He had ample reason to be cheeky. After all he'd made her sing quite a bit only moments ago. She might not have said it in the same words however Natsu wasn't convinced she didn't feel the same way and why would he be?

"Well that's just cause we haven't had enough. Besides if we wash up and then get in the mood again it would all be for nothing~" Didn't she just absolutely hate it when he made good points?