The Spy Who Loved Her - Melissa Schroeder

To keep her safe, he will not only have to risk his life, but also his heart.
Lady Anna was once considered the catch of the season. Now, three years after she fell for a man who tried to murder her cousin, she eases her guilt with charity work at an orphanage. Until her mother insists she do her duty.
Attending her cousin's ball is irritating enough. It's her one dance with Daniel, the unscrupulous Earl of Bridgerton, that rubs her nerves raw. And oddly leaves her senses on the edge of arousal.
The ton sees Daniel as a scoundrel. In truth, like centuries of Bridgertons before him, he leads a vast network of spies, protecting England from her worst enemies. His resolve never to marry means the one woman he's always wanted--Lady Anna--is off limits. Especially now that his father's murderer is coming after him as well.
At first, Anna wonders if Daniel was put on this earth just to annoy her. It's only when she finds him injured that his mask begins to fall away--and so do the barriers between them. But their flaring passion puts her right where Daniel didn't want her. Next on a killer's list.
» WARNING: The following book contains: spies, musicales, men who think they know everything, women who know they do not, naughty liaisons, matchmaking mamas, and a seduction that will curl your toes.