Every Time
One of the funniest things that happens on every season and in every city of the Real Housewives is that one of the ladies will be planning a party. She will invite one or two of the ladies over to discuss who to invite, as if it's ever a question. You are going to invite the people with whom you are contractually obligated to party with - ie - your alleged frienemies who are really your cast members/co-workers. Don't pretend like you don't know who is coming to the party. Most recently I saw this on the Real Housewives of Atlanta with Eva and Kandi. The earliest i remember this is on the first season of NYC when Bethany threw a dinner party at Jill's house and they invited Alex, who was so codependent she asked if Simon could come too.
Speaking of Eva, well-done making a Scarlett Letter reference! As much as the ladies talk about "reading,", I don't think many could actually make a relatively accurate literally analogy.