[Katara is still disturbed from what she'd seen inside - there were so many of those blankets...

So although she's worried about Ben, her heart is cold, stomach still sick, and she's not trying to figure out why this might be happening for him. Really, what they saw is ample reason for anyone to be upset.

When he speaks, though, it tugs her attention back to him more fully.] ...I can understand that. [...] Although I think anyone has the right to be upset right now, even if it didn't bring up other things.

[There were so many sheets.]