Oh, hon. My grandma was like that, too. It's so hard, especially if you get mixed messages. Mind you, I take after my grandmother 100% physically. She was a bigger woman from her tee years at least, and on a diet of some kind her entire life (died at 92, though, so despite the obesity, she had a good run). But my God, she would be one minute talking about my weight and the next breath offering me food. Her idea of a portion size was a full 1lb link of Polish sausage. She would put out enough food for snacks to feed a small army. But then, "Oh, you have to watch it or you'll get fat." I swear there needs to be a patron saint for people trying to be polite to their family members under trying circumstances.