She was diagnosed with a syndrome in which improvement is possible and that she has. My sister is not allowing my mom to make the decision to go home or even visit her own house. I don’t see how this is legal? My mom's name is on the deed.... why can’t she go there? And does my sister have this right?
If mom is incapacitated in any way, the POA cannot be changed.
Although most people who are moved to care facilities “want(s) out”, IF your mother can make a case for potential for improvement to her condition, she MAY be able to revoke her designation of your sister as POA. Returning to her house MAY be based on your mother’s present cognitive status, and not on whether or not her name is on the deed to the house
She will need a lawyer to represent her own interests, and help both you and your sister get a clearer picture of her (MOM’s) rights.