Note: This story was dynamically reformatted for online reading convenience.
 
 This is the second part of a series of my transformation from teenage
brother into sex slave to my gorgeous younger sister.

   Part 2

   Weeks past since my life and world as I knew it drastically changed.

   Mary had taken full control of my free time during what would have been
another playful summer vacation.  By her 16th birthday, her already
fabulous figure was becoming even more developed.  Her firm breasts filled
out even more, and she knew how to flaunt those ample assets.  She'd wear
low-cut tops, and skimpy shorts, presenting a tantilizing image to any teen
boy, and especially her willing brother.

   The rest of her body also was filling out.  Athletic and toned, she was
an image of beauty and fitness perfection.  Her running regime for soccer
kept her shapely legs is finely tuned condition.

   She had strength, she had sex appeal, and she had me in the palm of her
hand.

   Each passing day grew her confidence and control over her perpetually
horny older brother.

   On a nightly basis, I found myself spending another 20 minutes at the
sink, washing dishes as she was in her room resting and watching TV or
doing whatever.  With her brother doing her chores, she had more time for
what she enjoyed.

   I'd wash, dry and put the dishes away, and then head to her room. 
Keeping her room dusted and clutter free also was part of my duties.

   This ritual went on for weeks.  Each night, I'd wind up on my belly, on
the bed, hands bound behind my back and my lovely sister sitting by.  I
wished the nights would last forever, but quickly found out, my sister
wanted more.

   "This is getting old, Tommy," she said.  "I'm getting bored."

   She was about to untie me, and I snapped, "no, sis, please!  I'll do
anything to remain at your mercy."

   Her devilish mind began to spin.  A wicked smile crossed her face, and I
was soon about to find out what could be next.

   "I know what I need to do," she said, patting my head as she spoke.  "I
need show you off to some other people."

   Fear rippled through my body, but my cock twitched in my hands.

   "What do you have in mind?" I asked from my bound position.

   "Oh, you'll see, dear slave boy," Mary offered.

   With that, she sprung from her room, looked at me all trussed up, and
said, "don't go anywhere."

   She darted out of the room and made a phone call.

   I could hear her voice, only vaguely, but I knew what was next was going
to take my journey in another directly.  Exactly where, I would soon find
out.

   Minutes later, Mary returned, and found me exactly as she left me. 
Weeks of being tied up tightly had shown me there wasn't much use
struggling to get free.  First, her binding skills were excellent, and
tugging and squirming never worked before.  Another reason trying to escape
wasn't a good idea is, it pissed her off, she took it as an insult that I
was rebelling against serving her every whim.

   Now, most of the nightly bondage experience was non sexual.  Yes, out of
the goodness of her heart, she'd rub my hard cock, but it always was
through my pants.  When I came, my spunk would smear all over my cock and
balls, and it was trapped by my underwear.

   Mary never got nude before me.  Sometimes she'd change her top, but
would always turn her back to me.

   Neither of us was sexually active at that age.  To be honest, I didn't
know where serving her would lead.

   But Mary was now 16, and while she had boyfriends before, they were more
hang out friends.  An occasional movie, and a lot of kissing, and some
petting.  No relationship lasted more than a few weeks.

   For me, I was becoming more drawn to my sister than other girls, and
being under her wing was satisfying my sexual needs.

   "My slave," Mary said upon returning to the room.  "We're going out for
the night."

   Stammering, I blurted, "wha.."

   Before I could say a word, her voice hardened, "shut up until you are
asked to talk."

   I clammed up.

   To drive home her point, she got a hairbrush and smacked my ass hard
five times.

   "Ouch!" I belted.

   "Never, ever, talk back to me, slave!" Mary scowled, force in her voice.
"When I say we're going somewhere, you only respond, yes, sis."

   Now stay still while I get ready.

   As I rested on my belly, Mary placed a bandanna over my eyes, shielding
me from seeing what was next.

   I heard Mary in the room, sensing she was dressing for the night.  All
sorts of thoughts spun through my head.  "What could she be up to?  Where
was this leading?  Was I really willing to do anything?" Common sense told
me this is a bad idea.  But the raging hardon and the sexual arousal that
tingled through my body made it clear my cock was clouding my better
judgment.

   Finally, after what seemed like ions, sis tugged me up to my feet. 
Positioned to stay still, she removed the blindfold.

   Blinking the brightness away for a second or two, my eyes focused on a
breathtaking sight.  Hands on hips, Mary stood before me.  She had put on a
provactive halter top that tied beneath her tits.  The top barely concealed
all natural gifts.  She also revealed much of her flat stomach, and had on
skin tight jeans that stopped above her diamondshaped calves.  She added
high heels, giving her already statuesque body about three more inches.

   Mesmerized, I stood, knees weakening at her built-for-speed look. 
Wrists still tied behind my back, all I could do was await what was to
follow.

   She kept me barefoot, and I was in gym shorts and a t-shirt.

