The Courtesan's Secret — Claudia Dain

On the night of her debut two years ago, Lady Louisa Kirkland fell for the devilishly handsome Marquis of Dutton. It's high time, she's decided, that he realized he loves her in return. Also, there is the little matter of Louisa's family pearls, now in his possession. For both problems, Louisa will need help and she knows exactly who to turn to: ex-courtesan Sophia, Lady Dalby.

Sophia agrees to help Louisa get both her pearls and her man, but Sophia knows that Dutton couldn't care less about Louisa while Lord Henry Blakesley couldn't love Louisa more.

When the two men make a bet, the fate of both Louisa and her pearls lies in the balance. But the debutante, the pearls, and the wager are all Sophia needs to hatch the perfect plan.