One day, my father brought a new woman home. After my mother passed away, he raised me all on his own. It seemed he was getting serious with Yuka and planning to marry her. Soon after, Yuka moved into our house, and her unconscious erotic charm became an intense temptation for me, a sexually inexperienced teenager, making each day agonizing. Then one day, I accidentally witnessed my father and Yuka having sex. I stood frozen, overwhelmed by tension and excitement, staring intently—until our eyes met. That night, with my father away on a business trip, it was just Yuka and me at home. Knowing I was still a virgin, she approached me with her glossy, wet hair flowing after a bath, smiling as she kissed me. Her tongue gently intertwined with mine, and I couldn't resist—my cock instantly hardened. She teased it slowly, stroked it, sucked it, then mounted me, riding fiercely and draining every drop of my cum. Overcome by pleasure so intense I nearly blacked out, I lost all control. Before I knew it, I had been fucking her relentlessly all night long—the insatiable, sexually ravenous stepmother—until the morning sun rose.