How do I know you'll keep your word?" asked Coraline. "I swear it," said the other mother. "I swear it on my own mother's grave. " "Does she have a grave?" asked Coraline. "Oh yes," said the other mother. "I put her in there myself. And when I found her trying to crawl out, I put her back.
To do just the opposite is also a form of imitation.