I know, I know. Don't worry, I've already made a 'no-spoilers' vow to myself. [ He winces a little when he thinks about how awkward he had made things for Katara before, but is quick to perk up. ]

But since we've got a few years on them, aren't we basically their big brothers? We could take them in, Mako! Like we took in Kai!

[ Like he basically proclaimed Kai to be his little brother within a few minutes of meeting him. ]