Dirty Little Secrets (Harlequin Intrigue\The Delancey Dynasty)

DECEPTION TURNS DEADLY IN MALLORY KANE'S DIRTY LITTLE SECRETS 

New Orleans detective Ethan Delancey has a mission to solve a senator's murder. Putting Laney Montgomery—the sole witness, who now has a cold-blooded killer on her heels—under his protection? Pure instinct. Every hour pushes her deeper into danger. The only way to ensure her safety—and capture a criminal—is to keep her close. 

Neither expects the flare of desire that pushes them over the line between professional and personal. Even as Laney's secrets start to unravel, Ethan is driven to watch over her despite the rules of his job and the threat against them. Together, they're on the verge of discovering every dirty detail of the truth…unless an unknown murderer finds them first.