I personally wouldn't stay in that kind of relationship. But I have a good job, can take care of myself if I needed to. A lot of these women have low self esteem to begin with and don't have the means to live on their own. As for the documenting thing, I probably wouldn't unless I knew them well. If they confided in me I would definitely encourage them to leave, would possibly offer them a place to stay for a few days until they find the right shelter.