IMO, too much is made of the whole episode of MMe Adelaide influencing Marie-Antoinette against Mme du Barry. I think it is the kind of thing that happened anytime a foreign princess arrived at a strange court and was still learning the ropes. It was easy for a young girl to be manipulated by the various factions at a court where she was a newcomer, and I am sure it happened to others as well as to M-A. Those events early in her marriage are highlighted only because of the debacles which came later in her life. If the Revolution had not happened, it would have been one more court drama among thousands played out on a daily basis. Some of the things which happened to M-A early on contributed to eroding away at her reputation but others did not. True, Mme Adelaide should have guided her in a more loving fashion, but Mme Adelaide probably thought she was doing right by telling Antoinette not to speak to the putain. If anything the incident emphasizes M-A's virtue in not wanting to tolerate a courtesan in her presence, although this was probably more due to her adolescent prudery and dislike of Du Barry than strong moral fiber, which was still being cultivated.