Author: Siscentis
Title: Sharing My Room with My Sister
Part: Part 6
Summary: After loosing a bet, Brad discovers Abby can be more
assertive, and imaginative, than he ever realized.
Keywords: inc, mf, oral, rim, cons, rom


Copyright © by the Author, 2014

Author's note: this story was previously posted on XNXX by myself
under the name "hardandsoft". This version is corrected and
edited.

------------------------------------

"So what do you want to do tonight?" My sister Abby was lying on
my bed as I came out of the bathroom. It was Friday, and we'd
just gotten home from school and had the house to ourselves.

"I have a few ideas," I said. I walked over next to her, standing
next to the bed.

"I think I know what you have in mind." She leaned her head
towards me and softly kissed my dick through my pants. "Last
night you didn't really get a chance to savor it."

Abby and I had been sharing my room since hers was flooded in a
storm, and had spent over a week being more than a simple brother
and sister. The night before, I'd come into my room to find her
already deep asleep, and too horny to be satisfied with porn, I
had started touching her. As I grew bolder, I had ended up
rubbing my dick against her lips until they had wrapped around my
head. Almost immediately I'd pulled out and cum. Only after I was
done did I find out she had been awake through it all.

I sat on the bed next to her. Our heads leaned together and we
began kissing. After our lips separated, she pulled away. "I just
remembered, I have a science project I need to work on this
weekend. I'd better start on it tonight." She told me what it
was. I'd had the same teacher the year before and had done the
same project.

"I remember that one. Isn't it a group project, though?"

"Yes, but the other members of my group didn't volunteer to do
much. It's easier if I do it myself."

"Abby, don't be such a pushover," I told her. Abby had always
been shy, and was afraid of confrontation. "It's not cool that
your group saddled you with all the work. Why'd you let them do
that?"

"I don't know, I didn't want to be the bitch."

"There's a difference between being a bitch and standing up for
yourself."

"Sorry."

"See, there, you're doing it again," I teased her. "Stop it! You
can't be so afraid of making other people uncomfortable."

She rolled her eyes. "Fine, I'll try next time."

She worked on the project a while, then we headed out to grab
some burgers for dinner. We got our food and sat down at a table.
Abby opened hers, sighed a bit and pushed it to the side.

"They get your order wrong?" She nodded. "Take it back up there
and get them to make you a new one."

"That's alright, I'm not that hungry."

"This is exactly what I'm talking about. A little confrontation
won't hurt anything. They get this a dozen times a day; they
don't care. We paid for it, they should get it right." She still
hesitated. I rolled my eyes, then took the burger back myself. I
came back a couple of minutes later with a new one. "See."

"Fine." She was obviously annoyed at my pushing her. I decided to
drop it for now.

We went home and Abby declared she was taking her dog for a walk.
Feeling anxious that she was mad at me, I grabbed my dog and went
with her. We walked down to the park together as we'd done for
years. When we got there we let the dogs off their leashes and
Abby threw a ball for her dog Angie, a blue healer. My dog
Willow, a German Shepherd, ran and beat her to it.

"Your dog's being a jerk," she said to me. She was clearly still
annoyed.

"My dog's fine. I think Angie's just being a push-over." I'd
reverted to my older, more antagonistic big brother self. My
comment clearly didn't go over well.

"No she's not! I bet she beats Willow this time."

"You're on." Buster brought the ball back to me, and I tossed it
back to Abby. As she picked it up, I stepped closer to Angie.
When Abby threw the ball, I grabbed Angie's tail a moment, giving
Willow a head start. "See. Angie is a push-over."

"Cheater. You're afraid of a fair race."

Willow had always been the faster dog. There wasn't really any
question who would win, but now Abby had committed to backing up
Angie's honor. I decided to exploit this. "Tough talk. What are
we betting?"

"Loser has to be the winner's slave for a day."

"Alright." It was a bet we'd done once a couple of years ago. I
had won, and had made Abby follow me around taking small orders
and then clean up my room before I lost interest and did
something else. This time, however, the old kid game had an
entirely new subtext.

Ideas were already coursing through my head for what I'd do with
her. Mom had 12-hour shifts tomorrow and Sunday both, giving us
free reign of the house. I could have her bathe and dress me, or
have her pose naked for some pictures. I didn't want to push her
too far out of her comfort zone, but a little might help make her
a little more assertive. Mostly, though, I wanted to get my dick
in her mouth again. I wondered how many blowjobs we could fit
into one day.

