Caught my son spying on his mom, what should i tell him?

3 nights ago,i came home from work early,and i saw my son hurriedly coming from our backyard.i got curious and went there which was very dark and a chair was suddenly placed under the window i stood up the chair and saw my wife through a gap in the blinds taking a shower.so what else might he be doing there at that moment? i felt bad knowing that he might be spying on his own mom and thinking of ual thoughts,i felt mad and bothered at that time but i dont know how to confront him.is it normal for his age to have an oedipal complex?how could i tell him to stop it if he was doing it?does it have to do with my wife having a huge bossom?cause she's his mom and is awfully disrespectful.my son is only 14,yet my suspicion may be wrong.what should i do? thanks