Two of my uncles and my aunt have treating my mom, (who has POA) like absolute trash. They are always accusing her of wasting my Grandma's money, of not telling them things about her care, and not involving them in decisions, etc. I think she should flex that POA and refuse them access to my Grandma completely until they can apologize or she passes on. Whichever comes first. Can she legally do that? None of them are in a place to start or finance a legal battle.