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Crossing The Line With My Twin

Crossing The Line With My Twin

by zilvvann
14 min read
4.11 (24400 views)
adultfiction
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Disclaimer:

This story contains mature themes, including violence, taboo subjects, and psychological tension. The actions of the characters are fictional and are not intended to endorse or condone harmful behavior. All characters are depicted as being over the age of 18. Reader discretion is strongly advised.

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Emma was born seven seconds before me, but for most of our lives, I was the older twin. Our dad died when we were still young. He used to make up stories on the spot, weaving grand fantasy worlds out of thin air. After he was gone, I started writing. Mostly short stories--I wasn't very good. Emma was my harshest critic.

School made things harder. We drifted apart. She found new friends; we stopped hanging out. We began insulting each other in the way most siblings do. I was resigned to losing her, so I began writing a poem about her. About being her half--a reflection in a mirror, forced to look back at myself through her. She made me write a new one each night. That was the catalyst back into our twin bond. She'd lie next to me on my bed, watching as I whispered every word out loud. Even now, with her in college, she still comes to my room, curls up on my bed like always, and stares at the back of my head until I stop everything and read her what I wrote. It's always about her. I thought we'd stay like that forever, bound by our twin connection.

Then came that night, a year ago. The wind shook the windows, slamming against the glass. The storm had cut the power, so she was in my bed. I'd already read the poem, but she didn't leave. She said nothing. She rested her head on my shoulder, and her hand lingered on my chest. I covered it with mine. I kissed her hair--soft, black, coconut-scented. That scent always stayed on my pillow.

On any other night, I would've been alone with that pillow--holding it to my face, breathing her in, eyes closed, picturing her on top of me. Her body moving, her breasts bouncing with every thrust.

But not that night.

That night, she pressed her slim frame against mine, thigh to thigh, her eyes locked on mine. In the hush of the shadows, I felt her hand slip under my shirt. Mine wandered too--slowly up from her knees, tracing the softness of her legs. That feeling still lives in my fingertips. Her fingers drifted along the edge of my underwear, back and forth. My tip throbbed--aching for her.

Then we heard the front door open.

The heat vanished, leaving cold sweat on our skin. She pulled away. No words. Just got up and left me there, the scent of her still on my sheets. She went downstairs to stay with Mom. I lay awake, face buried in the pillow. Holding it like it was her. Thrusting into my mattress, imagining her underneath me. When I heard her footsteps sneaking past my door again, I came. Hard. And then I finally slept.

The next morning--and every morning after--she refused to speak to me. Refused to meet my gaze, no matter how hard I searched her almond eyes for a trace of that night's lust. She stopped coming to my room. But I kept writing.

I wrote about the girl I'd touched in the dark. The way she squirmed beneath my hand, how her eyes never left mine, how the heat of her palm hovered over my cock. I held on to those minutes--those precious minutes in my bed--with a desperation I didn't understand yet.

Each day, I saw less of her. She started leaving early for college, staying out until late. When she came home, she stank of alcohol. I stood in my doorway, watching her walk past--tight tops, short skirts, bare legs for anyone to see. To desire. To need. Skin damp with sweat from dancing to music she didn't even like.

I could've lived with it, I think--if she kept coming back to me. Safe in her room. Even if she reeked of cigarettes. Even if she stumbled in drunk, or passed out on the couch high off whatever.

But the first time she didn't come home...

I opened Instagram, scrolling through tagged posts, snooping through her friends' stories until I found her--caught mid-dance, bathed in swirling lights, her grey dress hitched high over her thighs. Her back arched into some guy's chest. His hands on her hips, his face buried in her neck. Her ass against his groin.

I kept scrolling.

There he was again.

And again.

Always where I should've been.

Touching my sister. My twin.

I waited for her. Days passed, but I knew she'd come home.

At night, I wrote more poems--about her in some asshole's hands, about her enjoying someone else's touch. And I messaged them to her. Every one of them. One by one. I typed each letter remembering her whimpering my name, remembering how I should have held onto her--how I should have crossed the point of no return.

The glow of my screen lit my face through the night as I waited for that read receipt. I buried my face in my pillow, but not a trace of her scent remained. So I slipped into her room. Her bed was still unmade from the last time she'd crashed after a party. I climbed onto it. Pressed myself into her pillows. Rubbed them all over my body. The coconut scent had faded--now it was tobacco. But it was still her.

