Trusting, Just remember to keep it friendly-business-like and not cold or cool.
I was thinking that your situation is most interesting in some respects. Your H has taken great pains to hide the OW and keep her out of certain key parts of his life. When you think about it, that simply cannot continue. He can't fake it forever!
M: 16 years Bomb 4/07 OW 20s long gone Divorced 11/09 I remarried New Guy Cooperative r w/X regarding D