TL;DR: This
is a story about a sister and brother being pretty mean to each other in
creative ways, and having a lot of sex. There’s a ton of size change. Major themes include unapologetic incest,
blackmail, degradation, lactation / breastfeeding, and girls with penises. If you’re not down for all that, change the
channel. Don’t @ me
This story is the product of one person writing all the taboo kinks that spoke to them in a particular moment, and putting them into one story. As such, it's possible I'll be the only person who enjoys this story. There's probably something in here for everyone to not like. All the same, I hope you come on this journey with me.
Content Warnings: Brother-sister incest, dubious sexual consent, lactation, female cock growth, male cock shrinking, cuckolding, blackmail, threat of revenge porn, humiliation, non-consensual size change, BDSM themes including: tickling, spanking, choking, hair pulling, and verbal degradation, arousal control, female growth, female shrinking, male shrinking, male growth, breast growth, male cock growth, muscle growth, muscle loss, mommy-dom themes, light fear play, sizes from 6 inches to 20ft, femdom, Underage alcohol consumption, Consensual pain during sex, Mommy Dom / Little play, crying, Dead Dove: Do Not Eat
Dead Dove, Do Not Eat? If you don't know, Google it. Basically, see those content tags up there? All of them are in this story. If you open this story, that's what you'll see.
Big Sis, Better Witch
by pseudoclever
My little
sister’s growth spurt was getting out of hand.
It had started after
her eighteenth birthday. As recently as
Christmas, Madison was laughably scrawny. Our height charts in the kitchen tell the
story. She’d reached four-foot-four
around her eleventh birthday, and then just… stopped. As the two of us got older, I kept insisting
that mom measure us every few months to see if maybe she hadn’t grown this
time. Even when we all knew damn well
she hadn’t.
It was
humiliating for her, I’m sure. But it
was fun for me to keep seeing my marks get higher and higher, while hers stayed
the same.
That had been
the story of her life. Watching her
older brother outgrow her. Watching all
her classmates hit puberty, start to develop, to out-class her in every way. Well… almost every way. Madison had an absolutely ridiculous pair of
hooters. They were G-cups the last time
I snuck a look at her bra. I’m not proud
of it, but it was just sitting there in the dirty laundry. I was curious, okay?
As long as I’m
being honest here, I’ll go ahead and admit that I’ve never been particularly
nice to her. I teased her a lot – about
her height, the size of her chest, whatever was handy. If mom wasn’t around, things tended to get
physical. Nothing too bad – mostly just
holding her down and tickling her until she gave up. If you ever met her though, you’d agree she
deserves it. Because tiny or not, she’s
always been a total brat.
Part of her bad
behavior is just plain old sibling rivalry.
I’m a year older than her, and I totally lucked out in the genetic
lottery. Popular, good in school, good
at sports. I even managed to land a
full-ride scholarship for college next fall. Meanwhile, she was just this weird antisocial
dwarf without a lot of friends. She’s
not good at hiding her jealousy, and what she lacks in stature, she more than
makes up for in her ability to piss me off.
The worst thing
though, is how mom always takes her side. Telling me to be the bigger person, and count
my blessings. While the little shit is
making faces at me from behind her back.
Even thinking about it right now is making me angry.
Anyway. I was talking about her growth spurt.
It was just
after spring break that I started noticing. How Madison’s baggy hand-me-down shirts
started to almost fit. How she could
reach things on the lower kitchen shelf without needing a step stool, or
begging me for help. From there, the
changes got more obvious. I swear I
could see her getting bigger day by day.
Nobody in the
house said anything about it.
Looking back,
that was kind of weird.
I remember the
first time it ever came up in conversation. It was April, and I think she was around five
feet tall. We were sitting across from
each other at the kitchen table eating breakfast. Mom was hurrying to get to work. She told us goodbye, and for the love of God
please be good. The door slammed behind
her.
The very moment
it did, Madison looked up from her cereal.
“I can see you
staring at my chest,” she snarled. “Stop
it.”
I glared back. “Don’t flatter yourself. I wasn’t staring. I was thinking about my date tonight actually.
If your dumb tits happened to be in my
way, that’s your own fault.”
