craigb
You need to do some investigative work. Sounds like she's heard you have assets she missed... 
Sounds like she took too many vacations and now needs money. I don't know now but I will soon enough. I hope I can find a house in time. She'll be working all day so I'll have time to actually look for a house myself. Maybe she is doing it cuz she's had a change of heart and wants another go.

My sister says enjoy the stay while I can because
" She bought that house with YOUR money!".