I am so sorry you have to deal with this. I am going through this with my mother as we speak. She is late stage 6 early 7. The most important thing I have learned so far is to always have patience. Her mood and behavior have changed drastically, but I realize it is not her fault. I answer questions and fulfill requests as if it were the 1st time and not the 10th time today. She has slowly forgotten so many loved ones, even me at times. I remind myself daily that although she will eventually forget who I am, I will never forget who she is.