Is she trying to act like your mother? I had a therapist who said she was "reparenting me".....

I agree that you should talk to her about it, telling her you're uncomfortable with what you perceive is too much "intimacy"---you don't like being called "hun" and so on. But remember that she's 73 and I doubt there's anything sexual about it all, that she's probably trying to be caring and supportive--and was proud of her new choppers!