Since you asked, I have sort of a funny story.......
I have a friend who's wife cheated on him with one of his close friends. Funny thing is, at the exact same time, coincidently, my friend started cheating on his wife with one of her close friends. My friend's wife ended up leaving him for the other guy. But, while this news was shocking to him, my friend was relatively okay with it since he and his wife's close friend could start being open about their relationship and further it.
My friend's wife (now ex-wife) stayed with the other guy for only a few months. But, my friend is still with his ex-wife's close friend. And, everybody still remains friends. My friends current g/f and ex-wife hang out together and whatnot. And my friend still hangs out with the other guy.
Moral of the story; Life is just one big fucked up mess.