One of the things that really seemed to strike home for her was could she ever truly trust her OM in a relationship since he knowingly got involved with a married woman.
I find this very interesting because I think the same thing. I wonder why any man would want to be with a woman who encourages him to cheat on his W and walk out on his family. Really? Is that who you want to build a life with?
As far as handoffs go, H and I get along just fine so I don't personally have that issue, but I agree with raliced. Gut it up and be pleasant for the sake of the kids. I suspect it will get easier with time.