When Dan becomes aware Roseanne is faking it and staying in bed, he reverses course and plays the role like she MUST stay in bed and it is his role to supervise her. The end scene shows Dan, aware Roseanne had tried to sneak out, come into the bedroom with a hammer, reminiscent of Kathy Bates ready to hobble James Caan with a sledgehammer in Misery (1990) for doing a similar thing.