Ever since my girlfriend dumped me because my cock was too big for her, I have worried that I would never be able to finish sex with a woman. My adult stepsister mocks my misery, but she is also intensely curious about my size. Faced with my massive cock, her desire swells until her pussy aches for it. When I see the hunger in her eyes, I lose control and force my huge cock into her tight hole. Soon she is wearing an ecstatic expression and cumming repeatedly.