Would you turn them in?

My wife works midnights. Our marriage has suffered from all kinds of issues over the years and I have 1 foot out the door from what I found in her text messages. A male friend text her ,"so are we on at 3 am" my wife's reply was yes. this guy is a cocaine user. I'm not sure if it was a drug deal or a ual encounter or both. I haven't said a word to my wife about it. She noticed that I seem to be angry at her and I am to say the least. Do I turn this guy in to the police and his employer? Either way I want to get this guy and plan to divorce my wife because she is either a drug user, a tramp or both. I don't want to tell her anything, I want to get them both back for all the lies and deciet. What would you do?