I got the ball from Willow and handed it back to her. She paused
a moment. "Are you sure you want to go through with this?" she
asked.

I wasn't about to let her back out now. "I do if you do," I said,
somewhere between confident and condescending.

"Alright," she said. She turned to her left and hurled the ball a
different direction than before, and the dogs went rushing after
it. Even as I wondered why she'd thrown it that way, I saw the
other dog down there.

Willow may have been faster, but Angie was the better trained. As
soon as Willow saw the other dog, she rushed towards it. Abby had
spent more time teaching Angie to follow commands and avoid
distractions. Willow had just started sniffing the other dog when
Angie grabbed the ball.

Abby had flat-out outsmarted me. Somewhat flabbergasted, I went
down and collected Willow. On the way home, Abby smiled,
whistled, and was almost skipping, all trace of her earlier
grumpiness gone.

At home we headed to my room to get ready for bed. Abby hit the
bathroom first and came out already dressed in her pajamas; a
white tank top and very short shorts. She walked up to me and
slowly wrapped her arms around me. Her mouth approached me as if
to kiss, then she stopped abruptly. "You'd better get a good
night sleep tonight, brother. Tomorrow's going to be a long day."
She released and slid past me to the bed. She climbed to the far
side and pulled the covers tightly over herself, facing away from
me. For the first time in over a week, I had to go to sleep
without release.

I woke up before Abby on Saturday, just early enough to see Mom
head to work. I had breakfast and sat on the couch, wondering
what Abby might have planned for me.

Around 10:00 Abby came in and sat down on the couch next to me.
"So, what are you going to have me do today?" I asked.

She seemed a little uncomfortable. "This is kind of silly. If you
don't want to do it, its ok, I understand. I don't want you to do
anything you're uncomfortable with."

I should have known she'd try to chicken out. I couldn't stand
seeing her wimp out again. "You're being a push-over again, Abby.
You won, fair and square. I have to be your slave today."

"Alright, just making sure. Since you're so adamant that I
shouldn't do that project myself, I've decided you should do it.
Let's go to your room."

We headed to my room and she went into the closet and started
rooting through my stuff. I wondered what she was looking for,
but was too distracted by her ass to ask. The shorts she wore for
pajamas barely covered, and when she bent over slightly, they
sunk into her crack and the curve of the bottom of her ass cheeks
stuck out the bottom.

After a minute, she found what she was looking for. She turned
around holding a bowtie I had worn to our cousin's wedding a year
ago. "This is what you're going to wear today." She tossed it
over to me, and I tied it around my neck. I turned to the
computer to start on the project.

"Hold on there, brother. I said you would wear the bowtie, I
didn't say anything about a shirt or pants." I turned back toward
her. She stood waiting. I took off my shirt and pants, leaving
just my boxer-briefs. She stepped over to me. "These, too," she
stuck her fingers in my waistband and pulled the front down over
my partial erection. She then slid my underwear down my legs,
squatting down as she did, until my dick was right in front of
her face. I stepped out of my underwear and she tossed them
aside. She reached up and lightly grabbed my cock with her
fingertips, then moved her head to one side of it and then the
other, examining. She held it straight up with one hand and with
the other, lifted up my balls in her fingers, as if weighing
them. She brought my dick down until it was pointed right at her
lips, just inches away.

"Today's going to be fun. But right now you have work to do." She
released me and stood up. "The instructions for the project are
in my folder by the computer. I'll be watching some TV."

About an hour later she called me into the living room. I walked
up to the couch, very conscious of my nudity. Being naked so
close to her, I couldn't help getting hard. "I want some lunch,"
she instructed. I went into the kitchen and made her something. I
took it in to her on a tray and put it right in front of her,
standing in front of the TV. My dick pointed right at her,
hovering above her food. "Looks good," she said. She patted the
side of the couch. "Wait here until I'm done so you can clean
up."

I stood beside the couch as she took her time eating, my dick at
attention a little ways from her. When she finished, I took the
tray back to the kitchen and returned to the living room.

