On the one hand, Mrs. Jewkes addresses Pamela as if she’s already married to Mr. B. On the other hand, however, Mrs. Jewkes doesn’t treat Pamela with the respect she’d use if Pamela were truly the lady of the house. She is following Mr. B’s orders, and so this shows how Mr. B wants to have it both ways: able to treat Pamela like his wife when he feels like it and able to dismiss her like a servant when he prefers that instead.