We are going through the same thing, settling MIL estate, DH is exc and he has only 1 sister, never made anything of herself, only came to see her mother when she wanted something, now is pressuring Dh all the time. Not a big estate, but a lot of valuable land. We just want to get all Mil's bills paid and settle with the hospital and do things right and she is worrying us all the time, calling our lawyer, and our bank and just doing things that normal people wouldn't do.
Pam, the more you give some people, the more they want and they never learn.
Sorry you all are going through this, we think it will soon be over and then she can't bother us anymore, once your sister runs through hers, all you can do is say NO!!!