The nurse is caring for a 90-year-old male who has never com…

The nurse is caring for a 90-year-old male who has never completed an advanced directive. The man has a son but has not seen him in several years. A neighbor has assisted him with meals and housecleaning for many years. The neighbor states that the client expressed only wanting to have comfort measures. The estranged son wants his father to be treated aggressively. Which would be the nurse’s initial step?