From Inside The Grey House:
Natalia gave Charlie a pitiful look. He came back from Montana about a month ago. Rebecca was still taking care of the twins on Vincent’s ranch. As her husband seemed to grate on her every nerve, making it hard for her to watch the newborns, she sent Charlie back here. Without Rebecca, Charlie seemed a little harder to control. Vincent didn’t seem to appreciate having the werewolf without the Alpha, but understood Rebecca’s need for space. Charlie’s frustrations seemed to be transferring to Orlando and Doug, who were generally more controllable. If Charlie felt like he needed to get out, maybe it was best to get him out.
She sighed. “Maybe I can use you, but Charlie, you’re going to have to travel in wolf form and hide in my backseat.”