She is 50. We live in a world in which we believe a woman at 50 looks like the twin of her 25 yo daughter. Some woman do, great, wonderful, either with great care or great genes. Some just don't.
I think Mary looks exactly like about 95% of the wealthy, well-kept women who lunches. She is thin, which is rule number one (but doesn't help with keeping enough collagen) her hair is carefully coiffed in what she considers her signature look, her fashion is expensive and elegant, her make-up professional and yes a tad too much.
I see Mary's at absolutely every EVERY higher social functioning...
Mary is very, very plain and ordinary compared to most wealthy women who are just the wives though. There are wealthy couples who met pre-wealth where the woman is as homely as Mary, but name me a wealthy man who chose a plain woman AFTER he developed his wealth! Fred is unique!