My mom has changed and hates my dad. she thinsk he's destroying her life. what can we do. should we pretend that her world is real and side with her? my dad is trying to cope. this is tough.

Melissa,
I know you are in a very difficult situation. My heart goes out to you! Is your Mom on medication? It may be a good idea to get her to the doctor to check her meds and perhaps get some counseling! Is she on an antidepressant? Have you contacted your local alzheimer's association for help?? Please, call them right away!
Good luck and keep in touch!
Lisa