I realize I misread your question. YES, gather enough evidence NOT ONLY so you can finger him, but that you can prove an A. Phone records? Internet?
I wasn't a fan of the outing earlier. In general, I think that the cheater got to that point for a reason, and that you should live and let live and not destroy someone (petty) if it's too far gone. But I've reached a different opinion based on how she has behaved recently and based on how she speaks about you with your D.
It is only because of your D that I'm feeling like it's time to out this. So that you are in a good position.
