Escla has a point here. It's different when the victim is isolated or alone. When nobody knows for example or she tries to hide it. in this case it's out in the open. Everyone is watching him, people will support her should she chose to leave.
This is her chance to leave and she really should take it.
You're right about the chance but the question is: how deep is she already in the vicious circle of emotional terror?
I doubt this is the first time he beat her up, so she might already have lost her judgment. From the fact she claimed her injuries weren't caused by him (a quite probably lie), I fear she has. And it's completely not her fault if she has.
Either way, to insinuate she's avoiding rocking the boat for money sounds wrong to me. Besides, she could probably sue a lot more money out of him if she wanted to.