It was late one night a few weeks after her birthday that Azula found it hard to sleep. She would constantly toss and turn where she laid in her king sized bed trying in vain to relax. She had drunk a glass of warm milk, meditated, and even went through some basic stances but nothing would relieve her of this all consuming desperation. It was a persistent heat that spread through her limbs, drawing her attention to less than appropriate desires.

She let out a heavy sigh, flipping onto her back to stare up at the canopy of her bed. Ever since that kiss with Zuko and their dance…she couldn't get him out of her head. He already occupied every inch of her consciousness whenever she had a moment to herself. Now she had THIS to deal with and it was all because of him.

Azula never usually allowed herself to feel many emotions but in this time frame where there was nobody to witness this side of her, she let the mask slip off. Instead of resisting like she had been the last hour or so, she gave into her thoughts, breaking down the wall that already had chunks removed from it. Zuko was the first thing to come to her mind naturally. She hesitated but let him through a second later.

Why did she care so much for him…?

She guessed that was the first thing to answer.

Azula thought about the person her brother was. He was hot-headed, impatient, secretive and annoying. Everything she could do without. She was tempted to shut off her mind but it kept pushing through. She thought of the way he put so much trust in her even though she had given him reasons not to. The way he looked at her with that fire in his eyes was enough to warm her cold heart. His strong arms wrapping around her body holding her close made her feel safe. The touch of his lips upon her skin sent pleasant sensations through her. Zuko was more than what she used to think: he was also kind, loving, protective, and selfless.

A memory of their night dancing under the stars sent a smile across her face. She closed her eyes, savoring the pictures that flickered through her head. Another night on a beach spread through her mind like a slowly growing fire. Her heart rate increased as she thought about the way his hands had groped her and the places a brother should never have his lips. The sheer pleasure she had felt made its way through her imagination and into reality. The heat she had been feeling before increased and kept growing the more she gave in.

Pleasant warmth made its way between her legs making her bite her lip. What would Zuko think if he knew just how much he had control over her? That kind of weakness was a dangerous one to have but it was way too addictive to stop. Her cheeks reddened at her own erotic thoughts as she imagined him sticking his fingers inside of her, dragging them in and out at random intervals until she started to breathe heavily.

On instinct, Azula's left hand traveled down her slim body and under the robe she wore. They slid a bit further reaching the lining of her black silk panties. Her fingers edged closer to where her hot wet core needed attention. She stopped suddenly, realizing what she was about to do. Opening her amber eyes, she stared at the shadows flickering on the canopy over head from the torches on her wall, listening to the deafening beat of her heart.

Are you that pathetic? She berated herself internally, hating the sensations that her body was creating just in reaction to a few memories. She didn't want to admit it but she needed him…maybe 'want' was a better word. Either way this feverish desire had to be relieved and there was nobody but herself to do it.

Azula hesitated for a moment before giving into her sinful thoughts. Just as Zuko had done to her, she rubbed herself gently, increasing the speed and pressure as her desire grew. A soft moan escaped past her lips as she continued, thinking how Zuko had touched her in a way that drove her insane. She could feel how wet she was and it was for her brother no less. The realization through the hazy fog of lust made her irritated but the moment was brief, for in her mind's eye he was there, caressing and whispering in her ear of how much he loved her. The sounds escaping her mouth rose in volume as her climax neared.

"Oh, Zuko…"

A loud knock on her door made her jump. Her eyes opened wide in shock as she retrieved her hand. "Gods damn it…!" she hissed to herself. Sitting up, she glared at whoever was on the other side of that door, annoyed beyond belief that she had been cut short from freeing herself of this dark need within.

Getting out of her bed, she re-tied the sash tightly around her waist before closing the distance to the door. Grabbing the knob she opened it "I swear to Agni there had better be a good reason for-" She stopped her harsh words, realizing that the person who stood before her was the very same one she had been fantasizing about a only moments before. "Zuzu? What are you doing here?" She felt her once calming heart pick up speed again.

"Azula…" Zuko muttered, his fists clenching at his sides. Azula eyed him warily, picking up on how tense he was. Looking into his eyes, she could read what was unspoken. It took only a second for her to register what this was all about. "Damn it all."

