I cannot tell you what she would say, but I can tell you how she would be dressed. It was in the 18th century France that gowns became more elegant and overly ornate. The pannier gown became so huge that it became impossible for two women to walk side-by-side without taking up the entire street. Read on from www.headoverheelshistory.com/1700.html.
Before 1789 french aristocrats were mainly occupied with spending money, making parties, intrigues and such things. After 1789 (the revolution) things changed drastically, and it was wise for aristocrats to keep a low profile, or even better leave the country.