Dealing with emotions

My 87 year old Mother came for a visit this past weekend. She has been supportive of my decision to have weight loss surgery and she stayed with me for the first few weeks after surgery. I had complications and she wanted to be close by (since she lives over an hour away). Anyway, yesterday she started saying things about my sisters being so overweight and how much food they eat. She was being very judgemental. She talked about how she never had a weight problem. I stuck up for my sisters and told her how hard it is to stay in control of portions. It just reminded me of what a disappointment I have been to her all these years. Now she wants to point to me and tell them "see you can do it too" It's not a great compliment when she pits us against each other. I started remembering some of the things I experienced as a child and as an adult with my mother. Yes, she is a great mother and yes she wanted me to be (in her words) slim and trim. But she always cooked fattening foods and always encouraged me to have second helpings or just to "finish off the last bite" This weekend she even brought a homemade pound cake to my house. UGH! It is so frustrating that she just doesn't get it. I know at her age she never will.