My naked sister always mocks me for being inexperienced with girls. Once again today, she flaunts her naked body in front of me. I feel pathetic, reacting the same way as always, still a virgin. Then suddenly, she surprises me by asking, "Wanna do it?" The sensation of her bare pussy sends my lust soaring, and I lose control, thrusting wildly like an animal. Overcome by desire, I chase after her as she tries to escape, filling her with creampie after creampie—second, third time, again and again. The beast inside me has finally awakened.