A year ago my mom gifted her house to her my sister. Within a year they made it hard for my mom to live in the house and gave her three days to leave. She is now in independent living. The house was up for sale and my sister badgered her to give her the house. Can in the future I get the house back if I can show it was a planned thing and my mom was treated poorly. My mom still talks to her because she says it is her daughter and she gave birth to her. She tells me that she doesn't want the house back because my sister has health problems and cries. My mom is 91. What can I do?