Our Mother (68) has recently stopped taking all her medications, is refusing to see a doctor or do blood work. She is acting mean, aggressive & vulgar to the point we cannot take her grandchildren over to see her. She picks a fight with everyone (even her grandkids). My Dad (her husband) is scared of her, he's afraid she will poison his food. If we do get her to a doctor, I'm certain she won't follow the medication regimen. What can we do?