   "Now, before you slobber all over yourself and ask a bunch of silly
questions, I'm going to gag you," Mary said.

   My bandanna blindfold was transformed to my gag.

   "Open wide," she said, ramming it in my my and notching it off behind
the back of my head.

   In a swift motion, Mary grabbed my left arm with her right hand, and
moved briskly towards the door.

   "Hurry, we don't to be late," she said.

   Stumbling a second before regaining balance, I tagged along, being
pulled outdoors, in front of my own house, tied and gagged.

   Thankfully at 8 o'clock, it was dark, and none of the neighbors were
outside at that particular moment.

   "Move faster, slave boy," Mary said, picking up the pace.

   We waltzed down the street, my feet careful not to step on any rocks or
anything else that could leave a mark on my exposed feet.

   The direction we were headed, I started to dread where she was taking
me. It didn't take long for my fears to become a reality.

   We headed up a driveway four houses down the street from our house.  The
front door was open, and staring out the screen was our neighbor, Donald.

   Everyone on the block knew Donald was bi.  The youngest of three boys,
his two older brothers were openly gay.  Donald, 18, was tall, about
6-foot, and he was a bit on the chunky side.  He was as comfortable talking
girl talk with the girls or hanging out with the guys.

   What I was about to find out is Donald was no stranger to the bondage
lifestyle, which until that day I didn't even know existed.

   "What do we have here?" Donald said sarcastically as Mary gave me a push
through the door.

   "I told you I had Tommy all tied up," Mary said, confirming her
authority.

   "I see," Donald said, spinning me and checking the knots.

   "He says he will do anything I say, Donald," Mary said.

   "Nicely done, girl," Donald countered.

   His eyes gave Mary a once over: "Looking amazingly hot, Mary.  Good job
with the outfit."

   I soon learned that in their phone conversation, Donald instructed my
dominant sister to dress to kill.  She didn't disappoint.

   "Let's get settled in," Donald said.

   Donald immediately took the lead.

   With his right hand, he reached under my tied wrists.  He drew his right
arm along my back until his right hand reached my neck.  In one swift
motion, he lowered me downwards by the neck.  The move he put me in, had me
standing but bent at the waist.  My head about the level of his crotch. 
The arms, behind my back were elevated and he was able to easily maneuver
me with one hand.

   Mary blurted out a laugh, seeing me manhandled with such ease and being
so vulnerable.

   "Let me inspect the bitch," Donald said.

   His left hand grabbed my crotch, and he could feel my cock was already
hard.

   "Oh, this little bitch likes the rough treatment," Donald said.  "I see
his thingy is excited."

   "This is a good sign, Mary.  Now, let's talk."

   Donald walked me over to the couch.  I presented an amusing sight,
walking slowly from my hunched over position.  My steps could only be slow
ones with my head pretty much between my own legs.

   Mary sat.  I was pushed to me knees, and Donald sat next to my sexy
sister.

   "You will kneel in our presence from now on, is that understand, bitch,"
Donald said.

   I muffled a yes through my gag.

   I remained still, kneeling before them as they settled on the couch.

   "So tell me what you two do behind closed doors," Donald asked.

   "Basically, Tommy does my cleaning and I kick his ass whenever I feel
like it," Mary said.

   "That it?" Donald said.

   Mary nodded.

   "Girl, you are missing out," Donald said.  "Listen, you are reaching a
point where you will start dating boys, and they'll be wanting to fuck you.
With a body like yours you will have no trouble getting guys.

   "Besides, girls like you are built for speed.  You have a great
opportunity to learn what makes guys tick and get all the sexual release
you need right from your own brother."

   "Donald, I am not letting the slave fuck me, he's my brother," Mary
said.

   "I'm not talking about you letting him fuck you," Donald said.  "But he
can certainly please you with his mouth, or make him pamper you in other
ways that get you sexually turned on.  Plus, you will learn what makes your
brother hard, and you can use that to your advantage with other guys."

   "Donald, I haven't done anything but kiss some guys and let them rub my
tits," Mary said.

   With that, Donald inched over to my sister, and put a hand on her tit,
sliding it inside her halter top.

   She moaned softly as he rubbed.

   "You like that, Mary," Donald said.

   He kept rubbing and she really liked the touch.

   Donald slid his hand away from her tits to between her legs.  He rubbed
her through those tight pants.

   "Oh, my," Mary cooed.

   My sister began squirming as Donald used his fingers to get her soaking
wet.

   Why not take your clothes off.

   Mary wasted little time getting naked.

   "What a hot piece of ass you are," Donald said.  "Let me show you
something else you can make your slave do."

   "What's that," Mary asked.

   Donald also undressed.

   Donald then removed my gag and my shorts, and he sat back down.

   "Now bitch I have an order for you," Donald said.  "You are going to
obey, with no hesitation.  If you hesitate, you will be punished."

   A pinch on my left nipple, prompted a small, "ouch."

