them being topless, it
was quite an interesting scene to watch. 

   "Alright come here," Monica beckoned me a little breathlessly.  "We need
to get rid of that shirt of yours.  You won't match us otherwise."

   "But you just said-"

   "I changed my mind.  New rule, you have to at least take off your top if
you want to stay."

   Maybe she had a sudden, inexplicable desire to see my boobs, maybe she
had just correctly read my reactions and decided she could get away with
her demand.  Either way I knew I didn't want to leave yet.  I was already
feeling the pleasant first signs of arousal and I wanted more.

   "Don't pay any attention to her," David told me when I hesitated.  "She
makes up rules all the time with me too.  You don't have to do anything if
you don't want to."

   "My rules usually work out pretty well for you," Monica countered. 
"They're for the greater good."

   David snorted, but I spoke up before he could say anything else.

   "I'll do it," I said quietly.  "But not if you're both looking at me
like that," I added when I realized that I was going to become the center
of attention again.

   I got two nods of acceptance to my terms, and without warning Monica
raised herself to her knees and pounced on David.  That left the half of
the bed she'd been on free, and with the two of them doing something
halfway between making out and trying to knock the other onto the floor, I
had some small amount of privacy.  At least for a moment.

   I was wearing a tank top and pyjama pants, similar to what I'd been
wearing that morning since it tended to be what I wore to bed most of the
time.  I closed my eyes as I pulled my top off, I wasn't sure how exactly
that would help but I did it anyway.  When I reopened them I was still
unobserved, giving me more an odd sense of disappointment than relief.

   It was only when I bounced down on the mattress to join my siblings that
they stopped what they were doing and once again turned to me.  I got two
appreciative looks from them, as well as a motion to come closer from my
sister.  She looked about ready to be done with David and jump me instead,
but all she did was kiss me when I got close enough.  Just a quick, loving
kiss.

   "Fuck that's hot," David said.

   I blushed slightly, but along with the small amount of embarrassment
came the arousal that I was starting to get used to.  I liked being
desirable to both my brother and sister, it was exciting in a way that
nothing else in my life had ever quite matched. 

   "You like that don't you?" Monica said, and I got the feeling she was
actually talking to both David and me, although it was directed more at
him.

   "Yeah, I do," David said.

   Monica kissed me again, for longer this time, and played with my breasts
a little too.  I stayed passive and let my sister control the pace, which
mostly meant keeping my arms out of the way while she explored my chest. 
At some point one of her hands and left, and was soon replaced by a
slightly larger, not quite as soft hand; David's hand.  I hadn't been
expecting that, but I wasn't about to complain.  It was different, but it
still felt good.

   I was slowly overwhelmed by the combined attention of my siblings and
was eventually pushed onto my back.  I put up a pretend struggle when they
tried to pull on my pyjama pants, but Monica pinned me to the mattress and
let David finish removing them.  I didn't get to see his reaction to seeing
me naked for the first time since I was busy kissing Monica again.  It then
occurred to me that I hadn't yet actually been fully naked in front of her
either.

   Even after I was stripped Monica wouldn't let me up.  She pushed me back
a couple times when I started to sit up until I got the hint and stayed
where I was.  She then scooted over to a position where she could lay my
head in her lap and look down at me while also getting a good view of what
David was up to.

   My brother had been running his hands up and down my legs, particularly
the inside of my thighs.  For a moment I thought her was actually getting
ready to have sex with me, and even though I still didn't know if that was
what I wanted I was ready to go along with it at that point.  I felt safe
with him and Monica, and I could have been convinced to do most anything
without too much trouble.

   It turned out not to be anything quite so extreme, and I kind of
suspected that it had been worked out before hand without my input since
David looked at Monica rather than me for confirmation.  While Monica
stroked my hair soothingly, David leaned down until his face was very, very
close to my pussy.  For the second time in two days it appeared I was going
to be eaten out by one of my siblings, and I felt a little thrill of
wrongness run through me at the realization.

   He started out slow, testing the new area he had to work with, but it
was obvious fairly quickly that David knew what he was doing maybe even
more so than Monica.  That made sense since, as I imagined, he probably got
more practice licking pussy than she did.

   "He's good isn't he?" Monica said, reading my facial expression
perfectly.

