Story Details

My Big Sister

uosdwisrdewoh on Other Stories

My sister is fourteen years old. Five years younger than me. She’s kind of abnormal. She’s five foot eight and she must weigh two hundred and fifty pounds. But she’s not fat, she’s all muscle. She has some kind of hormonal imbalance that makes her muscles bizarrely large and hard. I guess I have to admit she’s got kind of a pretty face. And she has tits almost as large as her muscles. They’d be really sexy if they weren’t surrounded by all that muscle. And if she wasn’t my sister of course.

Tonight my mom told me to stay home with her. As if I have nothing better to do. As if she couldn’t stay by herself at fourteen. Well I was going out with my girlfriend, damn it! I was telling her all this on the phone, except that my sister was sort of pretty, of course.

“Don’t be such a jerk.” Anna said. “She’s a nice girl.”

“Yeah, yeah. Forget her. I’ll pick you up in an hour.”

I opened the door and jumped in surprise. Jenny was standing there, filling the doorframe with her insanely muscular body. There was a hurt and angry look on her face but I was even more pissed.

“Were you listening, you little brat??”

“Why do you always call me little, Steve? I’m bigger than you.”

“What? No you’re not.”

“Oh sure, you’re a couple inches taller than me but I outweigh you by forty pounds. And I’m a lot stronger than you.”

“You’re not stronger than me, Jenny. You’re just a freak. Now get out of the way.”

Actually I was pretty sure she was stronger than me. But I had no intention of finding out. I was still older than her and she had to listen to me.

“Well, let’s find out.” She grinned.

“Jenny, move!”

If you’re so strong, why don’t you make me move.”

I reached out to shove her out of the way. She grabbed my hands, intertwining her fingers with mine and squeezed.

“Ah!! Damn it, Jenny, let go!!”

Shit, I knew she was strong but I had no idea she was that strong!

She squeezed again. The muscles in her forearms bulged and I screamed and dropped to my knees.

“Who’s stronger, Stevie?”

“You, okay!?”

She let go of one hand and spun me around, bending the other arm painfully behind my back.

“From now on I think you should call me ‘Big sister‘.”

“You fucking bitch!”

She pulled, almost dislocating my arm.

“Ow!!! Fuck!!”

“Who’s your big sister?”

“You, damn it!! You’re my big sister!!”
She put her leg over my shoulder and released my arm. Her other leg straddled my neck and she flexed her massive thighs squeezing me painfully. I wrapped my arms around those huge bare thighs and tried to pry them apart. I couldn‘t budge them.

“But I don’t want a little brother.” She mused as I struggled in the vice-like grip of her thighs. “Little brothers are gross. I’ve always wanted a little sister.” She giggled. “From now on, your name is Stephanie!”

Her thighs relaxed and I slid my head out of their grip. I knelt there gasping for breath. I couldn’t even yell at her. And I didn’t know what I would say. She was clearly much stronger than me.

Oh shit! I had a hard-on too! All that contact with her bare thighs, her huge legs rubbing against my body, how could I not?

I moaned.

“Borrow some of my clothes? Of course, Steph. What’s a big sister for?”

She yanked me to my feet and dragged me down the hall in a headlock. She shoved me onto her bed and hopped up next to me.

She started pulling off my shirt.

“Jenny!! What the hell? Cut it out!”

“Now Steph, if you’re going to be my little sister you have to dress the part.”

She started pulling off my shorts and my underwear was coming with them. She pulled them down with one hand and held me down with the other on my chest.

Now I was stripped naked on my little sister’s bed. And I still had a hard-on. Worse than ever! Any dignity I had was long gone so I begged.

“Jenny, please! I’m sorry! You’re stronger than me and bigger than me, okay? Please let me get dressed. Please!”

“What is this, Steph?”

Her fingers wrapped around my hard dick.

“Jennnnny Pleeeeease!” I whimpered.

“I’ve never seen a little girl with one of these.” She said, stroking it with her strong fingers. “You’re kind of a freak, you know? Of course I’d never say something like that cause I’m your big sister and I love you.”

She pulled me into a sitting position and gave me a crushing hug. Her powerful arms pressed me against those huge tits.

“I love you too, Jenny. Please let go.”

She let go and kissed me on the cheek.

She giggled. “Now let’s get you dressed.”

She started pulling things out of her drawers and closet. I sat naked on the bed, to traumatized to do anything..

“Oh this would look so pretty on you! You really don’t have the boobs for this one, no offense, sis. Hmm, maybe this?”

