Sentence:  Not bothering to turn around and not missing a mouthful, Myrtle comforted her with threats of "I'll <WSD>warm</WSD> your bottom"; "I'll turn you over to your dad"; "I'll lock you in the truck"; "I'll send for the bogey man" — all of which Darleen ignored ... 
Meaning of the word marked with <WSD> tags:  To beat or spank.