From The Grey House:
“You came here without telling me. I couldn’t let that go unpunished.” He paused as Joseph took the folder away from Charlie. As the werewolf muttered under his breath, Vincent’s thoughts strayed back to his encounter with Natalia. Vincent could almost feel her warm skin against his and could almost taste her blood on his tongue. The only part of their encounter she complained about was when he drank her blood. His need for her had grown in the past few days. He closed his eyes briefly. He pulled his cell phone out and phoned Justin. He said very little.