I agree and I think it is because of a number of reasons...She has been with Fred for over 10 years, married for 7 years, had 4 kids and is about to turn 40...I think in the beginning, even at informal events like the horse show, she felt she had to be on show too...But now she seems more relaxed, comfortable, doesn't need to impress anyone if she doesn't want to...And I think the lines have been firmly drawn between daytime official and daytime personal/private, which this horse show was, just a day out with the family catching up with a friend...no need to be so stiff and uptight in clothes that are too dressy...This was just pure and simply, Mary being a mother and wife and friend, the real Mary...not Crown Princess Mary! Just for few hours at least