It is a gorgeous spring day in Washington, and I am sitting in a suite at the Hay-Adams Hotel chatting with Roberta McCain while she is having her nails done for Vogue's photo shoot. So far she's been amenable to—and completely delighted with—everything we've suggested: the nails, a change of clothes, a light hair-and-makeup session. "If I leave here and my glass slippers fall off, I won't know what to do," she says, laughing. Next up is a pose in stocking feet on a narrow five-story balcony, which is making everyone but her slightly nervous. "Just call me Barkis," she says, referring to the character in David Copperfield. "I'm willing."

"The Firecracker" has been edited for Style.com; the complete story appears in the August 2008 issue of Vogue.

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