I only noticed a few times when she brought up age, and all of them were natural and appropriate in the context. Eg she was asked how old she was when she opened the dry-cleaning business.

Also, there’s this weird thing in culture (is it US only?) that whenever an interviewer brings up (even implicitly) the guest’s age, the guest has to make some quip about it as if they’re offended or sensitive to it. So I wouldn’t interpret even a slightly defensive comment about age as an “obsession.”