I Breed My Sister in Grandma's House

I was 22 when it all changed, two years ago in the summer of 2024. Sarah was 25. Our parents had died in that plane crash when I was ten and she was thirteen—twelve years earlier. The funeral was a blur of black clothes and quiet sobs. After that, Grandma took us in, her big old two-story house on the edge of town becoming our whole world. She was strict but kind, raising us with rules and routines while we leaned on each other harder than most siblings ever do.

We grew up sharing the grief, the chores, the late-night talks on the creaky porch swing. Sarah was always protective, always there. I worshipped her. As teens we were inseparable, but nothing crossed the line. Not until adulthood.

Grandma passed peacefully in her sleep in early 2023. The house was ours now—just me and Sarah. The emptiness hit hard. One rainy night in June 2024, we were drinking wine on the living room couch, talking about Mom and Dad like we did sometimes. Sarah’s eyes were glassy. She wore an old tank top and tiny sleep shorts, her long dark hair loose. Her breasts pressed against the thin fabric, nipples faintly visible.

"I don’t know how I’d survive without you" she whispered, scooting closer. Her thigh touched mine. "You don’t have to" I said. My hand found hers. The air thickened. She looked at me—not like a sister, but like a woman starving for something real. I kissed her. Soft at first, then desperate. She moaned into my mouth, climbing onto my lap, grinding down hard, she breathed, biting my lip, Her hands yanked my shirt off.

I slid my fingers under her shorts. She wasn’t wearing panties. Her pussy was soaked, slick heat coating my fingers as I rubbed her swollen clit. Sarah gasped, rocking against my hand.

We didn’t stop. Clothes flew. She dropped to her knees, eyes wild with hunger, She pulled my pants down, my hard dick springing free. Sarah licked her lips, then swallowed me deep, throat working, gagging wetly as saliva dripped down my shaft, She bobbed fast, eyes locked on mine, worshipping every inch.

I couldn’t hold back. I pulled her up, bent her over the couch, and slammed into her dripping pussy in one thrust. She screamed in pleasure, Her walls clenched tight, milking me as I pounded her. Skin slapped loud. I gripped her hips, thrusting deep, balls smacking her clit. She came hard first, squirting around my cock, body shaking.

We fucked all night—on the couch, the floor, her bed. She rode me reverse cowgirl, ass bouncing, begging the whole time. "Cum inside. Knock me up. I want your babies so bad. Breed your sister" I filled her three times that night, thick loads pumping deep into her fertile pussy. She kept my cum inside her, fingers pushing it back in, moaning about how full she felt.

After that, we were unstoppable. We stopped pretending. The house became our love nest. Every morning she’d wake me with her mouth on my cock, We’d fuck in the shower, her pressed against the tiles, legs wrapped around me while I bred her again. She was insatiable.

We fell deeper in love than I thought possible. Dates turned into weekend getaways. She’d wear sundresses with no panties, letting me finger her under restaurant tables. At night she’d whisper filthy love confessions while I was balls-deep "I was made for your cock. No one else will ever touch me. You own your big sister’s holes".

By late 2024 we got married in a quiet ceremony, just us, a judge, and two friends who didn’t ask questions. She wore white, glowing. That night in our honeymoon suite she was feral, I took her in every position, filling her womb repeatedly until she was leaking my cum down her thighs. She rubbed her belly, eyes loving and lustful "Twins. I want twins from you".

Two months later the test was positive. Sarah was glowing, hornier than ever. Pregnancy made her even more cock hungry. Her tits swelled, belly grew, and she’d beg daily, We’d have slow, intense lovemaking, Me spooning her, sliding into her soaked pussy while rubbing her clit and swollen belly.

The twins came in 2025— a boy and a girl, healthy and perfect. We named them after our parents. Sarah breastfed them with the same body I couldn’t keep my hands off. Even with newborns in the house, we snuck away constantly. She’d whisper while riding me in the guest room "Quiet… but cum deep. Breed sister wife again and again".

Two years later, our life is pure intense love and raw lust. Sarah still jumps on my cock every chance— morning, afternoon, midnight, We fuck like newlyweds while the twins nap. She loves when I talk dirty back, telling her how I own her womb, how her pussy was made for my cock, how we’re bound forever.

Our grandmother’s house is filled with love, laughter, and the constant wet sounds of our addiction to each other.