Gail and her husband, Dr. Stephen T. Greenberg, host a Plastic Surgery Fashion Show; Amy's volatile relationship with her fiancé blows up in public; Liza confronts the biggest change in her life since her scandalous divorce.

While the friends head to the Hamptons to beat the heat, Amy stays behind to fix her broken relationship with her fiancé, Arthur; the pressure of running her health and wellness spa takes its toll on Cori's marriage.

The women bid farewell to Gurney's Montauk Resort, but not before Susan and Liza settle a score in the sand; Cori's spa teeters on the brink of disaster; Liza confronts her fears as her old life is ripped away.

Liza is on the hunt for a man while Amy struggles to fix the one she's got; when Cori and her husband host a dinner party, Susan's ex-con husband brings a major revelation to the table.

Emotions run high on Fire Island, N.Y.; Susan's husband brings Cori to tears; the group tackles Amy's love life during an intervention; the women take part in a "walk off" at a drag show; Susan makes excuses for her husband's bad behavior.

Issues center on Amy and her son. Elsewhere, Cori reaches out to Gail for advice about a potential cheating drama; Liza calls out her ex-fiancé for re-gifting an engagement ring; and Susan tries to make amends by inviting her friends to a birthday party.

Susan's husband, Jonathan, is out of control, and the others are fed up; Amy turns the tables on Andi; Gail worries her husband is backsliding; on the eve of their 20th anniversary, Cori forces Sandy to come clean about his dirty text message.

Cori confronts Sandy about letting her down at their anniversary party; Amy's son gets fired; Dr. Greenberg pulls the wool over Gail's eyes; Susan sees a new side of Jonathan; Liza plans a moving-out party.