How incredibly selfish and self centred. What, is it all about you?
You don't give a f**k about his wife & kids, but you feel you should? You want to pretend you care, even if you just really don't?
You want to be bonk buddies with him, and hope that you can take him away from his wife and kids?
You want to hurt his wife, have his family split up, and do that to the kids?
You want to be with a man you can never trust (because anyone that does this once, does it multiple times), and who will never trust you (because anyone who does this with a married man, has no qualms about doing so when she herself is married)?
Seriously woman, grow a brain, stop thinking with what's between your legs, and find someone who's single.