Seriously what's the end result, what have you achieved ?
What was the point to it all, did you want to lose your integrity, your respect, your reputation, your marriage.
I guess you didn't, so why have you given your power to this man, handed him on a plate the ability to destroy your life. You don't really know him, this is information even if you ended it today that could come and bite you on the bum at ANY time in the future.
Imagine in ten years time, your husband, friends and children knowing.
He will always have this over on you and your husband.
Big risk, if you're going to chuck your stability away make sure it's at least with someone who you want to rip the family up for, to escape.
This man is a shit, shagging his friends/colleagues wife, why have you allowed him to pull you down.
It's not special, it's tawdry, unremarkable and predictably boring, we can all do it, if we wish, we just don't, not many of us want to sabotage our own future for nothing.
The only interesting point of all this is how quickly it took him push your defences down .......
in no time at all.