Is an attorney required to provide any information to family when they don't have the POA?

My husband's 97 year old Aunt gave financial POA to an attorney - medical POA to my husband. A health crisis 3 years ago caused these to become active. My husband has managed her care through a couple of hospital stays, eventually moving her to a Board & Care home from a SNF, mostly for better car but also to conserve funds. My husband and his brother are concerned about how the attorney is managing his Aunt's assets. All she will say is that his aunt will not outlive her assets and offers no accounting. How do we know that she is handling things properly??