My husband with dementia and I go to a small restaurant for lunch. Another older couple are frequently there. He is very mean and hateful to her. blaming her for, their "lousy" life, how he has to do everything and that she is worthless. All of this being said so that others can hear. At times a younger women is there and ads to his venom. How should this public abuse be handled? Granted I don't know their whole story, but something is wrong.