"I need something to do until my next show starts," she said.
"Come stand over here again."  I walked over to the couch and
again stood next to the armrest, facing her. Abby reached her arm
around me and ran her fingers down my back and across my butt,
then grabbed with her palm. With her other hand, she tickled my
balls a moment, then ran her finger up my shaft and in a circle
around my head. She pinched my dick firmly with her fingers and
began stroking me, watching intently, until I started oozing
pre-cum. With the hand on my butt, she pulled me toward her
slowly until my dick came to her wet lips. Still stroking, she
slurped the clear liquid off the tip of my dick with three long
kisses, then ran her tongue from the bottom of my head across the
tip to the top. She pulled back very slightly, hovering her lips
next to my dick. Then she glanced at the TV.

"Oop, my show's starting." She released my butt and dick and sank
into the couch. "That's all for now. Go work on my project."

So horny I couldn't talk, I turned and walked away. It was clear
she was going to be an insufferable tease today. I decided I'd
have to take some of the edge off. I went into my room and shut
the door. Moving all the project stuff aside, I sat at my
computer and started browsing through porn sites and stroking
myself.

After only a couple of minutes, I heard the creak of the door
behind me. "I thought I'd better check on you. I don't remember
giving you permission to do that," Abby said. I didn't even have
enough time to close the browser. It wasn't the first time she'd
come in while I was looking at porn. I desperately hoped she'd
repeat her previous reaction. I kept stroking myself in front of
her, hoping she'd come over and help me. "Are you still my
slave?" she asked.

"Yeah."

"Then I don't think you should be doing that on my time." I
reluctantly released my dick. She climbed onto the bed next to me
and sat facing me with her back to the wall. She spread her legs
apart with her knees bent. She looked at the computer. "That does
sound like fun right now. Why don't you show me some things?"

I complied, my frustration mounting. I went through some pictures
like what we'd looked at before. Several minutes of handjobs and
pussyeating went by and I noticed that Abby's hand had slid
between her legs. With no panties on and her legs spread apart,
her shorts pressed against her pussy. Little hairs stuck out from
under the fabric on both sides. Her fingers ran smoothly along
her camel toe. "Need any help?" I asked hopefully. It was obvious
how horny I was. My dick throbbed slightly.

She waited a moment. "No thanks." She nodded back at the
computer. "Continue." I could barely stand it. Tired of clicking
through pics, I shifted to my collection of downloaded videos,
picking a handjob clip. "I think his dick is bigger than yours,"
she said. She pressed her legs together and lifted her butt up
slightly to pull her shorts down over them, then lifted her legs
up. She pulled her shorts up to her knees slowly, revealing her
bare pussy. The lips were round and soft, but I was close enough
to see that the skin was covered in tiny goosebumps where her
short fuzzy hairs came out. She pulled her shorts off entirely
and spread her legs again, running her fingers across her pussy.

I decided if she was going to taunt me, I'd have to call her
bluff. I closed the video and delved deeper, intent on finding
something shocking enough to embarrass her out of what she was
doing. Despite our time together, she was still just fifteen and
hadn't been exposed to much sex, especially anything real kinky.
"Let me show you some other porn I like. Just let me know when
you're ready to stop," I said. The next few videos showed
deepthroat blowjobs and one where the girl was sucking a guy's
balls. I looked over at Abby and she looked back at me, not
showing any discomfort. With her left hand, she spread apart her
lips. Her right forefinger ran along the pink flesh inside, and
then plunged inside. She closed her eyes and moaned for my
benefit, then looked back at me and nodded toward the computer.

I continued, looking through older stuff I'd downloaded without
knowing what it was, much of it unwatched since the first
viewing. A girl with a small vibrator on her clit came, squirting
as she orgasms. A girl is tied to the bed and fucked in the
mouth, swallowing all the cum. Two lesbians suck each other's
tits and then share a dildo.

Abby wasn't backing down. Seeing that I was looking at her again,
she pulled out and slid her fingers up to her clit. She closed
her eyes again and pressed down. Her pussy lips were wrapped
around her fingertips, as if deeply kissing them. She started to
rub in small circles. Her left hand ran up her stomach, pushing
her top over her tits, and grabbed the left one, pinching the
nipple slightly in her fingers. "Mmmm," she moaned.

I'd have to push her a bit further to break this. "This is one of
my favorites," I said, and pulled up another video. It was a
threesome, starting with a blonde and a brunette sucking a dick.
They continued by taking turns eating each other out. The
brunette bent over, letting the blonde lick her from behind.
After a minute on her pussy, the blonde's tongue ran up to the
brunette's asshole. I looked at Abby, expected this would be too
much for her, and slightly regretted pushing it this far.
However, Abby was continuing to watch and rub herself. It seemed
she knew what I was doing and wasn't about to back down.

