ERC, I know what you mean about them working with OP. In my case she is his secretary. We are separated so she sees him far more than I do. She sees him everyday. He tells me they are not seeing each other outside of work, but it's hard to believe him because of the lies he has told me in the past. It absolutely drives me crazy. I'm like you I don't know how they can get them out of their systems being around them all the time!
I keep hoping our history together will wake up our spouses! Right now I'm trying to stay upbeat and be his "friend". I just try to communicate with him about the girls on friendly basis. I know he learns more about the girls from me than he would on his own. But I don't call him much and then it is a valid reason. If they can't love us now, maybe they can "like" us.
Life's challenges are not supposed to paralyze you, they're supposed to help you discover who you are. -- Bernice Johnson Reagon