"Sokka."
Sokka turned to see Aang beckoning. Leaving a puzzled Katara, Sokka shrugged, climbing onto Appa's head. "What's up?"
Aang's voice was low, intense. "I talked to Katara first, but I wanted to apologize to you, too. I'm sorry for burning her – hurting her with an element that's done so much damage to your lives."
"You should be sorry." Aang looked down; Sokka instantly felt guilty. "Fine, apology accepted."
"Thanks," Aang sighed, voice painfully relieved.
"Just don't do it again," Sokka threw in, smug at having the last word and reluctant to admit how much the apology meant to him.