“I have eyes,
Will. You’re like three feet away. I can see you looking down my shirt. I’m your little sister, for God’s sake. Exercise some self-control.”
“Okay, yeah. We’re three feet apart. And you’re wearing that low-cut top, without a
bra. And you’re so short, you’re resting
your boobs on the table and like, pillowing them at me. It’s entrapment. How am I supposed to avoid looking at your
fucking G-cups when you stick them right in my face?”
Madison pursed
her lips, smirking at me. “Hm. They used to be G-cups. But my boobs have grown a lot bigger since
this growth spurt started. How did you
know what size they used to be, Will?”
I sneered at
her, and didn’t say anything.
“You know how
this is ending?” she asked. “I think
I’ll start a rumor about it at school. How you were going through my underwear
drawer, looking at my bras. Everyone’s
gonna think you’re a total pervo creep.”
Madison knew
what came next. She was already pushing
back her chair, getting ready to run. But we’ve played this game too many times, and
I was ready for her tricks.
She tried to
make it to her bedroom, to lock the door behind her. She didn’t even make it to the stairs before I
grabbed her around the waist. Madison
was already laughing, even before her punishment arrived.
I started
tickling her.
“Stop! Fucking… I’m going to tell mom!”
“That only
means you’ll get it worse next time.”
She fought with
me as I dragged her to the couch. Kicking, and scratching, and laughing. She had grown a lot, and she felt stronger in
my arms too. Like you could almost say
she had biceps. But I’m six-foot-two,
and no slouch at the gym. Even if she
was kinda strong for her size, there really was no contest.
“Let me go you
asshole!” she giggled.
I held her
pinned beneath my armpit, face-down on the couch. Running my fingers over all her most sensitive
parts. Her tummy, the back of her knees,
the inside of her thighs. I was really
conscious of the weight of her breasts against my leg. She was right – they had gotten bigger.
“Promise you
won’t tell mom,” I snarled.
She held her
breath. But finally a giant sigh
exploded from her lungs, and she started to cackle.
I pressed my
advantage. “You won’t tell anyone. Say it.”
“I won’t! I won’t!”
“Say you’re
sorry!”
“I’m… ahhh! Sorry!”
Usually I let
her up as soon as she apologizes. It’s
only fair. I’m not sure why, but this
time I let it go on. She screeched and
struggled and swore at me. And then she
starting making this really weird noise – this soft, pathetic mewling from the
back of her throat.
I sorta felt
bad for her at that point. Like she
pissed me off, but I definitely hadn’t intended to take things this far.
I decided to
give her a break. I even wanted to let
her feel like she won – because I really do try to be a nice guy. I loosened my grip, and gave her a chance to
escape.
She didn’t take
it, though. Just buried her face in the
couch, pressed herself into my hands, and let me keep tickling her.
I finally gave
in and released her. I was expecting her
to stand up right away and run off. But
she didn’t. She just lay across my lap,
breathing hard, and shaking.
Her face was
red and puffy when she finally stood up. She wiped her eyes, and looked down at me with
this pathetic expression. I thought
about apologizing. I didn’t.
“You were,
though,” she said, in a tiny voice. “Staring at my tits.”
“Are you trying
for round two here Madison?”
She shook her
head, hard enough to make her bangs smack her in the face.
“Go wash up. You’re a mess.”
Madison nodded.
She
took two steps. And then turned back to
look at me.
“If my growth
spurt keeps up, you won’t be able to do that to me anymore. I’ll be too big for you.”
She said the
words without emphasis. Not a threat, or
a prediction. Just words.
“Even if we
were the same size, I’d still be strong enough to turn you over my knee and
make you cry for mercy. And no way is
any growth spurt on Earth getting you up to six-two. You’ll always be less than me, Madison.”
She opened her
mouth to say something. But then she
shut it, gave me a bratty-little-sister smile, and ran off to get ready for
school.
I didn’t see
Madison at all after we got home that night. Which was weird. Usually when my girlfriend is coming over,
Madison finds a way to be underfoot.
