My half-sister, is almost 50 years old and has been in and out of rehab and jail more times than I can count. There are many, many things that she has done in the past to make my other half-sister and I not trust her, but the rest of the family believes in her and keeps giving her chances to turn her life around.
Three years ago, my grandmother became an invalid and couldn't stay by herself. My parents live next door, but needed help with her. My trouble-maker sister volunteered to move in with her and take care of her even though she wasn't related to her. She lived there rent-free and my mother cooked three meals a day for her, her husband, and Grandma. She did feed Grandma and keep her relatively clean, but had a tendency to disappear for days at a time, leaving Grandma alone until my parents happened to come by to visit and discover that she needed help. Not good at all! After Grandma passed away last year, my parents told her she could continue living in Grandma's house until August when they wanted to clean out the house and sell it- 8 months. She claimed she didn't have the money to move. My parents gave her until October. She still didn't have the money to move. They have given her three more deadlines now and there have been excuses upon excuses. Finally, she agreed to move this past week. My parents were paying for the move and she supposedly had a place lined up to move to. At the last minute, she claimed that the new house has mold and she can't move in. On top of all of this, my sister claims to have cancer, something wrong with her esophogus and something to do with gallstones (even though her gall bladder was removed several years ago). She has no doctor's paperwork to prove it and the stories are all overlapping, so I don't believe a word of it. At this point, if she told me her name, I wouldn't believe it. Meanwhile, my parents are broke and buying groceries on credit cards and going further and further into debt because she won't move out of Grandma's house so that they can sell it. She has said many times that she believes my father should give Grandma's house to her because she took care of her. (My parents took care of her for over 16 years before she moved in, but I guess that doesn't mean anything).
I keep telling my parents that they need to make a firm deadline for her to get out and if she's not out by that date, have everything turned off and change the locks. She has never paid rent and the utilities and cable are still in my parents' name. They are sick, elderly and don't want to fight with her. They think she will leave peacefully, but she's not. It shouldn't take her this long to move a few boxes and get out. While she and her husband are staying there, they have let a bunch of dirty stray cats in the house to use as a giant litter box, ruined Grandma's antique furniture, and broken several things. I guess their plan is to ruin the house so that my parents won't be able to sell it and it will go to her by default.
Does anyone have any advice on what I can do to help my parents through this? How can they get this criminal lying freeloader out of the house?