Ever since Katara had visited Aang's home she had been thinking a lot about what he had told her. Or about what he hadn't told her. Aang had caught her staring at him with an absent look on her face many times already. But still, she didn't ask him about his secret. He had said that he had made a promise. Katara didn't know to whom, but she knew that Aang never would break a promise. And he had also promised her that he would tell her, so she knew that he would. But right now she just tried to enjoy the time that she could spend with him.

Katara and Aang were walking towards the history class when they suddenly heard noise from the other end of the corridor. People were moving away and they heard the sound of someone who came walking in heels. Katara realized who it was and tried to pull Aang to another direction.

"Come on, Aang, let's go!" She said. But Aang didn't move. He stared at the person who was coming. Azula.

Azula was the firelord's daughter and Zuko's sister. But unlike him, she took advance of her position. She always did like she wanted to, and she never cared about what the teachers said. And everyone in the school feared her to much to argue with her. She didn't even wear the school uniform, instead she wore her royal cloths.

Katara had never liked her. Once in middle school, Azula had been scaring some younger kids. Katara had felt sorry for the kids and she told Azula to stop. Azula got really angry when she realized that Katara was telling her what to do. She was going to firebend at Katara to teach her a lesson, when a teacher saw them. Azula got detention, and ever since that she and Katara had been enemies.

Azula walked towards them with an evil smile. She stopped in front of Aang.

"Step aside, jerk." She said.

"Why don't you just walk around me?"

"Because, I'm the Fire lord's daughter and you should show me respect."

"So? Zuko is the Fire lord's son, and heir to the throne. And he doesn't demand me to show him respect."

Azula's eyes narrowed.

"How dare you compare me with Zuko? He is a failed coward! A shame for his family!"

Katara saw how Azula's firsts started to smoke. The school bell rang, telling them that their class was about to begin. Katara took Aang's hand.

"Come on Aang, our lesson is about to begin!"

Azula turned her face towards Katara. She gave her an evil smile.

"So, this is the best of a boyfriend you could find for yourself? Pathetic!"

Katara knew that you shouldn't argue with Azula, but her words really hurt. Katara got angry.

"At least I have a boyfriend! It's not like I have scared away every boy I liked!"

Katara walked away, pulling Aang with her. Azula watched them walk away. She examined the boy. There was something familiar with him… She saw how he took Katara's hand, and suddenly she got it. His tattoos! Azula's eyes widened. But then she smiled evil. Those two were going to regret that they insulted Fire princess Azula.

oOoOo

Katara was sitting at their usual table in the cafeteria. She rolled an apple in her hands, and her thoughts were far away. Why had Aang looked like that at Azula? It had been like he recognized her. But he had only been going in this school in like two months, and Azula hadn't been here for more than a week. Her father had wanted her home by his side, so she started the school year a little bit later than everybody else. She felt sorry for Zuko. His father hadn't asked him to stay at home. The Fire lord had never treated Zuko the way he treated Azula. Zuko pretended that he didn't care, but Katara could see that he was hurt.

"Hello."

Katara winched when Zuko sat down beside her.

"Oh hi. I was just thinking about you."

Zuko cheeks tuned read and he looked away.

Katara rolled her eyes. "I was thinking about your relationship to your dad."

"Oh. Why would you think about that?"

"Aang and I met Azula today."

"That is nice… not."

Katara sighed. "Aang acted really weird. He looked at Azula like he knew her, but she didn't seem to recognize him… Do you think that there is any chance that they could have met before?"

"I don't think so… My father hates the air nomads. There is no chance that he would have let me or Azula socialize with them as kids. And Aang just moved here so he shouldn't have been able to meet her before."

"Why does your father hate the air nomads?"

"Because of the biggest failure in the history of the Firenation. The Firelord Sozin tried to wipe out the air temples hundreds of years ago. But the air nomads were prepared, and their avatar was with them. They defeated the soldiers, and took the throne from Firelord Sozin. He was expelled from the Firenation, and was killed by some earthbenders a few years later. His brother ruled the Fire nation after that. But he died childless, and they had to give the throne to Sozin's son. He hated the air nomads for what they had done to his father, and every Fire lord after him has kept opposing the air nomads and the avatar."

"Wow. I didn't know that."

"No, the Fire lords keep their hate a secret. But now, the avatar will ones again be born into the air nomads. Ones again, the Firenation have to remember they biggest failure. If I were Aang, or any other airbender, I would be careful. You never know what the Fire lord can come up with when his honor is hurt."

