The reading in Language of Letting Go today was about "hooks" and sadly they play the "hungry kids" hook a little too often, many times right after they blew their money on drugs, where was the concern about the hungry kids then?
Like Moose, I would take a few groceries over if I thought there might be any truth in it but cash wouldn't be a part of it.
Good for you, you didn't get hooked. She didn't clean to repay you last time, it's not likely she would this time either. Responsibility is hers to follow through and do what she says she will do.
Hugs