Sixteen year old Sirius Black sat alone in his bedroom. He was frustrated...So on edge. It was all her fault.

His desire was uncontrollable. He'd always been attracted to her ever since he was old enough to like girls, but this was just getting to be far too much. His hormones were raging. She consumed his every thought. He hadn't even slept in days. His eyes twitched. His body tingled. He was becoming aroused by the thought of imagining what it would be like just to touch her. He wanted her more than he'd ever wanted anybody or anything in the entire world. He had to have her.

No amount of young Gryffindor girls could slake his lust. He'd tried. But he could never get her off his mind, even as the stupid little school girls screamed his name while he fucked them like worthless whores. She was no worthless whore. Sirius thought her to be a goddess. The fairest of all. Almost too beautiful to look at. But god, he hated her. More than anyone. The feeling was mutual.

His heart raced when he heard footsteps outside his door. They were her footsteps...The door creaked as it opened ever so slowly.

"Your light is keeping me awake." Bellatrix stated, flatly.

Sirius was silent. He stood up, then slowly approached her. The buxom beauty that was nearly ten years older than him. She had on nothing but a short, black nightgown. He could only stare at her as though she were something to eat. Sirius did not care in the least bit that she was his cousin. That never mattered.

"You feeling okay?" she asked, raising an eyebrow.

"No." Sirius replied.

Bellatrix sighed, and crossed her arms. Her cleavage had become even more pronounced. Sirius' eyes widened. His heart rate began to increase. His cheeks flushed. His pajama pants felt tight. She leaned, and he could feel her hot breath on his ear.

"You don't look so good, cousin." Bellatrix whispered.

Sirius inhaled sharply. She began to circle around him, looking him over with a predatory gaze in her dark eyes. His heart was now pounding like a lab rat's. Bellatrix cackled on the inside. She knew how badly her handsome, young cousin wanted her. She had to admit, she was rather curious about him. Sirius worshiped her, yet he loathed her all at the same time. Either way, she was always on his mind and that pleased her.

Bellatrix nearly gasped when Sirius grabbed her shoulders rather forcefully, and pushed her against the wall. She tried her hardest not to show emotion in her face. She merely gave a smug smile, which he hungrily kissed before she could even say a word. He forced his tongue past her lips and into her mouth. She tasted even sweeter than he'd imagined.

For that, he received a shove. Then a hard slap to the face. It stung like hell, but coming from Bellatrix, it only turned him on even more. He hadn't really expected it to be that easy after all.

"Sirius, you naughty little boy! I'm your cousin!" Bellatrix hissed, angrily yet there was sensuality evident in her voice as well.

"So what." he responded, nonchalantly.

Once again, Sirius forced his hungry mouth onto her pretty red lips. His hands gently caressed her pale arms. He pushed his hips forward so she could feel his straining erection. Bellatrix bit down on his lip then grabbed a fist full of black, curly hair and yanked rather forcefully, breaking the heated kiss.

"You'll never have me." she teased, as her palms came up against his chest.

"We'll see about that." Sirius scoffed.

He unbuttoned his matching pajama shirt, and let it fall to the floor. Bellatrix eyed his well-sculpted body for just a second. Sirius did not miss this. He took hold of her wrists, and moved her hands over his defined abdominal muscles.

"I'm your cousin." she persistently reminded him, once more.

"I don't care." Sirius spat, as his hand rested on the back of her head.

Then he started to kiss her neck very gently. That turned into playful love nips, then hard bites that would surely bruise. Bellatrix sighed in pleasure. She could have hit herself in the face for that. Sirius on the other hand, mentally congratulated himself. He wanted to gloat, but decided against it. He didn't have her worked up enough yet. She could still just walk right out like the bitch that she was.

"You're disgusting. Incest is frowned upon by most people, my dear little Sirius." Bellatrix snarled, as though he were slow.

"Is that what you said to my brother?" Sirius replied, haughtily.

His trembling hands wound under the thin straps of her night gown and started to pull them down.

"I don't know what you mean." she said, denying anything he may have suspected.