   "Is that understood," Donald said through clenched teeth.

   "Yes, Donald, I will obey," I stammered.

   "Very good," he said, sitting on the couch.

   Donald began rubbing my sisters pussy with one hand and her tits with
the other.

   "Bitch," Donald said in my direction.  "Take my cock in your mouth."

   I hesitated, and was greeted with an immediate slap across the face.

   "Now," Donald said.

   My mouth took his cock and I began sucking on it.

   Donald went back to feeling up my sister as I sucked cock for the first
time.

   It seemed so wrong and yet was something that was right, because it was
obeying what my sister wanted.

   I feel Donald's cock grow, and I slurping on it, doing what my mouth
could do to please him.

   Mary loved what she was seeing.

   "You see, Mary," Donald said.  "Slave bitches can be used in many
different ways.  If you listen to me, I will lead you in all kinds of ways
to getting the most out of your live in slave."

   Donald's fingers were in Mary's pussy and my mouth was obeying orders.

   "You sure you haven't done this before, bitch," Donald said.  "You seem
like an expert."

   "From what I'm seeing, I may teach this slave to suck the cocks of my
boyfriends," Mary said.

   Donald settled back as I was forced to keep my lips pressed firmly on
his cock.

   "That's it, get it all wet," he said.

   After a few more seconds of slobbering, the order: "Stop!" was given.

   Donald withdrew his stiff rod from my mouth, and pushed me back onto
knees.

   "Mary, now it's your turn," the take-charge 18 year old said.

   "Bitch boy, you will lap your tongue all over your sister's pussy,"
Donald said.

   "You heard him," Mary enforced.

   Without my hands free, I had to kneel over a bit, lower my head and lock
my lips on my sister's sweet sex spot.

   Her scent was rich and her wetness had smeared from all the petting and
rubbing done on their end.

   My mouth went to work, tongue poking around, licking her tight pussy.

   Two hands on my head pushed me in even more.  I was smothered in sis's
sex, tongue wildly flailing.  Her hips tilted forward, thrusting her pussy
more firmly into my mouth.

   "Nice sight," I heard Donald say from behind.

   As I was lapping away, my knees were pushed wider.  I felt cold lube
being smeared around my ass crack.

   "Don't stop what your doing, bitch boy," Donald said.

   "Your tongue better not leave me for a second, my slave," Mary informed.

   I continued licking my sister as my ass was being smothered with lotion.

   Then I felt something poking from behind.  It was Donald's hard cock
pushing a few inches into my virgin ass.

   I moaned, but Mary's hand pressed my head into her pussy and she locked
those strong thighs around my neck.

   "Stay right here," she said.

   I was smothered, licking and slurping, while my ass was being taken.

   "Oh yes," Mary blurted.

   She thrust wildly as my tongue was servicing her at a rapid speed.

   Mouth and nose smeared in her juices, I licked all of my sister's tasty
folds, touching on all of her hot spots.

   The hard cock pressing into my ass had me bucking from behind.

   My sister leaned forward and kissed Donald on the lips.  The two using
me for their pleasure as I stayed sandwiched between them, becoming more
eager and willing to please all their kinky desires.

   In minutes, Mary wrapped her legs tighter around my head, and blurted
out grunts of orgasms.  Her pussy flush on my mouth inched in even more.  I
made sure to keep my mouth motoring until her quaking subsided.

   As Mary was grunting out her last bursts of pleasure, the stiff cock in
my ass was removed.  My head trapped between my sister's thighs, I couldn't
see what Donald was doing, but I was able to feel it.

   Spurts of hot cum was spray onto my ass and lower back.

   My two captors had both relieved themselves while I was left a sticky
mess.

   My hard cock dangled untouched.

   "Good slave boy," Mary said.

   Donald's cum began sliding down my butt crack as I was allowed to raise.

   Taking mercy, Donald wiped the cum off my back and Mary went to the
bathroom to clean up.

   My mouth and face were smothered in her juices.

   When Mary returned, she got dressed, as did Donald.

   I was left on my knees, tied, face and ass all sticky, and cock
dangling.

   "See, Mary, you can do much more with your slave bitch than just have
him clean your room," Donald said.

   "Oh yes, for sure, and I plan to," my sly sister said.

   Noticing my hard cock, Mary asked, "What should we do about that?"

   "Keep him hard and horny," Donald said.  "You may want to wrap it up to
keep him from being personally distracted."

   Donald used the bandanna that was my gag to knot my cock up.  There I
kneeled, hands tied, cock and balls wrapped like a present.

   "Oh, great touch," Mary said.

   "Remember, Mary, you have him by the balls, so make sure you do so,"
Donald said.  "The more you control how often your slave cums, the more
obedient he will be."

   Mary gave Donald a tender kiss bye, and thanked him for taking my
journey to a level that I didn't know was possible.

   On the way home, Mary informed me, "Tommy, slave, this is just the
beginning."