The Mistress Trilogy, book 2: The Accidental Mistress
Tracy Ann Warren2007

To escape an arranged marriage, spirited Lily Bainbridge has staged her own death and, disguised as a boy, fled to London and a life of freedom.

Yet her plans to masquerade as an independent widow are thwarted by an encounter with Ethan Andarton, a powerful and dangerously attractive marquis who wants to make her his mistress. But Lily is afraid that if she gives the Marquis of Vessey her innocence, he'll steal her heart.

Titre original : The Mistress Trilogy, book 2: The Accidental Mistress (2007)