Well if she was in an open marriage...then I don't see all the fuss. Surely the entire idea of an open marriage, or open relationship for that matter, is that you're permitted to have other sexual partners and partners of some kind outside of your marriage/relationship, but all the while you are both there for each other when, basically, not copping off with someone else?
So...what's the problem? If that's what kind of marriage it was, then why the fuss? Unless I'm missing something here, I'm not fully clued up on this story as I said