I assume that you mean that the aunt is the trustee for the trust, not power of attorney. An agent's authority under a power of attorney automatically terminate at death. If she is the trustee, then her duties are governed both by the trust and by the Utah Uniform Trust Code. In some situations, a trustee can be removed for acting against the beneficiaries' interests. A person who cared for the deceased in her last days may be able to make a claim against the trust for compensation.
The answer to the question "what can she do?" depends very much on the facts of the situation. Assuming that your mother's attorney is competent and experienced in trust litigation, she is likely in good hands.
Answered on Feb 25th, 2013 at 12:28 PM