Mom dies and later the stepson finds out his stepmom might have murdered her and starts to accuse her. The stepmom tries to blackmail him by threating to tell everybody about the things in his journal which describe him spying on people having relations. She tells him to move out and he does, then he start spying on a girl having sex and starts to develop a relationship with her.

Hallam Foe (http://en.wikipedia.org/wiki/Hallam_Foe)

Thank you so much for the help.

You're very welcome.