So my friend I have known since kindergarten ( I’m almost 40) married my wife’s sister. Over the past year he has developed what we perceive as an infatuation with my daughter. She is 3. Examples: calls her “my Betsy”, refers to himself as your uncle all creepily,  a picture of her on his dash board, his phone screen saver is her, coming over just to see her and basically ignoring all the adults, trying to face time just to see her everyday, seriously every day. The way he just focused solely on her creeped me out.We have slowly been distancing ourselves from him.  Well this weekend my wife and I had to leave town for the day and we  found out he made plans with my mother in law to come over after we left to spend time with my daughter(MIL was baby sitting).  I only found out because I heard him call and ask MIL if we were still there, we left late.. So he’s basically going behind our backs to see her. Also over the past year his hygiene has gotten awful. He smells so bad he literally ruined my couch and when he would hug my daughter it would leave his BO smell on her. It’s just fucking strange.   So I called him out for his creepy behavior and going behind our backs to see my daughter and he got immediately got defensive and went to the extreme of saying I was accusing him of being a child molester. Sister in law freaked out and says she won’t talk to us anymore. My wife is pretty upset because she might lose her sister over this. I confided in one friend that’s known him just as long about his behavior and he agreed it was not appropriate.   Well AITA? Should I have kept my mouth shut?