Mind of Danger by Sidney Bristol

Marjorie is in over her head in a big way. All she wants for Christmas is a safe way out of her undercover gig for the FBI, but with no back-up and no hope for extraction, she’s set to get nothing but a bullet this holiday. Unless she calls him. The one-man she’s always wanted by her side and in her bed.
Elias has come to terms with his life. He isn’t where he expected himself to be, but working with Aegis Group still allows him be a behind-the-scenes hero. Too bad Christmas is full of nothing but ghosts from his past…until he gets her call. Marjorie was always forbidden fruit and now she’s calling him for help.
Two friends reunite under the guise of a simple holiday favor, but things quickly take a dangerous turn as Marjorie’s target aims his sights on her. And the only thing standing in their way is Elias. This Christmas, passion will ignite a new fire as the enemies close in.