Joel. Tate's Crossing, #1

Caitlynne's job was difficult. Doing what she did for the government not only put herself at risk, but any friends or family she had could become a target. When her sister was hurt, she blamed herself even though it had nothing to do with her directly. It didn't matter. It was time for her to quit before someone she cared about ended up dead. Joel Tate had been in the building to meet with Becca Jacobson when she was attacked.
To save her, Joel had to change her into what he was, a wolf. More or less guarding her in the hospital, Joel met her sister, Caitlynne, when she was brought to the hospital to see her sister. As soon as Caitlynne was close enough to him to get her scent, he knew she was his mate. Caitlynne's disappearing act from her job started things rolling. Her boss wasn't taking I quit as an answer. When they tried to kill her by setting her apartment on fire, Joel thought it was time to take the situation into his own hands..