<human>: I also posted this on /r/advice , but thought here would be a good place too.

I met someone through Craigslist, he is older and I am attracted to older guys, and he has a thing for younger girls. We chatted on and off and went on a coffee date. He said he was divorced. He then stood me up a couple times and I was very upset because I am a busy person and it was a waste of my time/money and being stood up is upsetting in itself. He came up with lame excuses and kept apologizing. I deleted his number.

I looked him up in Facebook because I felt something was wrong. I found out he is married to a woman his age who is gorgeous. From very recent posts , pictures and such is obvious they are STILL married and are a happy family.

He is obviously a sleazy ball, but I had deleted his emails and texts. I saw his ad pop again on Craigslist. Should I tell his wife? Should I message her through Facebook? She is a yoga instructor in a studio in town and he owns a very profitable business with clients across the country.

I've debated telling his wife because of his kids, and because I feel awful. Also, I don't want to get too personally involved, but I think I already am. He did mention that he always deleted his texts when he got them, which I found weird but its obvious why now.
Should I tell her? If so how? How can I gather proof? After all Craigslist ads are "anonymous"...

Also to CLARIFY: I stopped all contact and block his # after I found the posts. He doesn't know I know. I was too disgusted.

Can you give me a shortened version of the text?
<bot>: Should I tell wife of guy I met on Craigslist (who I thought was divorced) that he is cheating on her through Craigslist? How should I go about it?