Ultimately you're talking about breaking up two people who have probably lived together for some time and working out a sharing agreement with two people who don't really want to be around each other anymore. It's hard to imagine a scenario where there isn't friction or hurt feelings in this case.

Best case scenario the couple wasn't married very long and doesn't have much in the way of joint possessions and no kids and they both work so you don't have alimony concerns you still need to decide who has to move out.