A while ago, the DP of a good friend of mine slept with a prostitute. Not that there's ever a 'good' way to do that, but without going into too many details, the way he did it was particularly cruel. Of course, afterwards he was contrite to all hell, begged her forgiveness, etc.
I have been trying to support her in coming to terms with what happened without going on about what a shit he is and hoped she'd come to the conclusion to leave him, particularly as they don't live together and have no DC. She is young and has plenty of opportunities to meet someone lovely who respects her and their relationship (and women generally).
During this time she specifically asked me not to tell my DH. I know it's wrong that I went against her wishes but I needed his support too. I'm aware that this was a bad thing to do but I didn't think it would become an issue.
Unfortunately she's decided she wants to stay with him. I would love to say I never want to see the bloke again but I feel like that, if this is the decision she's made, I should respect it and not 'punish' her by applying my own feelings to the situation.
She has asked if we can go out to dinner, the 4 of us, and that I can treat this as a fresh start between them. DH really doesn't want to go or spend any time in the presence of her DP. Without the loyalty to my friend that I have, he's said he will find it very hard to spend any time with someone who has behaved in this way. He's said that if I really want him to, he'll do it, but I know it's unreasonable of me to ask him to be in a situation he feels uncomfortable with.
I don't really know what to do. If she does stay with him I can't keep avoiding dates/saying DH is busy, and equally I don't think it's fair to her after all she's been through to make her feel like she can't have dinner with her friends. Equally I don't want to ask DP to spend time with someone when, if the shoe was on the other foot, I wouldn't want to either.
I'm guessing I have to tell her that he knows and take the flak for that, but how can I manage this situation without hurting her further or asking DH to compromise his relatively admirable morals.