Brother Pins His Sister Down and Breeds Her Every Night in Their Shared Bed

They had shared a bedroom since they were small. Two single beds pushed against opposite walls, a narrow strip of carpet between them, posters and old photos still clinging to the walls. Now they were both adults, home again for the summer, and the room felt smaller than it ever had.

The sister lay on her side facing the wall, listening to her brother’s breathing. It was past midnight. The house was silent. Their parents slept at the far end of the hall. She had been wet for hours, thighs pressed together under the thin sheet, one hand resting low on her stomach. She had tried to ignore it. She always tried. Tonight the ache was too strong.

She slipped out of bed. The floor was cool under her bare feet. She wore only an old oversized shirt that barely covered her ass. No panties. She had stopped wearing them to bed weeks ago.

Her brother’s eyes were open when she reached his bed. He didn’t look surprised. He simply lifted the sheet.

She climbed in.

The mattress dipped. Their bodies faced each other in the dark. She could smell his skin—soap and warmth and something darker. She reached between them, found him already hard inside his boxers, and curled her fingers around the thick shape. He exhaled slowly through his nose.

“You’ve been thinking about it again,” he murmured.

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“Every night,” she whispered back.

She tugged his waistband down. His cock sprang free, heavy and hot against her palm. She stroked him once, twice, feeling him thicken further. Then she swung one leg over his hips and settled her weight on him. The head of his cock nudged her entrance. She was soaked. She sank down in one long, slow slide until he was buried to the root.

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Both of them stayed still for a moment, breathing against each other’s mouths. The stretch was familiar now and still overwhelming. She clenched around him and felt him twitch.

“Fuck,” he breathed. “You’re dripping down my balls already.”

She began to move. Slow rolls of her hips at first, grinding her clit against the base of his cock. His hands settled on her waist, then slid lower to grip her ass, spreading her open so he could feel every inch of her sliding up and down his length. The wet sound of it filled the quiet room. She bit her lip to stay silent.

He sat up suddenly, mouth latching onto one of her nipples through the thin shirt. He sucked hard, teeth grazing, while she rode him deeper. One of his hands left her ass and pushed the shirt up under her arms so he could get at bare skin. He switched to the other breast, sucking marks into the soft flesh while she bounced on his cock with growing urgency.

“Brother—” she gasped.

He growled against her chest and flipped them in one smooth motion. Her back hit the mattress. He hooked her knees over his elbows, pinned her wrists above her head with one hand, and drove into her hard. The bedframe tapped the wall. She turned her face into the pillow to muffle the broken sounds he forced out of her.

He fucked her with steady, deep strokes, pulling almost all the way out before slamming back in. Every thrust punched a soft, wet noise from between her legs. She could feel herself fluttering around him, already close.

“Look at me,” he ordered quietly.

She did. In the dim light from the window she saw the tight set of his jaw, the way his eyes stayed locked on hers while he used her. He shifted the angle, grinding against her clit on every inward stroke. Her mouth fell open. He covered it with his free hand just as she came, body seizing, thighs shaking against his sides. He kept thrusting through it, using the way she clenched to chase his own release.

When he came it was with a low, gut-deep groan. He buried himself to the hilt and pulsed inside her, thick and hot. She felt every spurt. He stayed there afterward, still hard, still deep, forehead pressed to hers while their breathing slowed.

He didn’t pull out.

“Again,” she whispered.

He started moving once more, slower this time, dragging his cock through the mess he had already left in her. The wetness made every stroke filthy and easy. He released her wrists so he could brace himself and fuck her deeper. She wrapped her legs around his waist and pulled him in. Their mouths met, open and hungry, swallowing each other’s sounds.

The second time he came he stayed buried even longer, rolling his hips in tiny circles so she felt every aftershock. Only then did he ease out. Cum slipped from her and onto the sheet. He looked down at the mess, dragged two fingers through it, and pushed them back inside her.

“Keep it in,” he said.

She nodded, dazed.

He pulled her against his chest, one heavy arm draped over her waist, his softening cock resting against her sticky thigh. She fell asleep like that, full and marked, listening to his heartbeat.

---

The next night she didn’t wait until she thought he was asleep. The moment the house went quiet she crossed the narrow space between their beds and climbed on top of him. He was already hard. She sank down without a word and rode him in silence, hands braced on his chest, until he flipped her onto her hands and knees and took her from behind. One hand covered her mouth. The other gripped her hip hard enough to bruise. He fucked her in long, punishing strokes that made her eyes water. When she came he followed right after, grinding deep and staying there while she trembled.

