If Zutara Won
The world had ended, so why had the battle not ceased? The Avatar had fallen silent in horror; Aang's mind was in free fall, spinning out of control, unable to grasp the impossibility. Katara could not love Zuko, the evidence of all his senses must be lying…
He had loved her- he loved her more than anything- the reason for him fulfilling his destiny and saving the world, was for her. Everything he did was for her.
When he saw them together his world was rent apart. His only thought was to run away. Aang was now flying through the air, and all he could do was hold, as tightly as possible, to that stick of wood that was his glider. He didn't even care enough to take Appa, anything that reminded him of happiness and her he wanted to leave behind. He heard the distant screams and yells of his companions. Aang did not turn back; he left without a care of knowing what happened to them.
He would never go back. Maybe, if he ran far enough away, he would no longer feel any pain. He kept flying, letting Aang disappear behind him. Days later, he felt the ground beneath his knees, and then the palms of his hands clenched the dirt. He hoped that he was fainting, but, to his disappointment, he didn't lose consciousness. The waves of pain that had only lapped at him before now reared in high up and washed over his head, pulling his under. Aang felt the tears building up and he no longer bothered to hold them back.
"No-no-no!" he was sobbing "No! Katara! No!"
Time passes, even when it seems impossible, even when each second aches and never seems to fade. It passes unevenly, in strange lurches and dragging lulls, but pass it does. Even for Katara.
Zuko's fist came down on the table. "That's it, Katara! I'm sending you home."
Katara looked up from her komodo chicken, which she was pondering rather than eating, and stared at her husband in shock. She hadn't been following the conversation- and she wasn't sure what he meant.
"I am home," she mumbled, confused.
"I'm sending you to your father, and brother, to the South Pole." He clarified. Zuko watched with exasperation as Katara slowly grasped the meaning of his words.
"What did I do?"
"You didn't do anything, that's the problem. You never do anything… maybe leaving the palace for a while will do you some good…Katara," he hesitated "Honey, I know how much you hate being cooped up in the palace every day, I know how much you miss traveling the world, and..."
Katara stood up and turned her back on her husband. Katara walked out into the Fire Palace's garden. She didn't want any more reminders of what seemed a lifetime ago. She used to visit another village every other day, and help people that needed her. When it was just her and Team Avatar… just her and her best friend.
She had many dreams about him recently. She will wake into a state of pain and semidarkness. She had not seen Aang since he defeated Ozai… no one has. The Avatar has disappeared from the world again. She knew why, but was never able to admit it. Yet alone, believe it was all her fault.
She remembered his face when he found her and Zuko Kissing. The memory of his haunting face, that she wants nothing more to rid from her mind. She couldn't take another second of it. She wondered how long this could last. Maybe someday- the pain would just decrease to a point where she could bear it. Katara knew deep down in her heart… she had made the wrong choice.