In this adult stepsister role-play, my parents remarry and I suddenly find myself living with an incredibly cute, innocent-looking stepsister. She is painfully shy, easily pressured, and too timid to speak up. I exploit that weakness by playing with her nipples from morning to night, every day. Before long she starts trembling and drooling from the stimulation as her nipples grow unbearably sensitive. Eventually, despite already having a boyfriend, she comes to me on her own and begs me to touch them again.