Unoriginal Sin

Samantha announces that she's back with Richard, who buys her an outrageously big diamond ring as a proof of his sorrow and commitment. Still, Samantha has doubts about his regeneration and can't seem to get over the image of him being intimate with another woman. Meanwhile, Carrie avoids her editor by all means thinking she's going to get fired, but turns out he just wanted to tell her she's been offered a book deal. Hesitant, Carrie is asked to write an introduction and answer the question: "is there hope for single women?". To help her figure out the answer, Charlotte takes her to a positivism course, where she learns that although seemingly a positivist, Charlotte is a big negativist. More than that, she's got a broken heart. And Miranda has to handle a request she can't deny: Steve asks Brady to be baptized. He even brings in his mother for the ceremony, and Miranda asks Carrie to be the baby's godmother.