According to news reports of a couple of years ago she is still bitter about the way she was treated by the press and subsequently many people. She cannot escape being Christine Keeler. She was even sacked from a job as a dinner lady when a newspaper told the school head who she was ~ which I find pretty despicable (Newspaper and School both). As for her knees I would guess they are the same as most 66 year old knees.
Personally I have always felt sorry for her and thought she was a real beauty.