"I know all about you and Regulus...Every little detail about how he lost his virginity to you. How he had you screeching his name. You couldn't walk when he was done with you...and you went back for more." Sirius mocked, as he slid her night gown low enough to make it pool around her feet.

"Regulus is much more handsome than you are. His hair is prettier. And I don't hate him." Bellatrix clarified, in her defense, as she kicked the useless garment of clothing out of the way.

The first statement, she'd lied about. Sirius didn't need to know that though. She leaned back against the wall, with a grin as he admired her. She was perfect.

"You want me, Bella." Sirius declared, curling as lock of her hair around his finger.

"In your dreams." Bellatrix fired back, quickly.

Sirius' fingers danced between her plump breasts, then trailed down her abdomen. Bellatrix felt a knot forming in her stomach. Now it was her heart that began to race. There was an ever so slight tingle in all the right places. Who was she kidding? She wanted this.

The young man's ears delighted at the sound of the adorable noises Bellatrix made as his mouth closed around one of her hard, pink nipples. He sucked eagerly, causing the tingle between her legs to become an ache. His hand slipped into her red, satin panties and stroked her clit. Now she moaned. It was even better than Sirius thought it would sound. His fingers trailed lower. She was already so wet for him. Sirius tried to hide just how heated and impatient he was.

"Liar." Sirius grunted.

Bellatrix wanted to leave so badly and give him nothing. That was what her mind wished for...But her body wouldn't allow it. Why in the name of hell did she want to her teenaged cousin, who she loathed, to fuck her? Now Regulus...he had been a different story. He absolutely adored her, and had practically begged her. So she was more than happy to do it. But why Sirius? Why Sirius?

"Fuck me." growled Bella.

Sirius wasted no time taking his cousin by the waist, and throwing her onto the bed. He climbed on top of her, panting like a dog and shaking with anticipation. Then hastily undressed the rest of the way in a matter of seconds. His dark eyes watched intently as Bellatrix slowly inched off her panties, then spread her legs for him. He settled between them, as he kissed her. The tip of his cock prodded against her entrance.

With no warning, he thrust inside her tight, wet core. Sirius let out a loud, desperate groan, while Bellatrix cried out in pain and delight. His rather impressive size hurt...But it felt so good. Sirius pounded her without mercy. For him, this was pure ecstasy. She moaned shamelessly, not caring at all how loud she was or who might hear them. He let out growls, grunts, and every noise in between, as he fingernails raked his back while he fucked her. Strong hands took hold of her hips, and went as deep into her as he possibly could. Bellatrix arched her back in an almost unnatural way. He'd just hit the right spot. He continued to push himself in, over and over.

"Harder!" Bellatrix demanded.

Sirius fulfilled her wish quite eagerly, and began taking her even harder and faster. Her trembling legs wrapped around him.

"Bella..." he groaned several times.

Sirius felt his climax approaching rather after just a few minutes. The bitch was loving it, and admittedly so was he. So much that he ignored the intense pain of the torn open skin on his back, caused by manicured fingernails that traced the same red, trails countless times.

"Sirius!" Bellatrix screamed.

She was close as well. Sirius' hand closed around her neck, not quite hard enough to cut off her air. He did not slow down or be gentle for a second. That was the way she wanted it...and the way he did as well.

Her climax was indicated by a nearly earsplitting shriek, and she tightened around him before losing all control of her body. Her eyes rolled back as she writhed wildly, and the look on her face said it all. That sent Sirius over the edge. He tightened his grip on her neck as he exploded inside her, and he was also quite loud. The sound of heavy breathing filled the room, as the two cousins did nothing but try to catch their breath.

Bellatrix soon pushed Sirius off her, then bolted out of the rather comfortable bed.

"I'm leaving." she stated, before he could tell her to get out.

"Good. I'm glad." he scoffed, stretching out casually as though nothing had happened.

"Whatever." she replied calmly, as she picked up her clothes and headed for the door.

"Bitch." Sirius scoffed.

"Dick." Bellatrix quickly fired back, slamming the door behind her.