We hadn't seen each other in two years when the family reunion hit that summer. I showed up at the lake house and there was my cousin Jess, 23 now, standing by the dock in cutoff shorts that barely covered her ass. We'd always been close growing up, too close sometimes, with those long looks and accidental touches that went on a beat too long. She was an adult, I was an adult, but blood still made it dirty.
That first night the whole crew got drunk on the porch. Jess kept brushing against me when she reached for beers. "You look good, cuz," she said low, right in my ear. Her breath was hot. I felt my cock twitch in my jeans. By midnight most people crashed. Jess grabbed my hand and pulled me toward the boathouse. "Come on.

Let's talk."
Inside it was dark and smelled like old wood and lake water. She didn't waste time. "I've thought about this for years," she said, yanking her tank top off. No bra. Her tits were full and heavy, nipples already hard. "Fucking my own cousin. Makes me wet just saying it."
I shoved her against the wall and kissed her hard, tongue deep. My hands grabbed her ass, pulling her tight against my hard cock. "You're a filthy little slut for your cousin," I growled. She moaned and ground on me. I spun her around, bent her over the old workbench, and ripped those shorts down. No panties. Her pussy was shaved smooth and already dripping.
I dropped my pants and slapped my cock against her ass. "Beg for it," I told her. "Tell me you want your cousin's dick."
"Fuck me," she panted. "Shove that cock in your cousin's cunt right now."
I slammed in balls deep on the first thrust. She was tight and soaked. We both groaned loud. I didn't go slow. I fucked her raw and fast, hips slapping, the bench creaking. Her pussy gripped me every time I pulled back. "This is so wrong," she gasped. "My cousin's cock stretching me open." That only made me pound harder.
I reached around and rubbed her clit while I drilled her. She came quick, legs shaking, pussy pulsing around my shaft. "Don't stop," she begged. I kept going, sweat dripping, the wet sounds of her cunt filling the boathouse. After a few minutes I pulled out, spun her, and lifted her onto the bench. She spread wide and I drove back in, watching her tits bounce with every thrust.
"Fill me up," she said, eyes locked on mine. "Cum in your cousin's pussy. Give me that creampie."
I lasted maybe thirty more seconds. I buried deep, cock throbbing, and unloaded. Thick ropes of cum pumped straight into her. She clenched around me, milking every drop. When I finally pulled out, white cum leaked from her stretched hole and ran down her ass. She reached down, scooped some on her fingers, and licked it off. "Tastes like family," she smirked.
We didn't stop there. She sucked me hard again while I fingered the mess in her cunt. Then she climbed on top, sank down on my cock, and rode me slow and dirty, grinding her clit against me. "I want another load," she whispered. "Deeper this time." I grabbed her hips and thrust up, pounding her from below until I came again. More cum flooded her, overflowing and dripping out around my shaft.
We fucked twice more before dawn. Doggy on the floor, her face pressed to the boards while I railed her and called her my cumslut cousin. Missionary on the old couch, legs over my shoulders so I could watch my cock disappear and watch the creampie form when I pulled out. Each time I finished inside her. By the end her pussy was a sloppy, cum-filled mess, lips puffy and shiny, my seed leaking every time she moved.
The next morning at breakfast she sat across from me, shorts back on, but I knew she was still full of me. She shifted in her chair and gave me that look. We snuck off twice more that weekend. Same raw, no-pretense fucking. Cousins using each other, no protection, just hot loads pumped deep where they didn't belong.
On the last night she made me promise we'd do it again at the next reunion. "Next time I want you to fuck me in the main house," she said, cum still seeping from her as she pulled her shorts up. "Riskier. Dirtier."
I left with her scent on me and the memory of her cunt overflowing. Cousin incest creampie sex never felt so fucking good.