My father recently passed and my Mother assigned me POA and for Health and Financial. Her health has declined recently and we arranged for her to go to Memory Unit to stay and moved in her items. We found out yesterday that my sister had her sign a new POA giving her control of everything and wants her to live with her. We have tried to contact my sister multiple times but she will not meet with my brother and I to discuss. How can we continue to be POA ? There is a will( yet unsigned ) that named me executor , would this help our case? Where can we reach out for assistance? I just want to make sure my Mother is taking care of.