You tell her that your place is no longer an option, as per your agreement. And she needs to move tomorrow, period. She asked for 2 months and got 3. If she hasn't made use of that time to find long-term accommodation, that's on her. Tell your friend about her reaction, he needs to know who he's dealing with. He agreed to let her stay at his house because you recommended her. This woman seems like the type to cause a lot of problems to people who are trying to help her, so do you really want to end up being blamed for whatever she does at his house?