Now that Miranda and Steve have fallen out of love over parenthood, they painstakingly live apart in the same flat... At Aidan Shaws's design fair, Carrie bumps into Mr. and Mrs. Big. Later, a drunken Big blurts out to Carrie that he not only wants a divorce but also wants her back. Then, when Aidan generously starts improving her apartment, the noise drives her to a hotel... Charlotte is convinced Trey is ready to propose and is presented to his mother Bunny MacDougal. She seems to control him masterfully. Later, Charlotte uses Bunny's sleeve rubbing trick and makes him thoughtlessly accept a wedding proposal by her. She instantly regrets it because it lacks the romance she desires... Sam likes giving blow-jobs, but her present lover, Adam Ball's sperm tastes really bad.

Carrie feels guilty as hell about sleeping with Big behind Aidan's back, but re-offends when he's out of state; while Big announces he wants to leave his wife for her, she loses Aidan's dog, Pete. Charlotte's engagement-bliss withers when Trey's family's 'standard' prenuptial appears. Just after boasting how much better life is without a steady man, Sam experiences it's no fun being single with the flu. Miranda is very happy with a young new colleague, having a one nightstand followed by long-term phone-love as he returns to Chicago- till she finds out...

When Miranda tries multi-dating, she quickly finds nobody wants a lawyer, while her same physique appeals as a "stewardess". Things get interesting for her when she decides to date a doctor - At Charlotte's rehearsal dinner, Samantha hooks up with Trey's cousin Caleb, even if she can't understand his Edinburgh accent. Carrie is touched that Aidan created a love-seat as a wedding gift for her friend Charlotte; finally she gathers the courage to confess her infidelity with adulterer Big - Charlotte has a sleepless night before her wedding after sleeping with Trey for the first time.

Upset by a hateful glance from Natasha who saw the quartet in a restaurant, Carrie loses her way and gets robbed of not just valuables but, far worse, her favorite designer sandals. When she files a report, the NYPD detective and Miranda immediately fall for each other. Now that Charlotte has lost all hope in Trey's potency, her lust wanders off to the McDougal's hunky bare-chested gardener; when her lips follow, the family accepts it, even Trey, but she can't handle this emotional neglect. When Samantha gets calls for another Sam Jones who gives a mega-party, she takes Carrie there to finds it's a virgin boy who lusts for her at first sight.

While Miranda has the feeling there is a ghost in her apartment, Carrie feels haunted when she gets an invitation for the new bar opened by Steve Brady and her own ex Aiden Shaw, but considers he must go as a step to becoming friends again. Samantha gets fed up with Maria's raving about relationships and just misses mens dicks. Charlotte feels it was bad enough Bunny dominated the interior-decoration of their apartment, but then she dictates what type of bed they should get and when he catches a cold even moves in to nurse her 'little boy' exactly as she always did.

When Miranda learns Steve has testicular cancer, she gives him a 'kick in the balls' about taking it serious and then feels guilty, but he ends up thanking her for making him get the best possible care. Samantha can have orgasms again but freaks out every time a date asks about her plans for the weekend, so she accepts when Carrie begs her to come to Aidan's wood cabin up state where city girls feel stranded; Sam quickly focuses on hunky farmer Luke, Carrie crashes in front of Aidan. Charlotte is in the McDougals posh Connecticut country house where mother in law Bunny nurses orchids and sits at Trey's bath planning her still hypothetical grandchild's future, just when Charlotte's meticulous fertility planning dictates using Trey's saved up seed...

When Carrie's apartment is going co-op, Aidan proposes they buy it together. She finds a ring in his things, and accidentally insults Miranda who helped pick it out. Trey's MD tries to control Charlotte's reproductive zeal in light of the tough statistics of in vitro fertilization, and Charlotte looks into adopting a girl from China. At the annual Highland Fling, Bunny's objection to a 'Mandarin granddaughter' causes a marital row. Samantha finds out Richard Wright is a tough boss but into quick sexy without commitment, such as on a flight to Rio. Miranda tells Steve he's becoming a father but that she doesn't expect his help.

Big tells Carrie he's moving to Napa Valley, but their last night together is interrupted when Miranda goes into labor; Samantha suspects Richard of cheating.

Samantha supervises Anthony at the preparations for Carrie's book presentation party. At her publishers, she meets another author, Jack Berger; they hit it off and have a lovely day. However, only when she invites him to the book party does he decline because he reveals that his girlfriend's family is visiting then. Miranda tells her hot lover Walker Lewis about her baby at the party, then they have sex, but Bradys crying sets him running. Charlotte is finally ready for a real relationship again, and has another perfect suitor: Justin Anderson III. However, when they wake up in bed, Bunny enters the room pointing out that the apartment is hers, and Justin runs when he learns she's separated. Samantha insists Carrie has the same treatments as her; a manicure, pedicure and botox. But Sam takes chemical peeling first - which practically burns off her skin, utterly unsightly. At a restaurant Carrie can't get out of allowing her former Vogue-publisher Enid Mead to share her table. Samantha turns up as Carrie insisted, but refuses to put her hat and veil on again, so she literally scares off Harold Keenan, The New Yorkers critic. Stanford is proud to present his stunningly gorgeous boyfriend Marcus, date-less Anthony is green with envy.

Miranda feels a double failure as neither motherhood nor professional life can get her full attention, and her neighbors give her dirty looks about her screaming baby. Samantha feels her own problems, such as a broken vibrator, are no less important, and demonstrates her expertise on the subject in the shop. Carrie encourages Samantha to acknowledge that Miranda is now a mother, and Samantha eventually offers to babysit Brady while Miranda goes to her hairdresser. When Charlotte feels uncomfortable talking tough with her attractive lawyer about Bunny's divorce terms for Trey, so she switches to his bald partner Harry Goldenblatt.