My grandpa just passed before Christmas since then my grandma has been acting like a child. She has been to the hospital 3times because of her blood sugar being more than 500 she refuses to follow her diet she has been staying with her sister and has been throwing things and screaming at them for no reason. She is mentally incompetent but refuses any test to prove it. She is I believe brain washed by my "junky" of an uncle who I believe is after all the money she is to get from my grandpa's passing. She wears a diaper but rarely changes it until it leaks. In my eyes she is defiantly a harm to herself and childishness is causing harm to others. How can I go about helping her?