C.T.
Imagine your son was four years old and doing the same thing, how would you react? Handle the situation the same way now. He is a teen trying to find his identity. Any strong negative reaction will not lead to a positive outcome for either of you. If it turns out your son's sexual quirk is wearing ladies clothes be happy for him, there are a lot worse things out there than cross-dressing. Relax and love your son. He is probably just going through a phase. Even if he is not, he is still your little boy and needs your love and support always.
C..