Across the back garden where i live, there is a young girl about 17, who constantly sunbathes in a very skimpy

bikini. i can see right into her garden from my back bedroom and i have to admit that i sometimes watch her and masturbate, and i feel like a pervert. i am a 42 year old married guy. do you think i am behaving badly and could i get into trouble with the police over this. no one can see me as i have the curtains closed and look through a small gap in them