I'm getting ready to visit my father and step-mom in Arizona. She has Alzheimer's and they live independently in their own home. I have not seen them since Labor Day and have asked my step-brother for an update on how they're doing as he spent Christmas with them. His formerly, very pleasant mother has become rather nasty and is taking it out on everyone. Especially my father. How should I handle her behavior? I can deal with her lashing out at me as I truly understand this is the disease but I'm afraid I'm going to "lose it" when she turns on my father who has been wonderful in taking care of her. I want this visit to be as pleasant for my dad and intend to relieve him of most of his responsibilities while I'm there. I hate to admit that I'm dreading this trip.