Callista studied him thoughtfully, almost forgetting her tea. "I think you need to learn to relax," she said finally.

"Yeah," he said, letting out a humorless laugh. "Sure. Right after you do."

She shrugged. "I'm not the one with the stress lines."

He arched an eyebrow. "So, you think I'm old, huh?"

"No," she said. "But maybe you're getting there."

He snorted.

"Come on," she said. "Loosen up."

"Easy for you to say," he muttered. "You're not the one who's got a reputation to protect."

"What ...