What would be the best way to handle this situation?

[Rosalie]

Well, first of all, you should consider posting under something that is not your real name, if that is- because people can find you on the internet. It's not safe. In addition, don't give your friend's name either.

As for the rest of the mess, block this guy on your phone, your FB, everything, and put some distance between you. He is a cheater, and even if he is by some miracle separated, he isn't what you want to be near. Cheater, cheater, cheater, and he clearly has no concept of what it is to be good and true to anyone. You don't need to be involved with that.

If you happen to see him in town again and he asks, tell him you don't involved yourself with married men. DOn't let him explain, just tell him you're not the least bit interested, and walk away. If he keeps coming back, report him to the police.

As for your friend, there is no such thing as "casually" seeing a married man. You're either seeing a married man or you're not. It's up to her as to whether she does this, has any standards, owns a brain - but if you are a friend, tell her there is nothing promising in it, because if he is doing all of this to his current wife - which he does still have- he WILL do it to the rest of the women he charms. *YECH*