Aw, isn't that sweet? Tidus's expression softens all the more to imagine it; a warming conversation despite the cold they're heading into. It's better than all the mess they just suffered.

"That sounds like fun! You taken care of any younger kids already? Any brothers or sisters?"

Or just plain old babysitting? He doesn't remember Madoka mentioning any siblings, but then, maybe she got to take care of someone else's younger kids. Get the older kid to look after the younger ones.