‘They do not trust her, nor do I’: My elderly parents fear my sister will empty their bank accounts and steal their possessions. What can we do?

I am both the executor of their will and the successor power of attorney if the surviving spouse is deemed incapable. The will distributes assets equally among all three children. My brother is disabled and unable to participate in decision-making, and a special-needs trust is established for him in the will. My father has put in writing to me that he never wants my sister to have access to his accounts, nor make any decisions about either his... + full article