She came toward me holding a pair of pink panties. She grabbed me by the ankle and started pulling them on.

“Jenny! I can do it!”

“Oh I know, Steph.” She said in a condescending voice. “You’re a big girl. But let big sister help. When Mommy left she said ‘Take care of your little sister.’ And that‘s what I‘m gonna do.”

Mom had said that. Of course she’d been talking to me.

Jenny pulled the panties up and tucked my erection into them. Then she pulled a pair of very short shorts over them. I stopped struggling and just let her do it. I couldn’t stop her anyway.

She picked up a shirt off the pile. “Oh, this is gonna be so cute on you!”

She pulled the shirt onto me. It said CUTIE PIE. It was meant to be skin tight and even though it had been stretched over Jenny’s humungous tits it was tight on me too.

She dragged me in front of the mirror.

“Awww, you’re sooo pretty! Now we’ve got to do your nails and put some makeup on you. But first you have to call Anna and tell her you’re not coming.”

Anna! Oh god! If she could see me now…

“No! Fuck you, Jenny!!” I started pulling off her shirt.

“I will not have my little sister using that kind of language! Come here!”

She grabbed me by the wrist and dragged me over to the bed. She dragged me across her lap and held me down. My struggling was completely futile. She pulled down my shorts and panties.

“Jenny, no! Please!”

“This is for your own good, Steph. Little girls cannot have potty mouths.”

Her hand connected with my ass with a loud SLAP!! I couldn’t believe how much it hurt!

“Jenny, I’m sorry! Stop! Please stop!” I squirmed on her lap, trying to get away from her incredibly hard blows. By the end of ten whacks I was reduced to sobs.

Jenny finally stopped spanking me. She pulled me up into her lap and cradled me in her strong arms with my head resting against those huge, soft breasts.

She rocked me gently and rubbed my back. “Okay, sweetie. I think you’ve learned your lesson.”

Jenny’s shorts and panties were still around my ankles and I had a boner again sitting in her lap. She took her hand off my back and started rubbing it in the same soothing way.

I gasped. “Jenny, what…”

“Okay. Time to call Anna.”

“Jenny, no. Please??”

“Anna’s a nice girl. You can’t just stand her up and hurt her feelings.”

“But what should I tell her?”

“The truth. That you’re spending the night at home with your big sister.”

“I can’t tell her that!”

“Okay, I’ll make it easy for you.”

She stood up and took me by the hand. She led me to the phone then she twisted my arm behind my back again. I fell to my knees.

“Ah, Fu- Jenny! Stop!! Okay, okay!!”

She let up on my arm slightly. “Dial the number.”

I picked up the phone and dialed Anna’s number.


“H-hi Anna.”

Jenny increased the pressure slightly. “Now repeat after me. ‘Anna, I’m really sorry but I have to break our date tonight.’”

I tried to pull away and Jenny squeezed harder.

“Ah!” Through clenched teeth I gasped. “Anna, I’m really sorry but I have to break our date tonight.”

“’I’m hanging out with my big sister tonight.’”

“I’m hanging out with my…big sister tonight.”

“’But next time I see you I promise I’ll take you somewhere really nice and buy you something.’”

“But next time I see you I promise I’ll take you somewhere really nice and buy you something.”

“Steve? Are you okay? I didn’t know you had an older sister. What’s her name?”

“I’m-I’m fine. My sister Jenny. You’ve met her.”

“But she’s-”
“I’ve got to go, Anna. Sorry. See you tomorrow.” I hung up quickly.

“Well that was kind of rude.” Jenny said but released me.

I sighed. “You win, Jenny. What do you want to do now?”

She giggled. “You don’t have to look so sad! I’m a fun sister! I‘m going to give you a makeover and do your nails. It‘ll be just like a slumber party.”

I groaned.

Jenny put on some teeny bopper music and painted my nails then put a bunch of makeup on me. She made me try on all different feminine outfits and model them for her. Having no other choice, I submitted to all of it. Just when I didn’t think this could possibly get any more humiliating she pulled out her camera and started clicking pictures of me in her clothes covered with makeup.

Jenny threw her arms around me giggling. “Oh you’re the best little sister ever! Just like playing with a big doll!! But I promised Mom I’d take care of you so I guess I’d better give you a bath and put you to bed.


“Jenny, what-”

“Come on, now. No pouting. You can have bubbles.”

Jenny lifted me up and carried me to the bathroom. There was no sense in fighting her so I wrapped my arms and legs around her and put my head on her shoulder.

When we got to the bathroom she put me down and started running the water. She put bubbles in and tested the temperature.

