I had just turned twenty-two when it finally happened. My sister Emily was twenty-one, home from college for the summer, and our parents were gone for the weekend. The house felt too quiet, too charged. We had always been close, but lately the way she looked at me had changed. That night she came downstairs in nothing but a thin tank top and panties, nipples poking hard against the fabric.
"Can't sleep," she said, standing in the kitchen doorway. Her eyes dropped straight to my crotch. I was only in boxers, my cock already half-hard from the sight of her.
I didn't answer with words. I walked over, grabbed her hips, and pulled her against me. My dick pressed right into her belly. "You know what you're doing," I growled.
Emily smirked and reached down, squeezing my shaft through the cotton. "Been wanting this cock for years, big brother. Mom and Dad aren't here to stop us."
I spun her around and bent her over the counter. Yanking her panties down, I spread her ass cheeks and stared at her shaved pussy, already glistening. "Fuck, you're soaked." I shoved two fingers inside her without warning. She moaned loud, pushing back on my hand.
"Harder.
Finger-fuck your little sister's cunt."
I did. I pumped my fingers fast and deep while my thumb rubbed her clit. Her juices ran down my wrist. When she started shaking, I pulled out, dropped my boxers, and slammed my thick cock straight into her.
Emily screamed. "Yes! Fill me up, brother. Fuck me like you mean it."
I gripped her hips and pounded her. The wet slap of skin on skin filled the kitchen. Her tight pussy gripped every inch of my dick, milking me. I reached around and pinched her nipples through the tank top, twisting them until she yelped.
We didn't make it to the bedroom. I fucked her right there on the counter, then on the floor, then bent over the couch. Every time she came she begged for more. "Cum inside me. I want my brother's load dripping out of my pussy all night."
I gave it to her. The first time I exploded deep in her cunt, holding her down while I pumped rope after rope of hot cum into her. She came again just from the feeling of it.
We barely slept. In the shower I made her suck my cock, watching her lips stretch around the shaft while water ran over us. She swallowed the second load, then turned around so I could take her ass for the first time. She was tight as hell, but she pushed back until I was balls-deep, grunting "Fuck my ass, brother. Own it."
By morning we were sore and sticky, lying naked on the living room floor. Emily's fingers traced my softening cock. "This is just the start," she whispered. "Every time they're gone, we do this again."
I pulled her on top of me, already getting hard again. "Damn right. Now ride your brother's dick like the dirty little slut you are."
She sank down with a moan, and we started all over. No guilt, no stopping. Just raw, filthy incest sex that we both knew we'd never get enough of.
