Peeping neighbor.

Last night I was in my room undressing and didn't realize my shade was opened a little and when I looked over I noticed my neighbor in his bedroom looking at me ( didn't really bother me he's HOT) but then he left right away he only seen me from behind only so just ass and back but now today he can't even look at me I think he's embarrassed that I caught him looking. One other think is he's married (but they are on a trial separation and they have kids, as do I.)