"Mai," he politely corrects under his breath without interrupting her.

"I don't know, it just kind of did. I don't know if it's this place and the things that can happen here that can't happen at home, or if it's something she's always thought. When I..."

But that thought doesn't get finished. Instead it just sort of ends in a deep calming breath.
When Aang thinks back about that night on Ember Island, when Katara said she was confused, he can't help but think about how stupid he was to kiss her that way...