I wonder if she is trying to help alleviate her unhappiness with her boy friend. I cannot see what she can see in the slug either, but some women strangely enough cannot see when they are being abused. I think that by stocking the shelves and refrigerator with food you can help her out a lot, since she will not take payment for rent etc. Just paying bills like utilities etc too might work. It will give her less to throw in your face when she is upset