She was already naked on my bed when I walked in, legs spread, fingers rubbing her slick clit like she owned the place. "Lock the door, bro," she said, voice low and nasty. "Mom and Dad won't be back for hours."
I didn't need telling twice. I stripped fast, my cock already hard and leaking. She pulled me down on top of her, grabbed my dick, and shoved it straight into her tight cunt. No teasing, no slow shit. Just raw fucking. Her pussy gripped me like a fist as I slammed in balls-deep on the first thrust.
"Fuck yes," she hissed. "Pound that sister cunt."
I fucked her hard, the bed creaking under us. Her tits bounced with every thrust. She wrapped her legs around my waist and clawed at my back, moaning loud and filthy. "Harder. Make it hurt. Fill me up with that brother cum."
We were so into it we didn't hear the car pull in the driveway. Didn't hear the front door. We were both close, grunting and sweating, her pussy making wet slapping sounds every time I drove in.
Then the bedroom door swung open.
Mom stood there frozen, keys still in her hand. Dad right behind her. Their faces went from shock to pure rage in one second flat.
"What the fuck are you doing?" Dad roared.
I froze mid-thrust, cock still buried in my sister's dripping hole. She didn't even try to cover up. She just looked at them with a defiant little smirk, like getting caught with her brother's dick inside her was no big deal.
"Jesus Christ," Mom whispered, eyes locked on where we were joined. "She's your sister."
My sister laughed, low and dirty. "Yeah, and he's fucking me good. You want a turn watching or you gonna leave?"
Dad stepped forward like he was going to drag me off her. "Get the hell out of her right now."
But my sister tightened her legs around me and rocked her hips. "Don't you dare pull out. Finish what you started."
The tension in the room was electric. Mom and Dad stood there staring, unable to look away. My cock twitched inside her despite everything. I started moving again, slow and deliberate, letting them see every inch sliding in and out of her soaked pussy.
"You sick fucks," Dad muttered, but his voice had gone hoarse.
Mom's hand was gripping the doorframe so tight her knuckles were white.
My sister moaned louder on purpose. "That's it, bro. Fuck me while they watch. Show them how deep you go."
I slammed into her harder, the wet sounds filling the room. She came first, cunt pulsing and squeezing, juices running down my balls. I followed right after, pumping thick ropes of cum deep inside her while our parents watched every twitch and spurt.
When I finally pulled out, cum leaked out of her stretched hole and onto the sheets. She spread her legs wider so they could see it all.
"Get out," Dad said finally, voice shaking. "Both of you. We'll deal with this later."
We grabbed our clothes and walked past them naked, her hand in mine, cum still dripping down her thigh. As we hit the hallway she leaned in and whispered, "Next time we leave the door open on purpose."
The door slammed behind us. We didn't stop smiling.
