Overheard in the Wolfe House #157

Peggy: I don't know what's going on with Gus. He has been anxious for several days now. It's the same kind of anxious he had when the batteries went out on the smoke detector. But we fixed it. Last night, he was so anxious, he couldn't sleep. Today, he doesn't even want to come in the house. I don't get it.
Sam: I think the smoke detector in the office is about to go out.
Peggy: Really? How do you know?
Sam: I can hear it clicking softly when I'm in the office. Can't you hear it?
Peggy: No. Only you and Gus can hear it.