I am with Saffie on this one... giving away your hand and telling this guy everything you have and giving him an excuse to run is playing right into his hands.
Challenge him I say.. Stick close to family and his kids and just talk like he's still cheating... don't tell him anything that you know.. just engage in conversation as if you know... and focus getting your own life in order... do NOT support his kids.. leave responsability for him to deal with...
Protect yourself.. that is number ONE on the to DO list.
Exposing to his kids may shake him up a bit... and putting OWH in the loop too... but confronting H? Nope, just IGNORE him and work around him I say...
