My step daughter have always been close so I could never do her wrong. I now feel she is doing me wrong. I have seen her naked and half dressed on many occasion without thinking of her sexually. Now she is really blossoming and I catch myself thinking wow all too many times. That's fine until lately. The latest thing is the sounds I hear from time to time. She is masturbating and making me all hard. I want to ask her to her to keep it down but I cannot let her know I know even though a part of me thinks she is doing it to tease me. I only hear her when her mom is not at home. I definately dare not tell her mom who surely knows. I often masturbate to the sound of her masturbating. I am bugging out over possibilities.