Erin catches Brynn up on the newest tension between Sai and Jessel. During the group's picture-perfect boat day, Jessel clashes with Erin and Sai while Brynn and Jenna get closer than ever. Back at the villa, Ubah and Erin's pranks on each other result in a shocking shift in their friendship.

On the group's final day in Anguilla, a storm moves in over Erin and Ubah's friendship. The women venture out for a rum tour where Sai revives her bartending career. The ladies limbo with the locals, but Erin leaves early. Jessel's hit list is revealed. At the villa, Erin seeks resolution but is boiled in the hot tub instead.

While in the Hamptons, LuAnn and her children receive a surprise visit from erstwhile housekeeper Rosie. The arrival of Labor Day results in laborious drama when both Ramona and LuAnn throw separate parties, forcing the other wives to choose bashes. Meanwhile, Jason asks Bethenny a crucial question over dinner; and dramas play out between LuAnn and Mario.

LuAnn and Bethenny clash at a Fashion Week show. Later, Kelly, Jill and Ramona gossip about all things Bethenny. As for Bethenny, she hosts a style event, where she and Kelly actually agree on a cease-fire. Meanwhile, Jill's show results in an explosion of drama and one person's stormy exit.

Bethenny and Ramona have a venomous argument while walking across the Brooklyn Bridge. Things don't get any better for Bethenny, who then learns about a family illness. Meanwhile, Kelly snaps photos of random Manhattan denizens for an article; and Alex continues to piece together a fashion-weekend event.

Kelly joins Sonja and LuAnn in the Hamptons for gossipy dishing about romance, marriage and under-the-covers relations. In other diva plot arcs, all the ladies attend Kelly's party, where Bethenny springs breaking news on them and dramas revolve around Jill.

Jill hires new housewife Jennifer Gilbert to plan her holiday bash. Elsewhere, a stunned Bethenny discovers that her pregnancy was leaked on the blogosphere; drama sharpens between Alex and Jill; Sonja visits a nip-tuck doctor and a psychic.

Ramona reveals Sonja's financial secrets. Elsewhere, Kristen visits a new modeling agent; Sonja is stood up by her 23-year-old flame; and the heat is on at a spa when Kristen and Ramona have a dispute.

Tensions arise at breakfast as Luann and Dorinda continue their argument from the night before, as do Carole and Bethenny; the ladies ditch the city for a private island and some fun in the sun, despite the strained relations; and the day ends abruptly with a traumatic boat ride after the ladies are rushed off the island due to high seas.

The women confront Jenna for sneaking out in the middle of the night. Brynn arrives in the Hamptons. At lunch, the women grill Jessel over her incessant complaining and Brynn calls out a double standard. Over sushi, everyone bonds playing a scandalous game of Two Truths and a Lie.

Sai shares her content creation journey, and Jenna cleans out her multiple closets of fashion artifacts. Escalating tension between Erin and Jessel makes for a frosty café confrontation that Brynn and Sai hear about over a game of chess. Jessel hosts a charity event attended by the who's who of the fashion elite, except for Jenna Lyons.

Ubah takes Erin diamond shopping for her 10th anniversary party. Jessel navigates the exclusive New York City pre-school scene. At Erin and Abe's anniversary party, a bored Brynn stirs the pot and Sai gets upset about the lack of food.

Sai helps Jenna cast models for her false eyelash line. Brynn helps her ex-fiancé shop for luxury classic cars. After keeping her IVF journey a secret, Jessel finally reveals her infertility struggles to her mother. Brynn invites the women to holiday wreath making, where Erin confronts her about her antics.

Over the holidays, Jenna's brother visits New York and Brynn connects with her brother in Los Angeles. Sai and Ubah shop for the group's warm-weather getaway to Anguilla, but Jenna's choice to fly separate from the rest of the ladies results in an icy greeting on an island paradise.

Back in New York, Sai and Erin share a spicy double date with their husbands and Brynn plays wing woman to Jenna. Ubah hosts a post-Anguilla healing session for the group. Jessel finally has a staycation with her husband, but at lunch with Sai, she tests their friendship.

Couples' night, hosted by Erin and her husband, puts Jessel and her husband in the hot seat. Ubah shares a secret with Sai. Jenna takes her son shopping. Sai shares a heartwarming moment with her aunt.

Tinsley shares a recent picture of Ramona locking lips with Harry Dubin; Sonja loses it after leaving an AA meeting, but Luann doesn't let that rain on her cabaret parade; the women confront Luann over her selfish ways; Bethenny has a panic attack.

Bethenny plans to make lunch for the women, but Ramona stirs up tension when she wants everyone to go out to eat instead. Later, Ramona's antics interrupt the ladies' night of dancing, and Sonja plans a fun day at a hotel.

An old-school skirmish erupts between Dorinda and Sonja during a lunch in the Bronx. Tinsley breaks down during therapy. The ladies head to Vermont for a snowy weekend, despite tension between Ramona and Bethenny. Tinsley's life decisions are discussed.

A profanity-laced dinner continues, with Dorinda storming off and Heather dashing after her. Later, Heather tries to confront LuAnn and Ramona for their late-night antics. Also: Grievances air and tensions rise at Kristen's decorating dinner.

Ramona’s Hampton’s dinner party continues and barely into the salad, Dorinda takes the conversation to a new level when she confronts Sonja about her incessant trash talking. Carole disinvites Ramona from her Election Night party because she doesn’t believe Ramona is taking the presidential election seriously enough. Tinsley gets drinks with Luann and Dorinda, but leaves out her roommate Sonja.

The ladies arrive in Mexico, with Ramona and Sonja scrambling for the best villa room and swiftly alienating themselves. Tinsley addresses a damaging article about her. Luann takes a boozy tumble. Bethenny reprimands Sonja for her bad behavior.

Fresh off of their day trip to Tequila, the ladies drink up and strip down back at the villa. Sonja spreads the love to all the ladies while Bethenny and Ramona have a nude detente in the pool. Dorinda and Bethenny get into a fight that leads to knives flying. Some of the ladies split off for a day of fishing and whale watching. At their final dinner Luann flubs the rules of a game.

The ladies take a limo ride to Atlantic City to celebrate Ramona's birthday, her first without Mario. A lavish dinner, raucous gambling, dirty dancing and dramas surrounding Sonja are in the cards.

Ramona and Bethenny have a tear-filled heart to heart after the other ladies go to bed. In the morning, Dorinda has a serious talk with Sonja, reminding her to stand up for herself and not allow the other women to walk all over her. Sonja decides to skip the yacht outing where the other women have luxurious day connecting with each other.