Author's note

This is a translate of my Spanish's fic "Fuego cruzado". So, consider that English is not my first language, and I would appreciate some advice on spelling, grammar and writing.

Disclaimer: Avatar and its characters do not belong to me (otherwise I would make Zucest official). The cover image is not mine either.

X—

Azula settled easily on her brother's chest. Zuko held his breath, feeling his face ignited in a fiery heat. Azula's mouth arched with sufficiency and a spark of highness shone in her goldeneyes. With her fingernail, painted in blood, ran through the young prince's chiselled abdomen, while resting all her weight on him.

"I missed you...," Zuko said in a barely audible sigh. He immediately regretted his words, but it was too late.

Azula's smile widened and her eyes became predatory.

"I told you. You can't live without me." With her other hand, pinch her brother's thigh, causing him a grimace of pain. "Poor Zuzu... when will you learn?"

Zuko growled in response. He had almost forgotten that his sister was fond of causing him wounds and lacerations during their encounters; they were never too deep, but Azula always made sure they were visible. The marks were a statement that it belonged to her, only her. He looked at her with inquisitive eyes, wondering if she too had missed him. Since he was exiled three years ago, there was no night when his mind did not travel to his sister's room; he used to spend his days at sea, remembering the giggles behind the pillars, the gazes of complicity, the secret kisses... With each memory, a thorn of guilt pierced his chest, filling his young body with shame and dishonor.

Azula looked fascinatedly at the pain expressed in her brother's features. If anything she missed were Zuko's sore grimaces and watery eyes, every time she marked him. She liked to mark him, reminded him that it was her Zuzu and no one else. Since he was exiled the days became bored and monotonous. Of course, she had Mai and Ty Lee to mark, besides all those dirty servants of the palace; but none matched the grimaces of her Zuzu. Oh, how she had longed to have him at night to make him cry, to make him suffer. His suffering filled her, made her feel a strange warmth in her chest that intensified with her heart rate.

The prince waited patiently for his sister to finish marking his thigh. It was always the same: she marked him, and he tried to withstand the pain. It was a game that started the first night they're mother disappeared. Zuko would try to prove to Azula that he was able to withstand any pain, but he always failed. This time, he said himself, he would finally beat her in their twisted game.

Azula laughed when tears began to form in her brother's righteye.

"So fast, Zuzu" she whispered in his ear. "I'm disappointed...".

Zuko clenched his fists and tried to suppress the water from his eyes. Azula pinched more forcefully, this time applying a spark of fire, and he had to bite his tongue to avoid sobbing. His tactic was damaging, judging from the metallic taste in his mouth that spread with a stabbing pain on his tongue. His sister's expression showed nothing but her natural tallness, but Zuko knew she was enjoying this. That thought brought warmth to his chest, a guilty but pleasant warmth. He knew this was wrong, that they were both sick; but Zuko surrendered to his illness long ago.

Suddenly, his sister's lips were on his. Zuko's repressed sob turned into a hollow murmur, which almost causes him to chokee with his own blood. His fists contracted more strongly, refusing to hug her. The game was not only about Zuko enduring the pain, but also of enduring his own lust.

Azula tasted the copper in her brother's mouth. She moved her tongue against his with anxiety and experience. Sucked Zuko's lower lip, and his sore groan made Azula's crotch scream in ecstasy. The princess broke the kiss as fast as it started. She mocked Zuko's disappointed grimace before focusing her attention on his left eye: the mark they're father left on him. She couldn't stop her eyebrows from contracting in a furious frown. This mark shouldn't be there, it was supposed to only Azula could mark him. Not even Father had the right to do so. Azula always make sure to leave his face clean: she was reserving it for a special occasion. This mark must have been caused by her.

Zuko shuddered under his sister's piercing gaze. He wanted to know what she was weighing, to know if she felt at least a shred of affection for him. The fact that Azula was looking at her scar with that ferocious deanship that only she knew how to use, made the shiver even more disturbing; she would never get used to people's prying eyes every time they saw her face, but his sister's look was different, as if trying to pull him out the scar with her eyes.

The hand of Azula abandoned the prince's thigh and held his face with both hands. Zuko's muscles were strained at the movement, and his eyes remain fixed on Azula's. She passed a finger through his scar, her touch resembling that of a spidersnake. No one had ever touched him like that on his scar, and for Azula to be the first to do so, was embarrassing and painful. Unable to resist the puncture in his chest, Zuko broke the rules and put his sister's hands away.

"What?" Azula mocked. "Don't tell me it hurts, Zuzu. I didn't think you'd be so sensitive".

Zuko's face contracted in a sore grimace before acquiring a furious tinge, rising on the spot no matter how his sister fell backwards. The princess frowned as she stabilized, was about to claim her brother, but Zuko turned his back on her.

