Quentin Daniels sat on the floor, with his tray on his lap; he seemed completely at home, and he glanced up at her once in a while, grinning like an impudent kid brother who had beaten her to a secret she had not discovered.
He saw a sudden flicker in the boy’s face, an attempt at his old, bright, impudent grin.
Rearden rose to his feet by a long, cautious effort; he saw the tortured spasm of the boy’s features, as he settled him slowly against his chest, like a baby held tight in his arms-but the spasm twisted into another echo of the impudent grin, and the boy asked, "Who’s the Wet Nurse now?"
There are no more uses of "impudent" in the book.
Show samples from other sources
She is an impudent girl given to insulting strangers.
She has a certain genius, but her impudence makes it very difficult to work with her.