The house was silent except for the low hum of the refrigerator and the distant tick of the grandfather clock in the hall. I stood in the doorway of her bedroom, watching her sleep. She was twenty-three now, no longer the awkward girl who used to steal my shirts, but a woman whose body had ripened into curves that made my blood run hot every time she brushed past me. Her name was Lena, and for years the thought of her had been a secret poison I carried alone.
Tonight the poison had become a plan.
She stirred when the mattress dipped under my weight. Her eyes fluttered open, dark and confused in the moonlight. “What are you doing here?” she whispered, voice thick with sleep.
I didn’t answer with words. My hand slid beneath the thin sheet and found the warm skin of her thigh. She gasped, but she didn’t pull away. That single hesitation was all the permission I needed. I leaned down and kissed her, hard and claiming, tasting the faint sweetness of the wine she’d had at dinner. Her lips parted after a moment of resistance, and her tongue met mine with a shaky, guilty hunger.
“Brother,” she breathed against my mouth, the word both protest and surrender.
I pushed the sheet down. She wore only an old T-shirt and cotton panties. I stripped both away in rough motions, baring her breasts, her soft belly, the neat triangle of dark hair between her legs. Her nipples were already tight. I took one into my mouth and sucked hard, rolling the other between my fingers until she arched and whimpered.
“We can’t,” she said, but her thighs parted when my hand cupped her cunt. She was wet already, slick and hot. Two fingers slid inside her easily. She clenched around them, hips lifting.
“You’re ovulating,” I told her, voice low and certain. I’d tracked her cycle for months. “Your body wants this. My cum. Deep inside you.”
Her eyes widened, but the confession only made her wetter. I pulled my fingers free and licked them clean while she watched. Then I freed my cock, thick and already leaking. I rubbed the head along her slit, coating myself in her arousal.
“Tell me to stop,” I said.
She bit her lip. Her silence was answer enough.
I pushed inside her in one long thrust. She was tight, almost too tight, and the sound she made was half pain, half ecstasy. I bottomed out, my balls pressed against her ass, and held still so she could feel every inch of me claiming her. Then I started to fuck her.
Each stroke was deliberate, deep, grinding against her cervix. I wanted my seed as close to her womb as possible. Lena’s hands clutched my back, nails digging in. Her legs wrapped around my waist, pulling me deeper.
“Harder,” she finally gasped. “Fuck me like you mean it.”
I did. The bed creaked. Her tits bounced with every thrust. I pinned her wrists above her head and drove into her with the kind of focused, relentless rhythm that said I wasn’t leaving this bed until her belly was full of me. Sweat slicked our skin. The smell of sex filled the room.
When she came the first time, she bit my shoulder to keep from screaming. Her cunt fluttered and squeezed, milking me. I didn’t stop. I kept fucking her through it, through the aftershocks, until her eyes glazed and she begged in broken whispers.
“Fill me. Please. I want it. I want your baby.”
That was all it took. I slammed in deep, grinding my pelvis against her clit, and let go. Thick ropes of cum pulsed straight into her fertile depths. I stayed buried, hips twitching, making sure every drop stayed inside. When I finally pulled out, I pressed two fingers back into her to push any escaping seed deeper.
We didn’t speak for a long time. I lay beside her, one hand resting possessively on her lower belly. She turned her face into my neck.
“Again,” she whispered after a while. “Don’t stop until you’re sure.”
I rolled her onto her stomach, lifted her hips, and slid back inside. This time I took her slower, savoring the way my cum made everything slick and filthy. I talked to her while I fucked her—told her how her womb was going to swell, how her breasts would grow heavy with milk, how everyone would know she’d been bred by her own brother.
She came again, sobbing into the pillow, and I followed, adding another load to the first. By the time dawn light crept through the curtains, I had taken her three more times. Her thighs were sticky, her pussy puffy and used, and my cum leaked from her in thick white trails no matter how many times I pushed it back in.
Lena lay curled against me, one hand resting over her abdomen as if she could already feel the change beginning. I kissed her temple.
“Mine now,” I said quietly.
She nodded, eyes closed, a small, secret smile on her lips. Outside, the world kept turning, unaware that a new life had just been planted in the most forbidden soil.
