Sorry just got back on and caught this thread. Agree with the others , horrible that she is taking advantage of your kindness. Sending lots of hugs for you to get through the remaining days with.
I have friends staying next week and I'm a bit worried about it. She will be fine but I've never met her hubby. I've heard he's a bit strange. Our house is small so it will be a struggle to keep out of each others way.