The old oak table in the attic smelled of dust and forgotten paper when I spread out the family tree that night. My name, Jake, sat at the bottom branch, twenty-five and restless after too many lonely years. Up the lines it went, names blurring until I hit the faded ink for my aunt Lena and uncle Marcus, their lines crossing back to my own parents in a way that made my cock twitch before my brain caught up. They weren't distant cousins. They were full siblings, just like the handwritten note in the margin said: "Our secret kept the blood hot."
Lena found me there, her robe slipping open as she leaned over my shoulder. "You weren't supposed to see that yet," she whispered, her breath hot on my neck, tits pressing against my back. She was forty-eight, thick hips and heavy breasts that swung free under the silk, nipples already hard. I turned and grabbed her, pulling her onto my lap so her wet cunt ground against my jeans. "Tell me the truth," I growled, yanking the robe off. She moaned and spread her legs wider, guiding my hand between them.
Two fingers slid into her slick folds easy, her clit swelling under my thumb while she rocked.
"Fuck, your father and I started it when we were your age," she confessed, voice raw. "Marcus joined later. The tree shows it all, every dirty fuck that kept us close." She unzipped me, pulling my thick cock free, stroking it with both hands until precum leaked over her knuckles. I stood, bent her over the table, and slammed into her from behind. Her pussy gripped me tight, hot and dripping, the slap of skin echoing as I pounded her. "Harder, nephew," she begged, pushing back to take every inch. I reached around, pinching her clit while my balls slapped her ass, her juices running down my thighs.
Marcus walked in then, already hard, his own cock out and stroking. He was fifty, broad and rough, and he didn't hesitate. He fed his dick into Lena's mouth while I fucked her cunt, the three of us moving like we'd rehearsed it. She gagged and slurped, spit dripping onto the family tree papers, smearing the ink of our shared bloodlines. I pulled out, flipped her onto her back on the table, and drove back in, watching her tits bounce with every thrust. Marcus climbed up, straddling her face so she could tongue his hole while he jerked off over her chest.
We switched. I took her ass next, lubed only by the mess from her pussy, stretching her tight ring while she screamed and came, squirting across the floor. Marcus slid into her cunt from the front, our cocks separated by nothing but the thin wall inside her, rubbing together through her body. "Fill her up," he grunted, and we both unloaded, thick ropes of cum pumping into her holes until it overflowed and ran down her crack. She came again, clenching and milking us dry.
Later, sprawled naked on the attic floor, Lena traced the family tree with a cum-smeared finger. "Your sister arrives tomorrow," she said, smiling. "The branches just keep growing." My cock stirred again at the thought, already planning how we'd add another line to the chart. The night stretched on with more fucking, raw and relentless, every thrust rewriting the tree in sweat and seed.
