If shes ONLY staying with him for the money than thats just fucked up, shes probably confused and just going along with it like bitchs do. The funny thing about that is I have seen plenty of poor people that are ALOT happier than wealthy people. As far as your conserned..probably shouldnt do anything, not even hang out with her or even act like you want to until she finnally looses him which is what will eventually happen. If hes really violent tell her to have 91...dialed on the phone with her finger on 1 then if anything goes wrong cops are on the phone instantly.