"It's good to know you haven't changed!", he speculated the eldest in a mixture of growl and wailing, like the cry of a turtleduck.

Azula could not help the heatwave that her brother's pout caused in her.

"Oh, come on Zuzu", she purred by putting a hand on his shoulder. "We're having fun".

Zuko growled and pushed his shoulder away violently.

"You mean you're having fun. I...", his voice drowned in his trachea. "Just forget it. It doesn't matter".

Azula's eyebrows contracted, but it was not because of Zuko's replica, but because of the pull of something unknown on her chest. It's been a long time since she felt that tug, ever since her mother disappeared... Azula instantly turned away the thought, it was the past and she had buried that woman in the back of her mind. Besides, she didn't want that pain now, it was supposed to be just for the two of them tonight, she'd been craving it for three years, and she wasn't going to let a nonsense ruin it.

Azula touched Zuko's shoulder again, this time with determination. Zuko writhed trying to get out, but Azula wouldn't let him.

"Don't you want to touch you?" she asked shortly.

Zuko turned his head to focus his eyes on Azula's.

"You want to touch me?", his voice was just a thread, "touch... this?"

Azula's lips curved in a strange smile for her face; she always smiled, but they were curelous smiles, sarcastic and terrifying, this smile was almost... nice. Her thin eyebrows rose and the predatory glow in her eyes was replaced by a blazing sun of comfort.

Zuko had never seen such an expression in Azula, it was almost as if he were conveying kindness. And asked himself if he had gone mad or if he was dreaming. "Kindness, from Azula?"

"I never touch anything I don't want, Zuzu," Azula said, stroking her brother's chin. "And I've already touch it, don't I?"

The prince's eyes opened with surprise and his heart danced in joy. A blush spread across his cheeks, but he refused to let it cover his whole face; fortunately, the dim light would cover his weakness towards Azula. He turned his body slowly to the height of his sister.

It seemed that time had stopped, at no point did they're eyes leave the other. Finally, they're lips were touched tenderly. They've never kissed like this before. All they've kisses were always hard, rough, rough. Somehow, this kiss lit a flame in the hearts of both brothers, a flame they didn't even know was there.

Azula surrounded Zuko's neck and Zuko reciprocated holding her back. As always, Azula took the lead and her tongue was the first to demand to enter her brother's mouth. Zuko slightly opened her lips and his tongue found Azula's; stroking each other gently, making slow, sensual movements. They separated when felt an electrifying spark running through their bodies but kept close.

Zuko passed a hand through his sister's ear, pulling away her dark locks.

"I missed you, Azu" he said with a smile. This time he didn't regret saying it.

A giggle escaped from Azula's lips and Zuko's heart melted. It was the most harmonious sound he had ever heard.

"If you tell anyone..." The princess's fingers stroked her brother's scar, a delicate but threatening touch.

"I know" he ended up squinting. "It's our secret".

In the morning, they would both decide what to do about that electrifying feeling. The only sure thing was that tonight they both would enjoy each other; Zuko would forget the guilt, shame, and dishonor that judged him every time he laid eyes on his sister's body; and Azula would focus on reclaiming her brother's body as many times as she wanted, no matter what her father would do if he found out about her nightly encounters with Zuko.

The room danced to the sound of blue and orange flames. For the first time in a long time, the smiles of the prince and princess of the Fire Nation were sincere with each other.

X—

Author's note

Hello, there, warden here. If you've come this far you're likely, like me, to enjoy this bizarre couple or at least find it moderately interesting enough to read the previous paragraphs. I know it's not the best one-shot in the world, but I like the way it turned out. I tried to keep them both inside the character, but I strayed a little. Still, I hope you enjoyed reading this. I also hope my English writing skills are not as bad as I think. Feel free to leave a criticism of the story and the writing.

Since I finished seeing Avatar last year, Zuko and Azula's relationship seemed interesting in different ways, so I started reading fanfics that would treat their relationship as siblings; of course, one thing led to another and I ended up reading some Zucest fanfics and well, here's the result.

Now, I want to point out that the part where Azula touches Zuko's scar and says "Inever touch anything I don't want, Zuzu (...)", as well as the previous reaction of him, is not an original idea. I basically pulled it out of a Russian fic, from the site Ficbook. net; that fic it's also Zucest but the interaction between the two is a little different. For those who are interested, the fanfic is called "Самаячистаяправда - самаяоткровеннаяложь", "The purest truth is the most outright lie" (I hope it's okay because so says Google translator). The link is:

ficbook.

net

/readfic/2390459

And well, that would be it. Let me know what you think of this little fic I came up with.

Read you next time.