Most compassionate people learn this very hard lesson with friends or family…MOST of the time, when you give someone a place to crash, it does not end the way they assure you that it will. I lost a beautiful house letting a violent alcoholic stay with me for TWO WEEKS! It was a difficult, painful experience…but now I am very protective of my living space and energy. There’s lots of good advice in the comments, I hope you get your space back soon. You are a good person for trying, even though she’ll probably villainize you after this is all over.