I tried to respond here last night, but the board kept timing out. I'm not sure what was up with that.
FP, please vent away, I don't mind at all. I've heard comments just like the ones your mother said, and I know all about doing damage control after a visit. Some of my favorites:
"Grandma just misses you so much, she doesn't know what to do without you."
"Grandma just feels sick when you aren't here."
"Grandma's just so lonely without you." This one had my son trying to think of ways to keep her from being lonely. He was going to invent a robot so she wouldn't be lonely.
I'm doing better now, after the shock of this incident last week and talking to my father. I won't say that I feel great, but I feel better than I did on Friday, where I really wanted to cry. Today, I just have a sort of blah feeling. My brother and I talked last night. We agreed that he wasn't going to pass along anymore information to my parents, and I said I wasn't going to call. His exact words were, "I guess they can sit out there all alone. That must be what they want because they've alienated everyone else.