Trust me, I get the whole "Why should I be the one to move out??" thing, but unless it's an ongoing affair or it's one spouse wanting to end the marriage and the other doesn't, why SHOULD she be the one to move out?
Puppy
In this case, because the alternate lodging is HER parents. If that is the only option, financially .... it really should be her. IMHO, but of course YMMV.
"Show me a completely smooth operation and I'll show you someone who's covering mistakes. Real boats rock." -- Frank Herbert