In the first series, Ramona and LuAnn get ready to visit the Hamptons for the summer with their families, Jill takes her daughter shopping, Romana's daughter goes to an elite modelling agency, LuAnn visits the Statue of Liberty and Jill throws a party for all the housewives.
All of the original housewives return for a second series and they are joined by former model Kelly Killoren Bensimon. Bethenny and Jill spend time together in the Hamptons. LuAnn begins works on an etiquette book, Jill redecorates her apartment, Kelly and Bethenny come to blows at a local bar, Jill makes a fool of herself when she discusses the struggling economy on a radio show and later hosts a charity event.
All of the housewives from series two return for the third series and they are joined by another new cast member - socialite Sonja Morgan. During the series, Bethenny poses nude in a photo shoot for animal rights organisation PETA, Ramona takes her daughter to a fashion show, Kelly photographs random people on the streets of New York City for an article she's writing, and Sonja helps LuAnn throw a charity party.
The women take part in a protest march and bring some drama of their own, LuAnn's boyfriend organises a speed-dating party, and Sonja arranges a meeting between Ramona and Kelly.
Sonja hosts a party but things take a turn for the worse, LuAnn and Ramona clash while trying to make amends and Heather tries to persuade the girls to accompany her on a trip to London.