Other mother - villain

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The other mother is the villain because she tried to kidnap coralines parents and she took the three kids souls away. On page 93 she promised not to cheat and be fair, and then on page 111 she tried to trap coraline in a cellar by threatening the other father and making him trap coraline in the cellar. She did not keep her promise.
“A deal” - other mother “how do I know you will keep your word” - Coraline.
“I swear it on my own right hand” - other mother.