Mr Bond - I agree that people CAN change. We all here are proof. But in order to change, people have to have INSIGHT, have to take RESPONSIBILITY, and have to WORK at it.
What has her husband done besides beg once he found out his fantasy woman wasn't all that? I'm not hearing anything about him going to counseling to fix his problems, paying for OW to live in a motel until she can get her act together (or him sleeping on a friend's couch until she's gone), he's not even behaving as if he respects Anyhope's boundaries at all.
AS for him becoming a family man - yes, anyone can change, but the odds that someone with the total lack of character to have flaunted this affair in the ridiculous way he did, will somehow develop the kind of character that leads to a man being a really solid family man, are slim to none. By the age of 40, if a guy hasn't grown up, he's probably not going to. I'm not hearing anything that sounds like a guy growing up here.