I agreed to be executor of mom's will. She contacted the lawyer and had a power of attorney issued naming myself and my brother as power of attorney. I live 2000 miles away and do not believe I can assist her with her finances. I don't trust my brother. My concern is being responsible legally for her expenditures that may not be in her best interest. I told her not to put me on as power of attorney. How can I opt out of this responsibility?