AN: Hi there, I'm sorry for such a short chapter but I'm exhausted and I cannot write another word...I hope you can fogive this poor author...I thank you all for your lovely reviews and stuff they makes me happy. :) Please continue to enjoy...thanks.

All my life, my heart has yearned for a thing I cannot name.
- Andre Breton

Harry woke at dawn and spent a minute admiring Sirius while he slept, but as the sky turned pink he leaned down and planted a soft kiss on his lips. Sirius mumbled and slowly opened his eyes, when he saw Harry he grinned and yawned. "What time is it?" He muttered, rubbing sleep from his eyes.

"Just past dawn I think...we need to get up and get back to the castle."

"Ugh...I'd rather stay here forever." Sirius grumbled, burying his face between Harry's neck and shoulder. "The world can go fuck itself...I'm happy right here."

Harry chuckled and gently extracted himself from Sirius' arms, he slid from the bed and Sirius moaned petulantly as he spread himself out like a starfish and whined. "Sirius, we have school..."

"But I don't want to go to lessons! I want to stay right bloody here and never move for the rest of my damned life! I want to do nothing but have sex with you for eternity, is that too much to ask?"

"Wouldn't that get a bit repetitive, not to mention sore?"

Sirius opened an eye and huffed so his fringe fluttered. "No. I'd love every bloody minute of it. Now come back here!" he pushed down the duvet to reveal his body, he smiled lazily and watched Harry's eyes move over him greedily. "Come on, once more won't hurt...we can skip first lesson, and no one will be any wiser..." He lifted an arm and beckoned.

"Don't make this harder than it already is..." Harry muttered hoarsely.

"Oh I plan on making it extremely hard, Harry..." Sirius sat up and crawled to the end of the bed where Harry was sat, he snaked his arms around him and tugged on his earlobe with his teeth. "Come on...once more, for luck?"

"What do you need to be lucky for?"

"Ok, if not for luck, I need wank material..."

Harry choked on a laugh. "Do you take anything seriously?"

"I'm very Sirius." He giggled and Harry shivered pleasantly. "Go on...please, please, please?" Sirius' hands slid down Harry's chest as he nipped and bit at the back of his neck. "I can't go to Arithmancy with a hard-on..."

"Sirius..." Harry closed his eyes as he felt Sirius' hands sliding downwards; he swallowed the lump in his throat.

XXXHPSBXXXHPSBXXX

"Harry, where on earth have you been?" Hermione exclaimed as Harry came to a sudden halt by her side as they stood outside their Potions classroom.

"Sorry..." Harry gasped. "I got...held up..."

Hermione narrowed her eyes and scanned him shrewdly, his hair was even more a mess than it normally was, his shirt hung out of his trousers and his tie hung low around his neck. He looked as if he had dressed in a hurry and he had dust in his hair, it was caught in the sleeves of his robes as well. "You weren't in the Dorm last night either, mate...where have you been?" Ron asked, looking him up and down. "And where's your bag?"

"Oh crap!" Harry swore loudly gaining the attention of his classmates and a disproving frown from Slughorn who had just opened the door. There was a soft chuckle and they all turned to see Sirius holding out Harry's bag with a smirk on his face, Harry snatched it off him but was unable to keep his own smile completely of his lips.

"Now then, shall we begin?" Slughorn said jovially as everyone seated themselves at the desks. Sirius managed to sit with Harry by shoving Ron to the side and sitting down quickly before anyone could say anything, Ron shot him a hurt look before sitting beside Hermione.

During the lesson Harry spent the best hour of his life laughing and flirting with Sirius who had him in hysterics when he decided to make the world's most powerful Aphrodisiac instead of the Gangrene cure they were supposed to be making. It came out perfectly, with its smooth, thick texture and the colour of rose petals. Sirius leaned over it and sniffed. "Wow..." He muttered wincing slightly. "That is powerful..."

Harry's eyes widened as he watched the steam rise and fill the room like a thick, scented fog. It smelt like liquorice and cinnamon and had the boys blushing furiously and looking exceedingly uncomfortable as Sirius roared with laughter, he fell off his stool he was laughing so hard. Harry giggled along with him, but made sure to stay resolutely in his seat to save himself some embarrassment. Hermione was flushed pink and gazed sternly at Harry, Ron had buried his face in his arms and was refusing to look at anyone and Draco Malfoy had sunk so low in his seat that his eyes were level with his desk.

Slughorn ran over and tisked irritably. "I say, I didn't tell you to brew this...come now Mr. Black, let's not embarrass your fellows." With a wave of his wand the cauldron emptied and there was a general sigh of relief. "Well, I must admit that was a rather brilliantly made potion, twenty points to Gryffin-Slytherin, however I must remove points for making the wrong potion so you will be awarded ten."

Draco was smirking as he realised that Slytherin would be getting the points instead of Gryffindor. When they had finished the lesson Sirius and Harry left the room together, their fingers brushing lightly as they walked and smiles on their faces. Suddenly something grabbed Sirius' sleeve and pulled him back, he found himself face to face with Draco. "Let go." He ripped himself free and stepped backwards. "What the hell do you want, Malfoy?"

"I want you to walk with me, not Potter."