In the video, the guy fucked the brunette from behind, while the
blonde situated herself right below them and licked between her
pussy and his dick. He pulled out and came on her, dripping cum
down the brunette's ass and pussy into the blonde's mouth.

I looked back at Abby. She continued to rub herself, now with her
eyes closed, I don't know if she'd been watching much of the last
video. She was rubbing herself vigorously, and her body was
tense. Her pussy lips were now wide apart and glistened with
moisture. Her fingers were moving so firmly now that her whole
pussy molded to every circle. Her thighs were tense and spread so
wide they almost pressed into the sheets.

She started to cum. Her free hand grab at the sheets, and her
feet pressed into the bed. Her butt lifted up, her ass cheeks
squeezed tightly, and her whole pelvis moved up and down in
irregular, spasmed thrusts. Her pussy lips were wide and wet, and
I could see her vagina squeezing rhythmically. A few drips of
white liquid ran out and slid down her ass crack. She started to
relax and lowered back onto the bed.

Her breathing started to settle. She opened her eyes and looked
at me, blushing. I smiled at her. Her eyes fell down my naked
body to my dick. "I thought I'd told you not to touch that."

Watching her masturbate had made me start stroking my dick again
without even thinking. I let go. It was rock hard, and throbbed
on my every heartbeat. "It's been hard so long it’s starting to
hurt," I told her.

Abby sat up. "I'm sorry. We can stop this slave thing if you
want. I don't want to make you uncomfortable."

I couldn't back out now. It would mean going back on our deal,
and it would mean eating my words to her earlier about being a
pushover. I knew she'd backed me into a corner, but I wasn't
going to give in. Plus, I really wanted to know where she'd take
us. I just shook my head. "You want me to finish your project
now, ma'am?"

"Yes."

She put her shorts back on and lay on the bed reading a book. It
took me another two hours to finish the project. I finally
finished and told Abby. It was starting to get late, in another
hour or so Mom would be home from work. I turned my chair to face
Abby on the bed. "The day's almost over, Abby. Anything else you
want me to do as your slave?"

"You've been such a good slave. I have one more thing for you.
All this schoolwork has made me tense. I could use a massage."
She peeled off her shirt and lay face down on the bed. "Start on
my shoulders."

I sat on the bed next to her, my bare skin touching her side. I
gently brushed aside her long red hair from her shoulders and
massaged.

"Now get my back."

With my thumbs, I pressed into her lower back, letting the
fingers on both hands slide along her sides, caressing. I worked
my way higher and higher on her back. My fingers brushed along
the sides of her breasts, and with each knead of my thumbs; I let
my fingers pull on her a little. My thumbs worked out from the
middle, letting my fingers get closer and closer to her nipples.

"Get my legs." Still being a tease.

I shifted down to sit by her legs. I worked on her calves, and
then moved up to her thighs. I worked up them slowly, pausing on
the inside about halfway up.

"A little higher up." She was getting more relaxed now. The sly
teasing in her voice seemed to be gone. Massaging more lightly
with just one hand, I moved up a bit higher and worked.

"Little higher," she said again. As my hand moved up, her legs
spread apart slightly. My fingers just a couple of inches from
the fabric over her pussy, I kneaded a bit, then slid my hand up
to massage the back of her thigh, my thumb running against the
edge of her butt under her shorts. I moved my hand to the near
thigh and worked inside again, teasing my finger an inch from her
pussy. Her legs spread even more.

"A little bit higher." She was almost whispering.

Lifting everything but the finger, I ran it up to the top of her
thigh, just underneath the fabric. I ran it along the seam of her
thigh and groin, feeling her short fuzz. I pulled back and moved
it to the other thigh, repeating the caress but letting it just a
little bit farther onto her pussy.

I took my finger and slowly and lightly pressed it on the fabric
right in the middle of her pussy, then ran it gently up and down.
Pressing just a bit harder, I made a slow spiral motion down its
length.

My finger moved back up her thigh to the side of her pussy, and
with my other hand I pulled the soft fabric to the side, giving
me access. My finger explored in her slit.

