It sounds like you love your mother very much. It also sounds like you felt powerless to help her. My mother recently died of lung cancer from smoking and even when she knew it was killing her she continued to smoke till the end. She told me to quit smoking because she couldn't bare for me to go through the same pain that she was going through. Addiction is hard, I still smoke even after watching my best friend die from it. I have cut down on smoking a lot because I want to stop this cycle. I know how proud my mother would be of me if I stopped.
It also sounds like you are very hurt to have to give the last of your mothers belongings away bit maybe you can look at it as a gift from her to you, you know she wants you well and the silver maybe her way of helping you through this financially.