And all of her was mine.

I wrapped one pillowcase around my face, breathing her in. The other I pulled tight around my cock, thrusting into the fabric until I stained it with precum. Inside the pillow against my nose, I felt something crumple--a plastic texture.

An old photo. Us. My arm around her waist, hers hooked around my neck.

So I could see her--right there beside me, fingers deep inside herself, wishing for me. How many times had she soaked her slit thinking of that night? I tore at the covers and sheets, pressing myself into the mattress, right where her pussy would've been.

And I inhaled her. And I licked. And I forced the tip of my cock everywhere. Every place with a trace of her, from the spots where her hot juices had once landed. I couldn't stop stroking, my cock was pulsating, I could almost taste her, feel her beautiful tits against me, making her scream for me. My body tensed up as my balls began to unload, I shot my cum all over her bed. I was still sitting half naked on her bed by the time the sun came up.

I spent most of the day sleeping. I woke in the evening, and somehow, I knew Emma would come home later.

I waited by the door, staring out the window at the streetlight casting its glow on the pavement. About an hour later, a car pulled up. She stepped out. Her dress clung to her slim silhouette, but she didn't look drunk this time. Instead, she was arguing with the driver.

He got out too, shouting. She kept waving him off, telling him it was over, that she wouldn't see him again.

Then he grabbed her arm.

I was already outside. He was on the ground before I even realized what I'd done. I shoved him back and kept Emma behind me. She was quiet now. The guy--he wasn't much bigger than me--climbed back into his truck and drove away. I took her hand and walked her inside. I examined her arm, searching for any marks he might've left. There it was: a reddened spot where his hand had gripped her skin.

"It's not normal..." she whispered, avoiding my eyes. "It's not okay."

"But you still came," I said.

I touched the same spot on her arm, pressing my fingers there--covering his prints with mine.

"I couldn't read it all," she murmured. "It was disgusting."

"You read enough," I said. "You wouldn't have come otherwise."

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She didn't respond. Her eyes were fixed on the floor, her arm still in my hand. I could feel her pulse beneath my fingers.

"Emma."

She flinched a little at my voice--then stilled.

"You let him touch you," I said, not hiding the bitterness. "Was that the guy you've been with since that night?"

Her eyes flashed with a mix of surprise and something else--maybe shame.

"No," she whispered, but there was hesitation, a subtle crack in her voice.

I didn't believe her.

"Why didn't you come back?" I pressed, leaning closer. "You could've come back to me. But you were with him, you let him hold you. Let him--"

"I didn't let him," she said, her voice trembling now. "It wasn't like that."

She looked so small, so fragile. Our bodies were pressed together, her back against the door. "Look at me."

Her face was flushed now, her breath uneven. She looked away, but I took her face in my hands.

"Tell me you don't want me, Emma," I said softly. "Tell me you didn't think about me while he had his hands on you."

She flinched but didn't look away. My hands fell down to her hips, feeling her cold skin, pulling her to me. Letting her feel my growing bulge.

She shook her head. "Don't."

"Why not?"

"You are my brother."

"Then tell me to stop."

My hands ventured beneath her skirt.

Her face hovered just inches from mine--and still, no resistance. No words.

And then I felt her panties: wet.

"Wait..."

The word barely made it past her lips.

"He's not here," I whispered. "No one's watching. No one will know... Dad won't know."

She closed her eyes. A tear slid down her cheek, her jaw trembling.

"If you walk away now, I'll never touch you again. I'll stop writing. I'll forget all of it."

She didn't answer. She didn't move.

I pressed my lips to her cheek, then her neck.

She held her breath.

Her hands curled into fists at her sides.

I kissed--slowly, at first.

She tilted her neck, offering more.

Her hands found my shoulders, gripping tight.

I bit her, deep enough to leave a mark.

"You are mine, my little sister."

I tasted her cold sweat as it slid to her mouth. I paused. Her glossy lips barely touched mine.

I groped her tits over her shirt--she moaned into my mouth.

Tilting my head, our tongues met, mixing spit. Saliva coated both our lips.

My cock was rock hard, raging, pushing against my jeans.