"Hello guys."

Both Katara and Zuko winched. They hadn't realized that they had been sitting close to each other, whispering. Aang looked confused at them.

"What were you talking about?"

"Nothing!" Katara said quickly before Zuko got to say anything.

Aang looked like he was going to ask more, but then he just shrugged and sat down next to Katara.

oOoOo

It was a warm day, so Katara, Aang, Zuka, Mai and Toph was hanging out in a park after school. It was the same park where Aang and Katara had kissed for the first time. They lay on a lawn not far from the fountain. Katara was lying on her side next to Aang and she slowly moved her fingers up and down the line on his arm. Aang had closed his eyes and were enjoying her touch. Toph looked like she had fallen asleep and Zuko and Mai was sitting under a tree so that Mai wouldn't get sunburn.

"It's really starting to get hot." Aang mumbled.

"It's always hot here." Katara sighed. "I miss the south pole."

"Why did you move here in the first place?"

"My dad got a job here when I was a kid. Since then we have been living on the south pole at the summers and the rest of the year here."

Aang sat up. "Does that mean that I won't see you under the entire summer?"

Aang looked horrified but Katara smiled.

"It's a long time until summer, almost a half year! Don't worry so much."

She placed her hands at his chest and pushed him back down. He pulled her with him so that she lay half on top of him. She kissed him lightly and then she looked him in the eyes. He was smiling now but she could still see a little bit of concern in his eyes. Katara regretted that she had told him that she was going to be gone all summer. She realized that this was how Aang must have been feeling when he told her that he was going to leave after two years. Aang reached out a hand and caressed her cheek.

"What are you thinking about?"

But before Katara could answer before they heard Zuko scream.

"Watch out!"

Aang jumped up and created an air shield in front of them. The shield was hit by a fireball. Katara gasped and got up quickly. Azula was walking towards them

"Waky waky." She said with an evil smile.

"Are you crazy? We could have been hurt!" Katara yelled at her.

"Yeah! What do you want, Azula?" Zuko had walked up to them, and he looked coldly at his sister.

"I'm not here for you, Zuzu. I'm here to deliver a message to… Aang."

Aang looked surprised. Azula held up a letter and he took it. But he didn't open it. Azula shrugged and walked away. They watched her until she was out of sight. Then they all turned towards Aang.

"Are you not going to open it?" Mai asked.

"I don't know if I want to know what it says." Aang put the letter in his pocket.

"I can't believe that Azula just shoot fire at us. She is crazy" Katara said upset. Toph and Mai nodded in agreement.

"Katara, she knew that one of us would stop it. She wasn't actually trying to hurt us." Aang sighed.

He sat down on the grass. He was holding katara's hand, so he pulled her down as well. Zuko and Mai returned to their spot under the tree. Toph lay back down to take another nap. Aang also lay down on his back and watched the sky.

"Why did you defend Azula when I said that she was crazy?" Katara had to ask.

"Well… even if Zuko hates her, she is still his sister. And I don't think that you should be insulting her right in front of him."

"Oh… you are right." She turned to him and started to caress his arm again. "Is that… the only reason?"

Aang looked at her. He wrinkled his eyebrows.

"What do you mean?"

"Well, this morning when we saw Azula you were acting weird. You acted like… you knew her."

Aang reached his arms and pulled her to his chest. Katara looked him in his eyes, waiting for an answer.

"She is the Fire lord's daughter. Of cause I knew who she was."

Katara didn't know what to say. She understood if he had recognized her, but it was more than that. She knew that there was something else that had crossed his mind when he saw Azula. She just didn't know what it was.

"You are beautiful." Aang said.

He caressed her cheek. Katara saw that he had been watching her when she was thinking. She smiled and kissed him. He curled his hand caressed her back, but then he pulled back.

"I have to get going. I have a lot of homework for tomorrow."

He sat up and took his school bag. Katara watched him walk away. He stopped at the fountain. Katara saw how he opened the letter from Azula. He stood still for a moment and read it. Then he suddenly crumpled up the letter and threw it into the fountain. Katara waited until he had walked away, and then she walked to the fountain. She waterbended the letter up from the fountain, and then she pulled out the water from it. She felt bad for reading Aang's letter, but she didn't want more secrets in her relationship. She had to know what Azula had to say to Aang. She glossed the paper and was surprised to only see two sentences on the paper.

"I know what you are. Your secret isn't safe anymore."