Tiffany and I
were in my bedroom. We were watching a
movie on my laptop. Ostensibly. Actually, we were making out. We’d been together for about a month, and so
far, making out was all we’d done. I
really wanted to take things further tonight, and I had the feeling she did
too. In my humble opinion, Tiffany was
the hottest girl in school. Long blonde
hair, perfect softball sized breasts. And she had this really adorable way of
half-moaning, half-laughing whenever I stuck my tongue in her ear.
It was only
thirty minutes until her curfew, and things were starting to get hot and heavy.
She was breathing hard on my neck, and I
had my hand under her shirt. My fingers
were massaging up her back.
“You can do
whatever you want with me,” she whispered.
My hands shook
with eagerness. I started to unhook her
bra.
“But shut the
door first.”
I froze.
“What’s wrong?”
Tiffany asked.
“Nothing. Give me a second.”
I stood up,
tucking my erection into my jeans so it wasn’t too obvious. I was completely sure I’d already shut that
door, and I had a sneaking suspicion I knew who opened it. In three quick steps I was out in the hall. I half expected to find Madison – on her
knees, caught in the act of watching us. But she was nowhere to be found.
I tip-toed down
the hall to her bedroom. I peeked around
the door… and saw her playing some computer game, listening to her headphones. Her back was turned, and she was acting like
she didn’t know I was there. She almost
had me fooled, she really did. Except I
could see the little pink blush on her neck – a dead-giveaway that she’s trying
to get away with something – and she was also sweating a little.
Plus her
headphones weren’t plugged in.
Tiffany was
still sitting on my bed. “Let me guess. Madison was spying on us.”
“Beauty and
brains. You really are the whole
package.” I kissed her.
She returned
it, but it was more a casual kiss, nowhere near as intense as before. Apparently the mood was gone. “It’s the third time she’s tried to watch us
make out.”
I cracked my
knuckles. “Don’t worry. I’ll set her straight.”
“Make sure you
tell me how that goes. In detail. But honestly, I feel kind of sorry for her.”
“Seriously? You’re not creeped out?”
“Hmm? A little. I guess. But she’s no threat. She's one of the least popular girls in
school. She always sits off to the side
at lunch, and she never talks to anyone. I know a couple people who are curious about
her – what with all the growing she’s been doing, and her, you know….”
“Huge boobs?”
“Those, yeah. But something about her puts people off. Or maybe like, she’s trying to keep them
away.”
I’d seen
Madison’s little sulking act first hand. We’d shared second and fourth periods last
spring, and I don’t think I ever saw her talk to anyone but the teachers. I could probably have tried to get her to open
up, introduce her to a few people. It
seemed like too much of a hassle.
“So I get it,”
Tiffany was saying. “Why she’d be
curious.”
I scoffed. “About her brother’s sex life?”
“About her hot
brother’s sex life,” she corrected. “Assuming he actually has one.”
I grinned, and
gently pushed her back down on the bed. “Well that’s up to you, isn’t it?”
When I reached
for her chest, she rolled toward me. Pressing her breast into my palm, arching her
back. She moaned, almost theatrically
loud.
I looked over
my shoulder, making sure the door was still closed. “What, do you actually want my sister
to overhear?”
Tiffany pursed
her lips, and seemed to consider the question for a long time. “I don’t know. The idea is kind of… sexy. Don’t you think?”
“Okay, but if
you get any louder my mom will hear us from downstairs.”
“Now that’s definitely
sexy.”
I laughed. Sure now that she was kidding. Tiffany has a great sense of humor.
I almost
succeeded in undressing her, because this time she was helping me. But then we heard my mom’s footsteps on the
stairs, and had to get back to just watching the movie, fast. Mom knocked, and told me it was time for the
two of us to say goodnight.
At the front
door, I kissed Tiffany again.
“Hey,” she
said, softly. “Just so your sister really
has something to be jealous about.”
She lifted her
shirt, flipped up the cups of her bra. And flashed me.
I made it back
upstairs, still feeling dazed. Madison
was lying on her bed, typing on her phone. Resolutely ignoring me. I thought about confronting her, telling her I
knew she’d been spying. But I knew she’d
deny it, and we’d just get in a stupid fight. I’d end up tickling her, and mom would have to
break it up.
So I got in my
own bed, and thought about happier things. The sheets still smelled like Tiffany.