I pulled her hand to it. She stroked me through the fabric, and I moaned with her.

"Say it." I grabbed her throat.

"I--I'm yours..." she managed, as I squeezed gently.

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I lifted her. Her legs wrapped around my back. My hands hiked up her skirt, squeezing her ass, spreading her open. I carried her upstairs to my bed. She bounced lightly on the mattress, looking at me--eyes full of hunger, waiting. I locked the door, stripping my shirt and jeans. She was still fumbling with hers. I grabbed it and tore it from her.

Her bare nipples--round, flushed--were right in front of me. I lunged forward, sucking and biting them, cupping each tit in my hands. And I thought of all the times that guy had touched her. I would reclaim every inch of her. I sucked harder. My grip left her skin red, marked by me.

"It hurts..." she murmured, trying to push my face away.

But I was too far gone.

I slid her skirt down, taking her panties with it, and pushed my tongue inside her. The salty musk filled my nose. My tongue lapped at her wetness.

She clamped her thighs around my head. I grabbed them tight, pulling her down into me as I shifted position. My cock throbbed--ready to bury itself in her. I swung her around and laid my weight on her.

I thrust between her thighs, feeling our bodies grind together. My mind was filled with her sounds--every moan, every breath. I pushed her face down, grabbing a fistful of her hair, and held her hand with my free one.

I nudged her entrance, letting her slickness coat my shaft. Her lips parted, and I pushed in. Her heat welcomed me--tight, wet.

My precum mixed with her juices as she lifted her ass to take more. I rammed deep, my balls slapping against her.

I fucked her like I hated her for making me wait. Like I loved her so much I wanted to ruin her for anyone else. Her body was mine, but it wasn't enough. I leaned over, breath hot against her ear.

"I want to put a baby in you," I whispered into her ear, my cock buried deep inside her, pulsing with the threat of it.

She gasped--no words. Her body froze beneath me, then pressed back, just barely.

"I want you full of me. I want you carrying my son," I said, slower now, in a harsh dry tone. "You want it too, don't you?"

But before her silence could break, I heard it--the front door.

A key turning.

Footsteps.

Our mom.

We both froze. Her head twisted toward the door, eyes wide, breathing wild. I didn't stop. I couldn't. I clamped a hand over her mouth. She moaned into my palm, her voice trembling between fear and pleasure.

"She can't hear us," I whispered into her neck. "Stay quiet for me."

Her eyes fluttered shut, tears leaking from the corners. I felt her body tense, fight, then tremble again under me as I slowly rocked my hips. I thrust deeper, slower--so she could feel everything.

The weight.

The want.

The future I was trying to force into her.

She writhed, softly, helplessly. Her hips began to meet mine. Small movements. Almost involuntary. Her fingers clenched the sheets, her breath short and ragged against my hand.

Downstairs, I heard the kitchen drawer open. A cupboard close. She whimpered into my palm. Her whole body shook.

"You can't pretend you don't want this," I whispered, pressing deeper into her. "I love you, sis."

She squeezed her thighs around me. I felt the heat of her, the slick, the need. Her body was begging. But she never said the words.

I knew what I was doing.

And I knew she wouldn't stop me. My hand slipped from her mouth and wrapped around her throat again, my other hand pinning her wrist to the mattress.

"I'm not pulling out," I said, voice shaking. "I want you to remember this moment--every time you feel my baby inside you. You could still tell me to stop."

She shook her head--but there was no sound. Her mouth opened, but nothing came.

And still--her hips pushed back. She lifted herself to take me. I felt it rise inside me, the pressure, the unbearable need to finish inside her. I pushed as deep as I could and came, hard, gasping against her back. My cum shot into her, thick and hot, and I held her still, pinned, forcing her to take all of me.

Downstairs, a door creaked.

We didn't move.

She was shaking beneath me, breathing through sobs.

I stayed inside her, softening slowly. My hand slid from her throat to her waist. I pulled her in tighter, resting my forehead against the back of her head. I slipped my hand between the mattress and her belly, and I swear I could almost feel how her womb called for me--how it would grow.

Suddenly, I felt the need to cry.

"I'm sorry," I whispered.

She didn't speak.

She didn't look at me.

But she didn't leave either.

Not until the morning.

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