I watched a woman spiral out of control like this, right before my very eyes, over the course of about 25 years. I had known her most of my life and she was a VERY close friend of our family. She is about 70 now. I still can't get over the fact that she only had one tooth in her head the last time I saw her.
djayr, I am glad you have gotten away from your A spouse. I am sorry that there was and is nothing you can or could do to help stop the progression of this disease.