Showing Midnight Games by Elle Kennedy

She wears a thousand deadly identities. He sees through them all.
 
A master of disguise, Isabel Roma spends her life pretending to be other women.  Normally, her emotions are reined in tight—but sexy mercenary Trevor Callaghan has a knack for getting under her skin. The elite operative’s quiet strength and raw magnetism affect her in ways she’s never felt before, a distraction that can quickly turn deadly in their dangerous line of work.
 
After putting his tragic past behind him, Trevor is ready to focus on his future—and he damn well intends for Isabel to be in it. When their entire operation is thrown into chaos, Trevor enlists Isabel’s talent for deception. And as they attempt to save their team in a world where the stakes are high and the danger is grave, Trevor must convince Isabel that the woman beneath all the disguises is the one worth having....