Sentence:  "But thank God," she muttered in a lower tone, "that Shirley is not old enough to go." / "Isn't that the same thing as thanking Him that some other woman's son has to go in Shirley's place?" asked the doctor. . . . / "No, it is not, doctor dear," said Susan defiantly. . . . "Do not you <WSD>put words in my mouth</WSD> that I would never dream of uttering. 
Meaning of the word marked with <WSD> tags:  To say or imply that someone has said something which they did not precisely or directly say.