I slammed the door behind me and there she was, my little sister, standing in the middle of the living room in nothing but a tiny tank top and panties. We were both way past eighteen, but that didn't stop the filthy heat that always hit me when I looked at her. "Fuck, Jess," I growled, dropping my keys. "You been walking around like that waiting for me?"
She turned, nipples already hard under the thin fabric. "Took you long enough, big brother. I got wet just thinking about your cock." No teasing, no slow dance. She yanked the tank top off and her tits bounced free, full and perfect. I was on her in two steps, grabbing her ass and yanking her against my hardening dick.
"Been thinking about this all day," I said, voice low and rough. I shoved my hand straight down her panties and found her soaked. Two fingers slid right into her tight cunt. She moaned loud and pushed her hips forward. "Yeah, that's it. Soak my hand, sis."
Jess reached for my belt, ripping it open. "Give it to me. I want that thick brother cock in my mouth first." She dropped to her knees on the carpet and hauled my jeans down. My dick sprang out, already leaking. She didn't hesitate, just opened wide and swallowed half of it in one greedy gulp. Wet, sloppy sounds filled the room as she bobbed, spit running down her chin and onto her tits. I grabbed her hair and fucked her throat deeper. "That's right, take it all. Good little incest slut."
She gagged but kept going, eyes watering, tongue working the underside. When I pulled out she gasped, strings of spit connecting her lips to my shaft. "Fuck me already. I need it raw."
I hauled her up, spun her around, and bent her over the couch arm. Her panties came down in one jerk. I lined up and drove straight into her pussy in one hard thrust. She screamed, that perfect mix of shock and pleasure. Her cunt clamped down hot and tight around me. "Goddamn, you're always so wet for your brother," I snarled, pounding her deep and fast. Skin slapped loud. Her ass rippled every time I bottomed out.
Jess pushed back, meeting every stroke. "Harder. Fuck me like you mean it. Fill your sister's cunt." I reached under and rubbed her clit in rough circles. She came fast, legs shaking, juices running down my balls. I didn't slow down. I kept slamming, chasing my own edge.
We moved to the floor. She climbed on top, sank down on my cock again, and rode like she was starving. Her tits bounced in my face. I sucked one nipple hard while she ground her clit against me. "Tell me how much you love fucking your brother," I ordered.
"I love it," she panted. "Love your big dick stretching me. Love that it's wrong. Cum in me. Do it." Her walls fluttered again and she came a second time, nails digging into my chest. That pushed me over. I grabbed her hips, held her down, and unloaded deep inside her, pulse after pulse of thick cum flooding her pussy.
We didn't stop there. She slid off, turned around, and sucked me clean, tasting both of us. Then I flipped her onto her back, spread her legs wide, and ate her out, licking my own cum from her dripping slit while she moaned and pulled my hair. When I was hard again I fucked her missionary, slow and deep at first, then brutal, her ankles on my shoulders. Every thrust made wet squelching sounds from the mess inside her.
Later we moved to the shower.
Hot water ran over us while I bent her against the tiles and took her ass for the first time, working my cock in slow until she was begging for more. She came again with my fingers on her clit and my dick buried to the hilt in her tight hole.
By the time we collapsed on the bed, sweaty and spent, cum leaking from both her holes, the sun was setting. Jess curled against me, one hand lazily stroking my softening cock. "Same time tomorrow, big brother?"
I kissed the top of her head. "Count on it."
