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Aiden asks Carrie to move in with him but Carrie isn't sure if she's ready for that step yet. Finding an engagement ring in Aiden's things, then running into Mr. Big doesn't help her decision any. Meanwhile, Miranda tells Steve she's pregnant, Samantha joins the mile-high club, and Charlotte signs up to adopt a baby.
Charlotte: We're not barren, we're reproductively challenged!
(Miranda opens her door to find Steve kneeling on his knee with a ring in his hand)
Miranda: What, are you fucking kidding me?
Steve Brady: Is that your answer?