C.Ann:
I know how heartbreaking it is

*hugs* My mother hasn't known who any of are for a few years now.
It all started about 6 years ago, she had a stroke but then seemed to be making really good progress in her recovery. But then we all had to realize that she had Alzheimer's, as well. I moved to MA about 5.5 years ago and one day I got a call from my sister, letting me know that my dad was upset with me because I hadn't called my mom in a long time. I was shocked! I ALWAYS called my mother at least every other day!!! When I lived in NJ, I spent several days a week with my mother. That's when we realized that my father would ask her "Have you heard from Terry lately?" and my mother would answer "no", all because she simply didn't remember that we had spoken that day
One night my father heard noise down in the kitchen, he walked into the kitchen to find my mother eaten frozen pizza, right from the freezer
For the last 2 years my mother has been totally bedridden, hasn't spoken a word in over a year, and has to be hand-fed.
All of us kids are extremely grateful that my father, who is almost 80 (my mother will be 84 next month), is caring for her 24/7 at home. My sister who lives 1/2 hour away goes to their house a couple of times a week so my father can get out of the house or just go take a shower or whatever he wants to do. As for right now, we're just glad that she is able to chew and swallow her own food. I don't think it'll be easy once she loses that reflex
Anyway, I didn't mean to post so much about my own mother... but I do understand how you feel. Sometimes I have very vivid dreams that my mother is fine again, and talking and everything... then I wake up and feel sad realizing the way things really are.
*HUGS* C.Ann... if you ever want to talk, please feel free to email or PM me!