We have a teenage daughter and three sons slightly older than that.  The sons are quite problematic, and have a lot of brushes with the law, and pretty toxic attitudes.  Totally unhelpful and unreliable.  Our daughter is just the opposite: smart, funny, helpful and nice.  She is a very beautiful young lady but her growth was stunted for some reason, and at age 19 she is only 4'6" and 66 lbs. -- everything is in correct proportion by she's very, very tiny and stick-thin.   The thing that's odd is that for two years she has been dating a much, much, much older man.  There's nothing in particular that he has done bad; he has visited our home and everything was very normal.  But he's in his late 50s, tall, and although he's clearly smart and likable, I just don't know.  He's divorced and has a son in his early/mid 20s.   The problem is that our daughter is _completely obsessed_ with this guy who's basically three times her age.  She has no problem making dance videos for him or talking romantic and slightly dirty with him even if we're right there next to her.  She got, at her own expense, a tattoo of his name on her lower back.  Clearly they have been extremely sexually active for at least the last year or so.  She has tons of pictures of him on her walls and on her phone.   I have told her to watch out for older men trying to manipulate her but she is right back at me: "Why?"  "What did he do wrong?"  "I love him more than anything in the world and I don't care what anyone thinks."  "We are a perfect couple even with the age difference."  On the one hand it seems like a totally stable relationship, but I'm sure most of you would agree that that's just way wayyyyy too much of an age difference. It's not a so-called "daddy issue" thing; her relationship with my husband/her father is just fine.  She is very sweet to him and causes no problems.    I am having trouble articulating to her why dating such an old guy is a bad idea.  Any assistance would be greatly appreciated.    ... View more