I had just turned twenty-two when it started. My stepsister Mia was nineteen, home from her first year at college, and the house felt too small for the three of us. Dad worked nights. That left Mia and me alone after dark, the air thick with everything we had never said out loud.
She walked into the kitchen wearing nothing but an old T-shirt that barely covered her ass. "You gonna stare or you gonna help me with this?" she asked, holding up a jar of pickles like it was nothing. I twisted the lid off, handed it back, and our fingers brushed. She didn't pull away.
"Fuck, you're hard already," she said, eyes dropping to my shorts. No teasing, no slow build. Just straight talk. "I saw you jerking off last night. Door was cracked. You were thinking about me, weren't you?"
I didn't lie. "Yeah. Every night since you got back."
Mia set the jar down, stepped closer, and grabbed my cock through the fabric. "Then stop wasting time. Show me." She yanked my shorts down right there on the kitchen floor. My dick sprang out, thick and already leaking. She wrapped her hand around it and stroked once, rough and direct. "Bigger than I thought. Good. I want it deep."
She dropped to her knees and took me in her mouth without another word. Wet, hot, no hesitation. Her tongue worked the underside while she sucked hard, spit running down my balls. I grabbed her hair and fucked her face, pushing until her nose pressed against my stomach. She gagged but didn't stop, just looked up with watery eyes like she wanted more.
When she pulled off she stood, stripped the T-shirt over her head, and bent over the counter. "Fuck me. Now. No rubber. I want to feel every inch."
I lined up and shoved in. She was tight and soaked, gripping me like she had been waiting for this exact second. I pounded her hard, skin slapping, the counter digging into her hips.
Mia moaned loud and filthy. "Harder, brother. Wreck that pussy. It's yours now."
I reached around and rubbed her clit while I slammed into her. She came fast, cunt pulsing around my cock, juices dripping down her thighs. I didn't slow down. I kept fucking her through it, chasing my own release.
"Fill me up," she panted. "Give me that load."
I buried myself to the hilt and came, pumping thick ropes deep inside her. She pushed back against me, milking every drop. When I pulled out, cum leaked down her leg. She scooped some with two fingers and licked them clean.
We didn't talk about stopping. That night became every night. Mia would come to my room after Dad left for work, climb on top, and ride me until we were both shaking. Sometimes she made me eat her first, sitting on my face while she sucked me off. Other times she bent over the couch and told me to use her ass. She liked it rough, liked when I called her my filthy little sister while I stretched her open.
One afternoon she brought a friend home. The friend was twenty-one, curious, and Mia told her straight: "Watch if you want, or join. He's good." The friend watched first, then stripped and let me fuck her while Mia sat on her face. We kept it going until all three of us were wrecked and sticky.
Mia and I never pretended it was anything but what it was. New. Dirty. Ours. Every time she walked past me in the hall she would grab my cock and whisper, "Later. I want more." And I always gave it to her.
By the end of that summer we had fucked in every room, every position, every way we could think of. No guilt, no slow romance. Just raw need and the knowledge that we could have each other whenever we wanted. Mia would text me during the day: "Come home and fill me." I would. We never ran out of ways to make it dirtier, never ran out of hunger for the next time.
That was our new normal. Incest sex stories don't need more than that. Just two adults who decided to take what they wanted and keep taking it.
