What should I do ?

So it's this guy he's married I'm married he speaks to me all the time and I'm in love with his dog but I never payed attention to him like that but anyway today he was talking to me and ask me a random question do I like my ass ate I looked at him like he was crazy I said what did you say to me he said of you do I'll do it for you I told him he should be ashamed of himself he's wife is pregnant with his child and my heart goes out to her I want to tell her but I don't want to stress her out my cousin just had her baby four months early because of stress should I just tell her it's hard to advoid him because we live in and apartment complex and I don't wanna ruin any ones family