She gave me a small, knowing smile as I sat down next to her.

She gave me something intended to be a hard, knowing smile.

Then she tipped it and gave a small, knowing smile.

He closed his mouth and gave me a smug, knowing smile.

Then, her lips changed from an innocent expression to a straight, knowing smile.

Death tore his gaze away from that fresh, knowing smile.

There was a faint, knowing smile on his companion's face.

And Irene's face, now that he noticed, had a strange sort of knowing smile on it.

She put him at ease at once with her knowing smile.