I never planned to cross that line with my sister, but once we did, there was no going back. It started on a humid summer night when our parents were out of town and we were alone in the old house. Lena was twenty-two, same as me, and she had always been the bold one. That evening she walked into my room wearing nothing but an oversized t-shirt that barely covered her ass. She climbed onto my bed without asking and said, Im tired of pretending I dont notice how you look at me.
Her voice was low and direct. I could smell her skin, warm and sweet from the shower. She straddled my thighs and ground down slowly, letting me feel the heat between her legs through my shorts. Touch me, she whispered. My hands went to her hips first, then slid under the shirt. She wasnt wearing panties. My fingers found her already slick and swollen. Lena moaned and rocked against my hand, riding two of my fingers while she reached down and freed my cock.
She didnt tease. She lifted up, lined me up, and sank down in one smooth motion. The wet heat of her pussy gripping me made my vision blur. We fucked hard and fast the first time, her nails digging into my chest, her tits bouncing under the thin cotton. Every thrust came with filthy words: Fuck your sister, Fill me up, Ive wanted this cock for years. I came deep inside her while she clenched around me, her own orgasm making her thighs shake.
After that night we couldnt stop. The next morning she woke me with her mouth, sucking me slow and deep until I was throbbing against her tongue, then climbed on again. We did it in the kitchen, the living room, the shower. She liked it raw and messybent over the couch so I could pound into her from behind, my hands spreading her ass while I watched my cock disappear into her. Shed reach back and rub her clit, telling me how good it felt to be fucked by her brother.
One afternoon she pulled me into our parents bedroom. She stripped naked on their bed and spread her legs wide. Eat me, she ordered. I buried my face between her thighs, licking and sucking until she flooded my mouth. Then she flipped me onto my back and rode my face while she leaned down to suck my cock. We stayed locked like that until she came hard, thighs squeezing my head, her moans vibrating around my shaft.
We got more adventurous. She started texting me during the day: Come fuck me in the garage before Mom gets home. Id find her bent over the workbench, shorts around her ankles, already wet. Id slam into her quick and rough, one hand over her mouth to keep her quiet while she came on my cock. Another time she dared me to fuck her in the backyard at night. We spread a blanket on the grass and she rode me under the stars, her tits in my hands, whispering how she loved having her brothers cum dripping down her thighs.
The intensity never faded. She loved when I talked dirty backcalling her my filthy little sister, telling her how tight and perfect her cunt felt around me. Shed clench harder every time. We experimented with positions: her on all fours while I held her hips and drove deep; her riding me reverse so I could watch her ass bounce; her sitting on the kitchen counter with her legs over my shoulders while I stood and fucked her standing up.
Even when we tried to cool off, one look or one accidental brush of skin would set us off again. Shed drop to her knees in the hallway and swallow me until I was pulsing down her throat. Or Id wake up to her sliding onto me in the middle of the night, already soaked and ready. We knew it was wrong, but the wrongness only made it hotterthe secrecy, the risk, the way her body responded to mine like it was made for it.
By the end of that summer we had memorized every sound the other made, every spot that made us shudder. We didnt talk about stopping. We just kept finding new ways to get each other off, raw and direct, until the house felt like it belonged only to us and our shared hunger.