   "Mm-hm," I agreed.

   "Just wait, it gets better."

   She was right.  As he grew more comfortable with me and my reactions,
David's ability to touch me in just the right places grew to a level of
near-perfection.  His fingers ran up and down my pussy lips, never quite
going inside, while his tongue did amazing things with my clit.  I wasn't
sure what exactly it was that he was doing to produce the effect on me,
possibly it was a mixture of things since he kept switching pressure and
tempo with no pattern I could discern.

   I came much faster than I expected to, letting out a gasp that was as
much surprise as it was pleasure.  My experienced brother gave me a short
break after that, leaving my clit mostly alone for a minute or two while he
continued stroking the sides of my pussy.  When he thought I was ready he
started up again, building up to an even more intense pace than before.  I
didn't think I lasted any longer this time, but I did see it coming sooner
and was more prepared when my second orgasm hit.  It hit me harder this
time and I thrashed around a bit, unable to make out the words that Monica
was saying even though I could see her lips moving above me.

   "What?" I asked stupidly.

   "Nothing," she said, smiling at me in a very motherly kind of way. 
"Just relax."

   "Yeah, that sounds like a good idea."

   Monica slipped her legs out from under my head, replacing them with a
pillow.  It wasn't really the same, but I knew my chances of getting her to
come back weren't good.  Not with the looks her and David were giving each
other.  I'd had my turn, now it was theirs.

   They helped each other remove their remaining clothing, hardly taking
any time at all to do so.  There was a clear lust in their eyes for each
other, not to mention David's blatant erection confirming his state of
arousal.  Being recently sated, it wasn't quite as fascinating to me as it
might otherwise have been, but I still watched with a detached interest as
my brother climbed on top of my very willing sister.

   Taking care of me must have been more than enough foreplay for them as
penetration happened as soon as they were in the right position for it. 
David sunk easily into Monica's pussy accompanied by a satisfied purr from
her.  There was an urgency to their movements as David began thrusting
rhythmically and Monica rocked back in time with him, but also a level of
synchronization with each other that prevented any awkward fumbling or
missteps.

   However serious or fleeting David's previously confessed fears on the
issue were, I didn't think there was any real danger in his and Monica's
relationship.  I could see the love between them as though it was circled
with a big red marker as they alternated kissing and staring into each
other's eyes.  It was that particular love that was unique to them and I
knew might never be for me, but that was okay.  I didn't want to get
between them.  I could have plenty of fun without our relationships
changing any more than they already had.

   The more I watched my siblings' love-making, the more my previously
satisfied horniness slid back toward being unsatisfied.  It was hard not to
get turned on again watching two people fuck about a foot and a half away,
let alone when they were my own brother and sister.  I idly fingered myself
a little as the show went on, but refrained from full-on masturbating.

   The inevitable eventually happened, David cumming shortly after Monica,
and was followed by the two of them lying tangled together in their
afterglow.  It was a beautiful sight, two lovers oblivious to anything
except each other.  I may as well not have been there anymore, and I
decided it probably was actually about time to leave them alone.

   "Where you going?" David mumbled sleepily as he saw me get up.

   "Come back," Monica added, holding her arm out to me.  "Stay with us."

   It was a genuine offer, I could see they really did want me to stay and
I wouldn't just be in the way, but I'd made up my mind about a few things.

   "Maybe some other time," I said, smiling to show them I wasn't feeling
any regret or anything.  "This was fun, but I think I've had enough for the
night."

   They both nodded, accepting my decision.

   "G'night," Monica said.

   "Night," David echoed.

   I picked up my pyjamas from the floor and exited the room without even
putting them back on.  I figured there wasn't any significant chance of
anyone seeing me before I got back to my room, but I miscalculated in that
being naked in the hallway still produced a reaction to the perceived risk,
even if there wasn't any.  The short journey to my bed, combined with what
I'd been feeling from watching Monica and David, left me horny all over
again.  I sighed to myself as though it was an inconvenience, but the truth
was there were a lot of things going through my head, a lot of new
fantasies in particular, and I kind of wanted to explore them a bit anyway.

   Eyes closed and mind full of various images of naked siblings, I
masturbated unhurriedly until I finally fell asleep.


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