When she discovers that Big is dating other women, Carrie realizes that she desires a monogamous relationship with him. In the meantime, Samantha is having trouble being monogamous with her realtors. Charlotte dislikes the sexual desires of her new boyfriend, and Miranda confronts jealousy when she runs into Skipper with his new girlfriend from Vogue.

Miranda considered Sunday a nightmare because children swarm everywhere, there is even a family hour at her gym, but it did allow her to meet hunky Simon Cobb, indulgent divorced father of rascal Simon, who loves to push the elevator's buttons, and his; when Simon surprises her naked in the lo after a hot night, that signs her marching-orders. Carrie met fiction writer Vaughn Wysel at a lunch; he presents her to mother Wallis, her partner Duncan, a teacher, and sisters Franny and Zoe, who all insist she stays for a seafood feast; six hours later he can finally jump her bones, yet his sperm beats him to the post. She keeps dating and doing him for his whole family, mainly the fascinating mother, an Oscar-nominated documentary maker, despite his recurring precipitous wetness, but precisely her liberating education without sexual taboos proves unsurmountable. Charlotte receives her studly brother Wesley, about to be divorced from Lesley; he tickles Samantha's fancy at first sight. Charlotte explodes finding Sam in her guest-room wearing only his T-shirt, but when Wesley explains he needed the sex after two sexually frustrated years with his frigid wife, Charlotte goes make up.