I have never been through a divorce so I have no idea of the legal ramifications so here goes.
True story:
My friends wife leaves him to have a lesbian affair (they have since gotten back together) she was gone for over a month so the idea of divorce was kicked around.
Question #1
If you can prove your spouse committed adultery does that put you at a significant advantage in the divorce proceedings (they own a house)
Question #2
Is a woman having a lesbian affair considered adultery?
This should be interesting 
and yes our kinky friends have already suggested threesomes however my friend is very conservative in that area.
But seriously you legal eagles out there, if she left him to go live with someone else would he get to keep the house?