Jack looked more than a little like the cat that got the cream.

"Oh was I now?" he said with a full of himself smirk and a sparkle in his eyes. "I'll remember that one, you know. Not letting you forget that. Maybe I'll even get a tshirt printed 'Jack Harkness is interesting' what do you think? Think I'd look good?"

He watched her then, a wide smile on his face, and his hand lifted to her jaw, holding her chin between his thumb and forefinger.

"Yeah, well you're not too bad yourself, kid," he said softly.