2 dogs male and female (mother/son)

Question
My male is almost 2 years old and is continuously trying to mate with my female (almost 4 his mother).  He is obsessing to the point of making himself sick. MY female is fixed and not interested in his pursuit. She and he both are becomming more agressive and I do not want to have him fixed for stud purposes in the future. PLease help, I have spent too many nights awake and hate to see "my kids" unhappy

Answer
Rachele, I would let the female dog put him in his place if she is trying to do so (you said they were becoming more aggressive, so I'm assuming she is). Since she is spayed, there is no chance of them actually breeding, so let her tell him off. You also need to back her up by correcting him whenever he tries to mount her.

If you don't mind me asking, what breed is he, and what makes you think he's worthy of being bred?