And by the way, I hate to admit this in a public forum, and I expect that you'll all act like adults when I tell you this, but when I was married my wife used to beat the shit out of me. And I'm not kidding or making light of spousal abuse, I'm telling y'all to prove a point.
She was about 5'1", and weighed all of maybe 110 pounds. I outweighed her by 50 pounds and all mine was muscle. Still, she beat me silly. I used to sleep in another room and pile up coke cans at the door so that if she got past the lock I'd wake up. I got that scared.
I know you're sitting here going "what a dipshit" or "bullshit" or "how the hell do you let that happen". Well, let me tell you. The first time she did it I was shocked. I almost hauled off and hit back, but I was raised never to hit a woman. So she cried and apologized and we made up and blah, blah, blah, and I thought it was an isolated freak-out incident that would never happen again.
Well, a month later she hit me in the back of the head with a wine bottle. Knocked me out.
I know you're thinking "dumbass, you should have left her immediately," and I would have but you know, at the time you're married and you have a life and you think maybe she just needs Prozac, and maybe she'll get better and all that shit and really your judgment is so fucking clouded you just try to work through it, assuming the person cares about you and that it'll get better. You don't realize that it CAN'T get better. Man I went to work (I was a stockbroker for 8 years) with a scratch on my face that I said was from getting rough with the dog. It was pathetic.
About once a month she just went crazy for no frigging good reason and would take whatever was handy and fuck me up with it, or break something of mine or throw something through the TV or whatever. It was bad.
Finally I told my Dad one day. It was really fucking depressing when he said "Aw bullshit Bob, the girl weighs 100 pounds. There's no way that little girl is getting physical with you, you work out every day." Man that was a low point for me. And I'm a guy who hunts, works out, was a Kenpo guy in high school, played on an adult rugby team. It really has nothing to do with anything other than your immediate circumstance.
Anyway, finally one night when my brother and his wife were in town she went off for no good reason and threw a full glass of wine at my face, and it broke on the side of head. I was never so happy that someone finally got to see it so I could walk away and everyone would know why.
I would never let myself get into a situation like that again but I have sympathy for some poor chick who lives with a guy who makes all the money, who is outsized by a half a hundred pounds, who has nowhere else to go, who gets the shit beaten out of her. You have to see what kind of a hopeless situation she thinks she's in. I was the breadwinner, didn't need her or her money, was ripped and she was tiny, and I STILL let it go on because I was married and didn't want to get divorced and thought that she was a basically good person who just had issues that she needed to work through. In retrospect, that's a problem that can't be fixed and I needed to move on, but when you're wrapped up in a situation and there's nobody there to help, it's hard to extricate yourself.
At THE VERY LEAST, tell her you're there for her and that if she really wants out of a bad situation, you believe in her and you'll help her. That might give her the wherewithal to leave of her own accord without your help. Feeling alone in a fucked up situation like that is bad. Really bad.