I think she was truly sad, maybe even a little upset that the Late, Late show was ending and this would be her last time on it! I don't think she was kidding!
At the very end, she hit the nail on the head. That is why he wanted to quit. it started to fuck him up and he stopped giving a shit about people. No connection. Just 'dead eyes" thinking about "a joke" said before while she is pouring her heart out. I am glad he stepped down. He will be missed, but that is the old Craig I am talking about, not this new one.
She was legitimately disappointed in the card he gave her on her last appearance, and rightfully so. Their relationship during the course of her history on his talk show was such that I'm sure she expected him to write something with far more sentiment than simply "welcome back", which I think is the same thing he wrote to her after just her second visit. He was married and obviously couldn't express anything too sappy, but I expected more from him than just "welcome back". The hand puppet segment had me rolling though....:D
DeeJayRoyalT2 he really are good friends, this year even she was in his show, they do not need to express friendship on a small card when they would see themselves soon after, real friendship is not so, this feeling you expressed naturally, as craig does very well