Three's a Crowd (S01E08)

Charlotte is in a relationship with Jack, who suggests adding a third person to the mix, leaving her conflicted. Meanwhile, Carrie learns about Mr. Big's former wife, sparking feelings of insecurity. Samantha is involved with a married man, and when his wife catches on, she suggests a threesome as a way to save their marriage. Meanwhile, Miranda grapples with her self-image and seeks reassurance that she is still desirable.