Vixen in Velvet by Loretta Chase

From the Diary of Leonie Noirot: The perfect corset should invite its undoing . . .

Lethally charming Simon Blair, Marquess of Lisburne, has reluctantly returned to London for one reason only: a family obligation. Still, he might make time for the seduction of a certain redheaded dressmaker—but Leonie Noirot hasn't time for him. She's obsessed with transforming his cousin, the dowdy Lady Gladys, into a swan.

Leonie's skills can coax curves—and profits—from thin air, but his criminally handsome lordship is too busy trying to seduce her to appreciate her genius. He badly needs to learn a lesson, and the wager she provokes ought to teach him, once and for all.

A great plan, in theory—but Lisburne's become a serious distraction and Leonie's usual logic is in danger of slipping away as easily as a silk chemise. Could the Season's greatest transformation be her own?