The Courtesan's Courtship — Gail Ranstrom

When Dianthe Lovejoy is accused of murdering a courtesan who bears an uncanny resemblance to her, she must go into hiding. And the only man who can protect her is her enemy -- notorious rake and gambler Lord Geoffrey Morgan.

Owing a debt of honor to her relative, Lord Geoffrey reluctantly takes in the meddlesome miss. But when he learns of her plan to masquerade as a courtesan to unmask the villain, he vows to put a stop to the ridiculous scheme. Thinking that training Dianthe in the courtesan arts will scare her off, Geoffrey discovers that he's met his match. Especially when Dianthe practices her newly acquired wiles on him....