“Okay, Steph. It’s nice and warm. Take off big sister’s clothes and fold them nice.”

I did as I was told. What choice did I have?

She picked me up and deposited me gently in the warm water.

When she let go of me and moved back the front of her shirt was soaked. She wasn’t wearing a bra and I could clearly see her hard nipples.

“Oops!” She giggled. “Naughty girl, getting big sister all wet!” She pulled the shirt off over her head and those huge beautiful tits were completely bare, inches from my face.

“What’s this?” She reached down and flicked my dick, which was now sticking up out of the water. “This little thing again? Okay, whatever. Time to wash.”

She picked up the soap and started to wash me. Her strong hands were all over my body. Those big, soft tits bumped against me as she washed me thoroughly. Finally her hands ended up on my dick and balls.

She held it in her strong grip stroking it with the soap. She rolled my balls around in her powerful hand.

I gasped and closed my eyes. I couldn’t take it! I shot my load right in her hand.

“Eeew! What’s this goop, sis?”

I opened my eyes to see her creamed hand right in front of my face.


She giggled and washed off her hand in the water. “Okay, time to wash your hair. Slide down.”

Jenny washed my hair then I stood up and she wrapped a towel around me and dried me. Then she took me back to her room. She rummaged around in her closet again and handed me a nightgown.

“There you go.”

Resigned, I slipped it on. It barely covered my ass.

I turned and saw that she had changed into a short nightgown too while I was getting dressed. Her big tits were covered and I was disappointed that I hadn’t gotten a glimpse of her taking off her shorts.

What the hell was wrong with me?? This was my sister! I’d cummed in her hand and now I was wishing I could see her naked!

Despite the guilt, fantasies of her round, hard butt and soft, wet swollen pussy filled my head. I pushed the fantasies away and focused on the nightgown, tugging at it in annoyance.

“Jenny, this-”

“It’s perfect.” She said, pulling it down a little more and patting my butt affectionately. “Now I’ll tuck you into bed and read you a story.”

I looked at the clock.

“It’s only nine.”

She looked over at the clock and then flashed me a smile and a conspiratorial wink. “Oh okay! You can stay up and watch a movie with big sister. Just don’t tell Mom.”

Jenny led me downstairs and put on a movie and turned the lights off. On the couch she pulled me close to her and wrapped her powerful arms around me.

It was a horror movie. She covered my eyes during the scary parts. Just two years ago she would have been scared of this stuff. Now she acted like she was protecting me from it. But what could I do? I just leaned my head against her soft breast and tried to enjoy the movie.

It was almost midnight when the movie ended.

“Okay, now it’s really time for bed, sis.” She picked me up and carried me up the stairs. “Don’t worry. You can sleep with big sister so you won’t have nightmares.”

I didn’t argue. That actually sounded good. Really good.

She carried me to the bathroom and we both brushed our teeth then she put me in her bed and crawled in next to me.

In the dark I felt her strong hands pulling me close and her big, bulky body pressing against mine. She wrapped her arms around me from behind, spooning me.

“I had a lot of fun tonight, Steph. You’re a great little sister.”

“I had fun too, Jenny. You’re a great big sister.” I was pretty sure I meant that.

“Hey Steph, tell me a secret!”

“What? Why?”

“Cause that’s what sisters do in bed, silly. Tell each other secrets.”

“Well…okay. My secret is…that I think you’re really pretty, Jenny. You’re beautiful. And your muscles are amazing! Everything about you is amazing!”

“Aw! That’s so sweet!”

She hugged me tighter, crushing the breath out of me, but I didn’t mind.

“Okay, here’s my secret: I love having a little sister but I’m starting to think a little brother could be fun too.” She slid my nightgown up and grasped my dick. Her voice dropped to a sexy purr and she whispered in my ear: “You can do all kinds of things with a boy that you can’t do with a girl. At least not the same way.”


She pulled me onto my back and rolled on top of me. She was so heavy and her body was so hard! She sat up, straddling my hips and pulled her nightgown off over her head. She was so big!! Those huge tits, Huge, powerful arms, chiseled abs, the fine blond patch of her pubic hair pressing against my legs, and those thick, unbelievable thighs wrapped around me.

She grabbed my hard dick again and slid forward up my body. I felt the hot wetness of her pussy against my dick.

“Jennyyyyyyyyy” I moaned.

She put a finger over my lips.

“Shhhh! It’s okay, little brother. Just relax. Big sister’s gonna take care of everything.”

me a bath??

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