You should do that more often," he said. "Laugh, I mean.""I know." But that...

You should do that more often," he said. "Laugh, I mean."
"I know." But that sounded sad, and she didn't want to be sad, so she added, "I don't often get to torture grown men, though."
"Really?" he murmured. "I would think you do it all the time."
She looked at him.
"When you walk into a room," he said softly, "the air changes."