>>151143679
She specifically says she'll grant him power but he must complete a task for her, and until then she owns his soul. He obviously hasn't completed it yet, which is why he's still her bitch boy.

Her undisclosed task OBVIOUSLY has something to do with Charlie and her family which is why Rosie wants him at the hotel. And since all the overlords are trying to be top dog, it isn't hard to figure out she's trying to overthrow Lucifer or some shit through Charlie using Alastor.