"I have a plan," Mr. Willoughby said, putting his paper down. He stroked one eyebrow in a satisfied way. "It’s thoroughly despicable."
"Lovely," said his wife. "A plan for what?"
"To rid us of the children."
Little do Mr. And Mrs. Willoughby know that while they are trying to rid themselves of their children, the children—four of them—are trying to rid themselves of their terrible parents.
This is a humorous book, of course, and no one is recommending that real children do away with their parents. (Unless, of course—heh heh—their parents are as outrageously awful as Mr. And Mrs. Willoughby!)