Season 4 begins with Ramona hosting a rooftop cocktail party. Elsewhere, tension continues to brew between Jill and Alex; and the ladies gear up to participate in a gay-equality march. Single mother and spa entrepreneur Cindy Barshop joins the cast.

The ladies participate in a marriage-equality march over the Brooklyn Bridge, yet there's drama with these mamas when tension heats up between Sonja and Alex. Elsewhere, an offensive remark delivered by Ramona spreads back to Cindy.

Alex attempts to mend her relationship with Sonja by having lunch with her. Meanwhile, Ramona, who gained infamy for her wild-eyed runway walk the year before, is asked to appear on the catwalk again. This time, she enlists Sonja for some modeling tips. Also: Alex basks in her new career as a model; LuAnn's boyfriend throws a get-together featuring wine and speed dating; dramas intensify between Kelly and Ramona.

Ramona gripes when a certain wine isn't made available at Cindy's birthday party. Meanwhile, a betrayal results when Sonja confides in Cindy that she plans to negotiate a meeting between Ramona and Kelly; LuAnn throws a cocktail party for the wives in the Hamptons.

Jill returns from Australia a new woman---or so she says. Her newfound sense of purpose to avoid gossip quickly ends when she dishes about Ramona during lunch with Kelly, LuAnn and Sonja. In addition, Sonja details the group's "pecking order" dynamic; Cindy and Ramona meet for drinks, but tension spills over.

The ladies bask at a mask bash when Sonja hosts a masquerade ball. In addition, Cindy goes to the dentist with Jill in tow, but Jill adds some bite by offering way too much input. And Ramona throws a wine party, but gossip spills over.

LuAnn plans a big exotic trip for the ladies, hoping the getaway will help quell all the petty clashing. Some of the ladies prepare for the vacation by checking in at a spa, while others save face by visiting a plastic surgeon. Elsewhere, Jill hosts an anti-bullying event---even inviting Ramona to the affair.

LuAnn hosts the ladies in Morocco, where she nabs Sonja and Ramona trying to secretly leave the property shortly after they arrive. Later, Jill runs into an old friend while shopping, and he invites the women to his birthday party, which features a fortune teller and a snake charmer.

The ladies' exotic Moroccan getaway continues, as does their reading with a fortune teller. Later, the wives visit a market and take a camel ride in the desert, yet uneasy rider LuAnn takes her hump lumps when her camel tries to buck her off. Meanwhile, Jill and Ramona finally decide to have their all-important talk.

The wives' Moroccan adventure continues, but there's a bump in the riad. The aftermath of a blowout between Jill and Ramona leaves Ramona still shaken, prompting yet another confrontation. Minus Ramona, the ladies also tour lavish palaces.

The ladies wake to their final hours in Morocco. Packing is the order of the day, but Jill and Ramona find time to try to patch up their hot mess of a relationship. Before long, however, anger toward Ramona comes from someone else. Calmer heads prevail, and the ladies reminisce about their exotic getaway while anticipating a return home.

Sonja enlists the help of a feng shui expert to bring more positive energy into her life. Meanwhile, Ramona plans a surprise party for Sonja; Simon confronts Jill at Cindy's product-launch soiree; and Kelly reaches out to Alex about Simon's odd behavior.

Sonja hosts a burlesque-themed party and puts on a show for her guests. Elsewhere, Jill visits her daughter at college; LuAnn and Jill hear LuAnn's new single at the recording studio; and Simon confronts Jill about her cyber-bullying accusations.

LuAnn hosts an anniversary party celebrating her one year of dating Jacques. Among those invited: all the Big Apple ladies and songstress Natalie Cole, who offers to sing a tune—with LuAnn. Meanwhile, Ramona throws a dinner party and discloses that she wants another baby.

Hosted by Bravo's Andy Cohen, part one brings together Kelly Bensimon, Jill Zarin, LuAnn de Lesseps, Alex McCord, Ramona Singer, Sonja Morgan and Cindy Barshop to discuss some of the most talked about antics of the season.

Conclusion. Andy Cohen hosts a reunion installment featuring the upper-crust Big Apple ladies, who recall Season 4 dramas and field viewer questions.

It's a birthday blitz when Ramona plans a sweet-16 party for Avery, LuAnn meets with a party planner for her own daughter's 16th birthday, and LuAnn throws a surprise birthday bash for Jill.

LuAnn tries to hit a high note. She plans production on her music video and invites her fellow Big Apple wives to participate. Meanwhile, Sonja's attempt to form a friendship with Cindy results in catty drama; and Alex throws an art party.