Mom has had late onset Alzheimer’s since 2014. I have POA since 2012. My mother has a house and an aunt and her kids have been living in it. They have been there since my mother needed more care (she is now is with family). My aunt has been helping pay the mortgage, but I just found out my mother refinance her house in 2015 with my aunt as a co-signer and my aunt was added to the title. Now my aunt wants to sell the house. What can I do? My mom is not able to remember this.