He cleaned her with his mouth afterward, slow and thorough, then pushed back inside her while she was still sensitive and fucked her a third time, slower, almost gentle, until she came again with a broken whimper against the pillow.

---

By the third night the routine was set. She would slip into his bed. Sometimes she woke him with her mouth, sucking him slowly until he was fully hard and leaking, then climbing on top and taking him inside her. Sometimes he was the one who woke her, already between her legs, cock sliding into her before she was fully conscious. She would moan softly and spread wider for him.

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They learned each other’s bodies with obsessive focus. He discovered that if he pressed his thumb against her clit while he fucked her from behind she would come so hard she almost sobbed. She learned that if she clenched rhythmically around him while he was buried deep he would lose control and flood her within minutes. They used those discoveries every night.

One night he made her sit on his face first. He held her thighs open and licked her until she was shaking and dripping onto his tongue. Only then did he pull her down onto his cock and let her ride. Another night he kept her on her back with her knees pushed to her chest, folding her nearly in half so he could watch every inch of his cock disappear into her. He talked the entire time—quiet, filthy words about how tight his sister’s cunt was, how she was made to take her brother’s cum, how he was going to keep her full every night for the rest of the summer.

She came harder when he called her his sister.

They started leaving the window open a crack so the cool night air could touch their sweaty skin. The scent of sex clung to the sheets. She stopped bothering to change them. Some mornings she woke with his dried cum on her thighs and his fingers already working her open again for a quick, quiet fuck before the rest of the house woke up.

One night she was especially needy. She climbed on top of him and rode him with short, desperate bounces, tits bouncing, mouth open. He let her use him until she came, then rolled them so she was on her stomach. He covered her body with his, laced their fingers together against the mattress, and fucked her in deep, grinding thrusts that kept her clit pressed to the bed. She came twice more like that, muffled screams swallowed by the pillow, before he finally emptied himself inside her with a groan that sounded almost pained.

Afterward he stayed on top of her, still inside, kissing the back of her neck and shoulder.

“You’re mine,” he whispered. “My sister. My dirty little secret. I’m going to keep breeding this cunt every night.”

She nodded against the pillow, too wrecked to speak, and squeezed around him in answer.

---

Weeks blurred. The shared bedroom became their entire world after dark. They fucked in every position the narrow bed would allow. She learned the exact angle that made his cock drag against the spot inside her that turned her mind white. He learned how hard he could grip her throat while he came without scaring her—just enough pressure to make her clench tighter.

Sometimes they talked while he was inside her. Quiet confessions. How long they had both wanted this. How wrong it was and how neither of them cared anymore. How she loved feeling her brother’s cum leaking out of her the next day. How he loved watching her walk around the house knowing she was still full of him.

One night he pulled out just before he came and stroked himself, painting her stomach and tits with thick ropes. Then he scooped the mess up with his fingers and pushed it back into her pussy, followed immediately by his cock, fucking his own cum deeper into her. She came from the filth of it alone.

Another night she woke him by already sitting on his face, grinding against his mouth. He gripped her ass and ate her until she flooded his tongue, then dragged her down and forced his cock into her still-fluttering cunt. He fucked her through the aftershocks until she was begging him to stop and keep going at the same time.

They never used protection. Every night ended the same way—him buried deep, pulsing inside her, leaving her marked and claimed. She started craving the feeling of being full. On the rare nights he came on her skin instead, she felt almost empty until he pushed it back in with his fingers or tongue.

The bedframe eventually loosened from the constant motion. They had to shove a folded towel between it and the wall to keep the noise down. Their parents never noticed. Or if they did, they never said anything.

By the end of the summer the sister could no longer fall asleep in her own bed. The moment the lights went out she crossed the small space and climbed into her brother’s arms. He was always hard for her. She was always wet for him. He would slide into her slowly, almost lazily, and fuck her with long, deep strokes until they both came, then stay inside her while they drifted off.

Sometimes she woke in the middle of the night to him already moving again, cock hard and thick inside her, one hand covering her mouth so she wouldn’t wake the house. She would push back onto him and let him take what he needed. Other times she was the one who woke first, reaching between their bodies to guide him back into her while he was still half-asleep. He always finished what she started.

They never spoke about what would happen when summer ended. They didn’t need to. Every night he pinned her down and bred her, and every night she opened for him like she had been made for it.

The shared bedroom stayed their secret. The sheets stayed stained. And every single night, without fail, the brother buried himself inside his sister and filled her until she had nothing left to give except the soft, broken sounds she made against his palm.

That was how they slept. That was how they woke. That was how the summer—and everything after—belonged to them.