Sex, Lies and Midnight (Harlequin Blaze Series #660)

Born into a con artist family, Maya Nicholas abandoned the grifting life to live on the straight and narrow (and somewhat dull) years ago. But when her family is threatened—and the swindlers are on the verge of becoming the swindled— Maya swings into action. All she needs is a stand-in boyfriend, and the charming, tasty-as-sin Simon Barton will do quite nicely, thanks.

But Simon has a little lie of his own. He's FBI, and Maya is his inside track to her less-savory relations. It's a mutual using, which quickly turns into a scorching mutual attraction.

In fact, their naughty little sexcapades are the only things they aren't faking!