Without warning, Zuko pulled her towards him by the arm, locking his lips with hers. Azula had no time to process this as he pushed her into the bedroom, closing the door. Turning her around, he pressed her body up against the wall, slipping his tongue into her mouth. Azula's eyes glazed over, not giving a damn why this was happening and only caring that it was. She responded with eagerness raking her hands through his unruly hair to hold him closer.

Zuko then kissed down her cheek, jaw line, and to her neck, sucking and biting her creamy skin. He pressed his erection into her, making her moan. Grinding her hips in response to what she needed, he grabbed her waist to hold her as close as possible, never wanting her to stop. He ceased his relentless kissing to breathe heavily, causing goose bumps to rise along her skin. "Azula I need you…right here and now. I can't get you out of my head…" His hands traveled up her body, slipping underneath her robe to grope both her breasts. He resumed his attention upon her neck to bite at her skin.

Azula could feel the heat returning and her body aching for his touch and everything he had to offer. "Going after your sister to pleasure yourself? How inappropriate…" she whispered seductively, allowing her hands to roam his muscular chest.

Zuko smirked, bringing his face up to hers. The confidence in them made her shiver "I think we both know that you want this just as badly." Not allowing for a response, he kissed her roughly, pinching her nipples between his fingers.

Azula swallowed her sounds of pleasure and instead bit his lip in response to his words. He gasped in pain as she drew blood, making him pull back. Curling her lip she sneered "Don't begin to presume what I want." She then licked the wound she had inflicted, sucking up the oozing liquid in response to her less than harsh behavior.

"Then was I wrong…?" Zuko murmured, dragging his right hand down her body to the lining of her panties. Her breath hitched, as he slid his hand further so that his fingers danced lightly above her pussy. That tantalizing sensation was too much but she refused to respond. He slid his middle and ring finger in between her already wet folds. Stroking her once he elicited a muffled moan from her before pulling his hand back to examine the secretions her body had created. "It looks like you were already way ahead of me." He looked down at her with gleaming amber eyes, licking up the mess on his fingers. "I shouldn't have expected anything less from you."

Azula felt her face heat up but didn't let it show "And you weren't…?" She reached down his pants with her left hand to grab his erection, allowing her nails to dig in slightly, loving the way his face twisted with both pain and desire. "You must have been or else you wouldn't be here." She stroked him slowly loving the groan that he couldn't hold back. Wanting to please him more, she took her hand to her mouth, coating it in saliva before resuming her work. The sleekness of her hand against his rigged cock made the experience for both of them more pleasurable. This was the first time she had actually felt her brother up and she was happily not disappointed. The action itself was turning her on even more.

"No. I guess not." Zuko growled as he locked his mouth with hers again, picking her up to which she wrapped her legs around his waist. Holding her against the wall, he ground his hips so that his erection was rubbing against her clit making her lose the control she never had to begin with. Breaking their kiss he hissed "Fact of the matter is that I can't keep myself from you anymore. I know you feel the same…" Using one hand he pulled aside the top of her robe so that her right breast showed. "Admit it." Leaning down he began to suck at her greedily.

Azula's hands held his head closer as annoyance raked through her mind at how much he could read her. No one should be able to. "There's nothing to admit, only that my brother has this sick obsession with feeling me up." She panted lightly, loving the sensations he brought.

Zuko bit her suddenly, making her yelp with both pain and pleasure. Lifting his head back in level with her he gave a wolfish grin "Don't lie to me Azula." Maneuvering so that he was holding her with one arm, he let his other hand slid back under her panties.

Azula bit her lip as he shoved his fingers within her harshly. She gasped as she felt him hook his fingers within, hitting her G-spot causing a wave of overwhelming pleasure through her body. "Yes brother!" She whimpered, feeling her dormant climax creeping back. "I need you. Please don't stop…don't leave."

"I never will." Zuko whispered before kissing her gently. Pulling his hand out so that he could hold her properly, he carried her to the bed. Never breaking their passionate kissing, he laid her down on the maroon bed sheets climbing atop her. Pulling back he gazed at his sister, loving the light flush upon her cheeks and the softness in her eyes that he rarely got to see during the day. He took in her disheveled appearance, from her raven hair spread out around her head to the robe that was nearly falling off, teasing him with partial images of her nude body below. Azula gazed back up at him with both hunger and, dare he say it, love.