I was sitting on the bed with the side of my butt pressed against
her knee, turned facing her top, my arms stretched to where they
needed to be. As my finger started to work deeper into her hole,
she reached her hand back, slid up my thigh, and gripped my dick.
I pulled my finger out and brought to my mouth, tasting her
juice. Moistening my thumb, I slid my finger back into her pussy
and, sliding my thumb under her, gently rubbed at her clit.

Suddenly she released my dick and raised her butt in the air,
pulling away from my hand. She slid her shorts down to her knees,
and with her ass still in the air pressed her chest into the bed.
I slid her shorts the rest of the way off.  As I moved to put my
finger back into her, she spoke.

"Kiss my butt cheeks, slave." I was surprised at her request. I
couldn't believe my shy sister would ask for that. I wasn't about
to refuse, though. I climbed onto the bed between her legs. I
lowered down to the white, smooth skin of her cheeks, and gently
kissed one. Though I'd seen it a few times in porn, I'd never
thought about doing it myself before. Another time, I might have
just thought it was weird. But right then I was hornier than
hell, and having my shy sister command me to do it was easily
enough to put me over. I kept kissing along one cheek, then the
other, each kiss becoming deeper until I just ran my tongue
across her butt.

"The middle, too." I started kissing deeply down her crack to the
middle, then ran my tongue back up.

"Kiss my butthole," she said. This command wasn't as forceful,
but almost pleading. Too horny to bother thinking about it, I
started kissing softly on the inside of her cheek next to her
hole. I pressing my face between her cheeks and pressed wet lips
against her butthole. She exhaled sharply. I ran my tongue in a
circle around her hole, then spiraled in and made small circles
on it. She arched her back, thrusting her groin more towards me.

Running my hand along her thigh, I started lapping up her crack
across her butthole, heavier each time. With each lap I went
lower, reaching the fuzz between her pussy and ass. Pausing just
a moment, I moved down and ran my tongue deep between her pussy
lips and up until I reached her asshole, doing another circle. I
repeated a few times, then brought my hand back up and pushed my
finger deep into her pussy.

She pulled off my and turned toward me on the bed on all fours.
"Lay down." I brought my chest straight down onto the bed under
her head. "Turn over."

I flipped onto my back with Abby's tits dangling below her right
over my face. Before I could even rise to suck her nipple, she
crawled over me, bringing her knees to my elbows. Pushing up on
her arms, she lowered her pussy right onto my face. I buried my
lips and tongue into her pussy, sticking my tongue as far down
her pussy as I could, my nose pressed against her butthole.

She lowered her chest down, raising her pussy off my face just
slightly, and I stretched up to keep licking her. Her weight on
her elbows, I felt her hand wrap around my dick. She pulled it to
her face and wrapped her mouth around my head, sucking and
slurping as she stroked.

I reached my arm around her leg and got my finger wet in her
juices and started tickling around her butthole. I moved my mouth
to her clit and started licking and slid my finger back into her
pussy. Feeling her lips wrapped around my dick, I wrapped mine
around her clit and sucked gently, quickly rubbing my fingertip
up and down along the front wall of her vagina.

Abby started to cum. She sat up almost straight on my face. She
clenched her thighs to keep from smothering me, but squeezing my
face slightly. Her hand kept stroking my dick, and her other hand
pressed into my stomach. She started pulsing, harder than before
when she was masturbating. Her thighs pressed tighter a moment,
and then her pussy pushed hard against my face, pinning it down
to the bed as I kept sucking. Her vagina squeezed my finger in
spasms, and again a bit of white liquid dripped down around my
lips, finding a way into my mouth as I sucked.

It was the hardest I had ever cum. I felt the first squirts shoot
out like a rocket. A whole day’s worth of arousal came firing out
in spurt after spurt.

It took several minutes for us both to come down from our
orgasmic highs. She finally unstraddled me and fell into the
computer chair. I just lay where I was and looked over at Abby.
Globs and lines of my cum ran up and down her belly, on her tits,
on her face and in her hair. She smiled at me, and I watched a
glob roll off the side of her nose, over her top and bottom lip
and stop on her chin before she wiped it off with her finger.

Smiling, she started to say something, then paused and averted
her eyes as if she thought better. She giggled a bit and looked
back at me. "See, if you think I'm a pushover, you can kiss my
butt." I couldn't help but smile at her bad joke.