I still remember the exact moment I decided to seduce my cousin. It was the summer I turned nineteen, the weekend our families rented the lake house again. Mark was twenty-one by then, home from his first year of college, all broad shoulders and quiet confidence that made my stomach twist every time he looked at me. We had grown up together, shared bunk beds on family trips, but something had shifted.
I was no longer the little girl who followed him around. I was a woman who knew what she wanted, and what I wanted was him.
That first night, after everyone else had gone to bed, I found him on the back deck nursing a beer. I wore the thin white tank top that barely covered anything and shorts that rode high on my thighs. I sat close, letting my bare leg brush his.
"You've been staring at me all day," I said softly, not accusing, just stating the truth.
Mark's jaw tightened. "You're my cousin, Sarah."
"I know," I answered, leaning in so my breath touched his ear. "That doesn't stop me from wanting you."
He didn't pull away. That was all the permission I needed. I placed my hand on his thigh, feeling the muscle tense beneath my fingers, and slowly slid it higher. When my palm cupped the growing hardness in his jeans, a low sound escaped his throat. I kissed him then, slow and deep, tasting the beer on his tongue. He kissed me back like a man who had been holding back for years.
We didn't go all the way that night. Instead I took his hand and led him down to the boathouse. Inside, moonlight spilled across the old wooden floor. I pulled my tank top over my head and let him look. My nipples were already tight. I stepped out of my shorts, standing naked in front of him, and whispered, "Touch me."
Mark's fingers were careful at first, tracing my breasts, my waist, the curve of my hips. When he finally slipped two fingers between my legs, I was already wet. He groaned at the discovery and stroked me until my knees shook. I came against his hand, biting his shoulder to stay quiet. Afterward I dropped to my knees and freed him from his jeans. I took him into my mouth slowly, learning the weight and taste of my cousin, savoring every inch until he spilled down my throat with a muffled curse.
The next day we played it cool around the family. But every glance between us crackled. That afternoon I "went for a swim" and he followed ten minutes later. We met behind the big oak at the edge of the property. I wore only my bikini bottoms. He pushed me against the tree, yanked the fabric aside, and slid inside me for the first time. It was fast, desperate, my back scraping bark while he thrust deep. I came hard around him, nails digging into his back, and he followed seconds later, pulsing hot inside me.
We spent the rest of the weekend finding every hidden corner. In the shower after everyone left for town, I rode him slowly under the spray, water running between our joined bodies. In the kitchen late at night I bent over the counter while he took me from behind, one hand over my mouth to keep me quiet. Each time felt more natural, more inevitable. The taboo only made it hotter.
By Sunday night the house was empty again. We had one last hour before our parents returned. I led Mark to the bedroom I was using and locked the door. This time we took it slow. I let him explore every inch of me with his mouth and hands. He licked and sucked until I was trembling, then I pushed him onto his back and sank down onto him. I moved with deliberate rolls of my hips, watching his face, telling him exactly how good he felt inside me. When I came, it was long and deep, my body clenching around him. He flipped us, drove into me harder, and finished with my name on his lips.
Afterward we lay tangled together, sweaty and breathless. I traced circles on his chest and whispered, "This doesn't have to end when the weekend does."
Mark kissed my forehead. "I don't want it to."
We kept our secret through the rest of the summer and into fall. Every stolen weekend, every late-night drive, every time I seduced him all over again felt like coming home to something I had always needed. The guilt never fully left, but the pleasure always won. And every time I looked at him, I knew the girl who had started it all had gotten exactly what she wanted.