Not wasting more time, he sat back on his knees to tear off his own shirt, the shadows from the torch light accentuating his toned body. Azula reached for her loosened sash, undoing it, before she slid her fingers under the fabric on her shoulders to slide it off. Zuko's eyes roamed her naked body, taking in the curves of her breasts, toned stomach, to the forbidden fruit below.

How had he resisted this long? The thought baffled him.

Azula's hands roamed over her luscious mounds, stomach, until they reached her sopping wet core below where she slid her hand in between to stroke herself. "What are you waiting for Zuzu? Not going to back down now are you?" She let out a moan as she hit her clit which sent vibrant sensations through her.

He scoffed, trying not to show how nervous she made him "I'm just admiring what every man in the Fire Nation will never get to see." With no more words spoken his mouth captured hers. The siblings wasted no time in battling for dominance, Azula having pinned him down before he flipped her over a moment later, using his weight against her. With his right hand, he grabbed her wrists to hold them above her head, while his fingers of his left teased and taunted, rubbing her clitoris until she writhed below him. The moans she tried to hold back were futile. This show of dominance turned her on even more.

"Enjoying yourself…?" She hissed, as her hips bucked on instinct, briefly hating the smug grin on his face.

"Are you…?" He plunged his fingers inside her suddenly, listening to the cry that escaped her. "I'm guessing you are." He smirked.

"Fuck off." She groaned, as her arms tried to fight off his strength so that she could over power him but it was no use.

"How bout I do this instead…?" Zuko ceased his actions to pull off the pants he had on. Carefully, he positioned his cock so that the tip brushed her heated center. The subtle touch drove him crazy.

With her arms free, Azula wrapped them around his neck to pull him closer, shuddering with anticipation of what was to come. In that moment, she realized that this was more than just a one night stand. The electricity that danced between them told her that this was something beyond comprehension and that thought made her smile genuinely. Gazing into his eyes, she took in the honest emotions that he displayed to her "Zuzu…I…" the words she wanted to say would not be spoken but they didn't need to be.

"I know Az…" He locked his lips with hers as he plunged into her. She moaned loudly, instinctively grinding her hips. Eager hands roamed each other's body, feeling what they hadn't in a long time. He pounded into her harshly but she loved every second. The sweat beading on their bodies glistened from the fire around them, making the friction even better. It didn't matter that what they were taking part in was sinful. That shared blood didn't mean anything to the siblings lost in their unusual relationship. That fine line between what was right and wrong mattered less to what was actually being felt between them. The fever that had been growing and spreading had erased any rational thought on the consequences of this action. All they cared about was each other.

Zuko's pace picked up speed, loving the tight grip and slick coating around his dick that sent waves of pleasure through him. Azula's cries below told him that she was close just as he was. He didn't dare stop to catch his breath, losing himself to the temptation he had resisted for so long.

Azula couldn't hold back anymore as the fire within over whelmed her. Reaching her climax, she screamed, the torches flaring widely around them. Zuko ground her mercilessly, making the pleasure between them intensify as they lost themselves to the addicting sensation. The fire around roared to life, chasing away the darkness that surrounded the two siblings but even that could not scare away the shadows within themselves. The intensity of heat eased as they came down from their high. Zuko couldn't support himself as he relaxed his body on top, resting his head upon her breasts.

Azula kissed his head, gliding her fingers through his sweaty hair. She processed what they did, realizing that it would have happened sooner or later. Even though Zuko had insisted that it would never happen again, even he could not resist the pull that existed towards one another. Right now, she wasn't sure of what their future held but it didn't matter. As long as she had him, she knew they could survive whatever fate they were to face.

Zuko moved to lie on his back pulling her with him so that she rested her head on his chest. Azula listened to the beating of his heart in time with hers. The sound was hypnotic, making her relax. She smiled before she reached up to kiss him, closing her eyes for a moment to savor the taste upon her lips.

Breaking their kiss, they gazed into each other's eyes. Azula caressed his face as Zuko's hand brushed through her hair, the pleasant sensation causing her eyes to glaze over. Kissing her forehead he laid her head back down continuing his attention to her. A rush of exhaustion weighed her down as she gave into the sleep her body needed. Zuko spoke quietly to her, whispering of how much he loved her and that was the last thing she heard before darkness swept over.