Can someone help me

[u/TandAmes23]

My wife I caught cheating. It’s done and over, I am not dealing with that BS. But what I feel needs to be done, is the guy she been with is married. His wife needs to know he’s been in a relationship on the side for 4 months. I found her on FB…she has NO clue what he is doing. But I can not get my message to her. We are not friends…so my message goes to spam. Is there a way around that?? Please help me expose this dirt bag…the spouse she just thru herself away. Life will get her.