We need to have a chat. Of course I love it when you stroke your cock for mummy, but you need to learn some control now. You can't just think about mummy every time you masturbate or fuck one of your girlfriends. Mummy wants to teach you to discipline yourself, the physical kind of discipline. Yes it might hurt, but don't worry darling mummies here and she will make sure it's all worth while, why don't you take that hard cock out of your pants and start right now....mummy will talk you through it