Almost choking on water? A good enough reaction to answer his question. That and the way Gavin had been looking at Maxwell the entire time they were dancing? It was easy to piece together that Maxwell had been the noble Gavin had been talking about a while back, blush reddening his ears during the conversation.

Also the way Maxwell is trying not to grin and how happy he had looked spinning around with the Elf? Kind of reminded him of how he felt and probably looked around Krem.

"Is that a 'no, you're not going out'?"