"Legal age?" Right, that's a thing in some places. Though if he thought that would get him off the hook, he's wrong: she's scrutinizing him with even more interest now. "And what's that?"

In fact, she seems more invested in the conversation than she is in the party hats, herself -- though she's started working on them, her hands still as quick as ever. Better not get too distracted with conversation, Kazuma...