As explained in Season 1, episode 17 of Crazy Ex-girlfriend:
Well, you sleeping with my ex hurts my feelings, but it’s okay if it’s love. It’s the “meant to be” exemption. Like, Woody and Soon-Yi are still together, so that, like, kind of makes it okay.
I’ve often wondered if that’s true for our ex-spouses; like is it better or worse that our relationship actually worked out?