A 65-year-old patient is admitted to the hospital with advanced renal failure and has previously completed an advance directive indicating they do not wish to receive life-sustaining treatments. The nurse is reviewing this advance directive with the patient's family to ensure everyone understands the patient's wishes. During this discussion, a family member expresses a desire for the patient to receive all possible treatments, regardless of the advance directive.
Considering the legal and ethical implications, what is the most appropriate action for the nurse to take?