True, but I also thought they have just played her as if she were decisively younger. There's all that banter in season one about him being old, she's often cast in the caregiver role in relation to him, helping him out with stuff he's a little too old to be on top of himself, that whole thing.
That's funny. The way they talk is very similar to how my 80 plus year old parents talk to each other, and there is a 2 years difference between them.