Affery goes to bed. Then she has what she thinks is a dream. (It's not actually a dream, it's really happening.)
She "dreams" that she goes downstairs and sees Flintwinch talking to himself – no, literally, talking to a double of himself. She totally freaks out and becomes sort of catatonic and paralyzed with fear.
The double picks up an iron box and goes out the door.
Flintwinch sees Affery on the stairs and pushes her back to the bedroom silently.
Then he chokes the living daylights out of her, while shaking her awake. He tells her she's been having a nightmare and if she has another one, he's going to give her a big dose of medicine. You know, the beating-the-crap-out-of-you kind of medicine.