Harry raised his eyebrow and adjusted his bag into a more comfortable position. Sirius let out a single bark of laughter and walked off, slipping his arm through Harry's and shooting Draco a smirk. "Sorry, Ferret boy, but I have other things to be doing." He looked away before a look of fury crossed Draco's face but Harry didn't miss it, he felt a twist of worry in his gut but it was quickly pushed aside when Sirius began whispering in his ear.

At Dinner Harry sat in such a way that he had a good view of the Slytherin table, Sirius saw him and waved exuberantly, gaining himself some perfectly horrified looks from Draco's friends. Draco himself was staring at his food with a frown as he ate quickly. Suddenly Sirius stood up, all eyes were drawn to him as he vaulted the table smoothly and wandered over to sit at Harry's side. "Why hullo Potter, how are you this fine evening?" He smirked as the Gryffindor's began grinning and glancing back at the Slytherin table full of rather horrified faces.

"They'll kill you!" Ron exclaimed with wide eyes, he waved his fork in the general direction of the Slytherin table.

Sirius shrugged carelessly. "I'm already a blood-traitor, what more can they do?" He picked up a spoon and helped himself to some of Harry's treacle tart much to his irritation, he lifted his own spoon and hit Sirius on the back of the hand. "Ow!" he pouted and rubbed his bruised knuckles.

"No one touches my Treacle tart." Harry said sternly but his smile took away the menace in his voice.

Hermione giggled and shook her head. "You two are so obvious!" She exclaimed.

"Obviously what?" Ron asked with a frown, Hermione rolled her eyes and sighed.

Harry and Sirius shared a knowing smile.

The next week passed in some kind of blissful dream for Harry, he was swept away by Sirius' intensity, he took insane risks to snatch a few brief seconds with Harry and he would do anything to spend time alone with him, even if it meant kidnapping him by dragging him into empty classrooms between lessons or stealing him at lunch time and taking him into the nearest bathroom where they would scramble frantically with each other's clothes, their groans swallowed by their mouths as they sought each other's skin. Sirius seemed prepared to break every rule in Hogwarts if it meant spending even five short minutes with his lips glued to Harry's, he was full of reckless energy and his eyes glittered dangerously with the knowledge of the possibility of getting caught with his hands down Harry's trousers, he actually seemed to get off on doing it in strange and borderline public areas, but Harry couldn't find it in himself to complain.

It was addictive, he was in a seemingly constant state of giddy joy and he couldn't get enough of it. Hermione kept warning him to be more careful, but Harry shrugged it off, telling her it was fine, they weren't going to get caught and it was just a bit of fun...but even he couldn't ignore that insane gleam in Sirius' eyes as he sought to improve the thrill by getting more and more irresponsible.

One evening after a particularly intense encounter in the Arithmancy classroom, Sirius was sitting on the teacher's desk, his shirt open half way down his chest along with his tie, it was un-tucked at the back and side. His trousers were open and his hair an elegant mess, in his right hand he had a cigarette as he reclined casually and basked in the afterglow of hasty sex. Harry was stood by the window, his own shirt completely undone and his tie in his hands he gazed down at the grounds and watched people milling about as they took full advantage of the last few hours before curfew.

"So, it's my birthday soon." Sirius muttered, pushing hair out of his eyes as he watched Harry.

"It is isn't it..." Harry turned and smiled. "Then you'll be free..."

Sirius shook his head. "My cousin won't let me go that easily, Harry."

Harry sighed heavily, he remembered something Hermione had said to him and he turned with a frown. "Sirius, Hermione told me to look at a book..."

"Is that surprising?" Sirius said blowing smoke through his nostrils and giving himself the look of a very debauched dragon. "What kind of book?"

"Nature's Nobility; a Wizarding Genealogy..." He was watching Sirius carefully as he sat up slowly and stubbed his cigarette out on the desk.

"Why? What's that old book got to interest a Muggleborn?" He frowned.

"I don't know, I hoped you could tell me."

Sirius kicked his legs back and forth and then slowly his eyes widened. "You don't know do you?" He exclaimed gazing at Harry with wide eyes.

"Know what?"

"James Potter, your father, was my first cousin once removed..."

Harry fell on his arse. His mouth hung open like a fish as he looked up at Sirius who seemed surprised by his reaction, he stood and helped Harry to his feet before guiding him to a chair. "Y-You...a-and me...are...?"

"Related, yes. Of course we are..." Sirius was smiling. "Most of the pureblood families are interrelated, otherwise there would be no purebloods. You're related to Draco Malfoy too you know, and the Weasley's. I can't believe you didn't know!"

"You did tell me that purebloods were related but I never thought about it before...not that we were..." he paused and shivered. "B-But that means...that means what we're doing..." Sirius said nothing but his face became serious as he folded his arms across his chest, he watched Harry come to terms with what they had been doing. Finally he sucked in a breath through his teeth. "But its...its not so bad, is it? I mean, neither of us are capable of having kids so its...not weird or anything right?"

Sirius shrugged. "Harry, you're talking to the guy whose own parents were second cousins. To me the only thing wrong is fucking a sibling."

"R-Right...yeah...sorry..." Harry hung his head. "I can't believe I ignored that." He sighed. "Why did Hermione point it out? I was quite happy not knowing..."

Sirius let Harry absorb the shock of discovering that they were actually blood related, he hoped it didn't ruin anything, he had always known that Muggles had different rules and laws concerning interbreeding but Wizards had no such laws so there tended to be a bit more insanity in the old families. He sighed and looked out the window, he could only wait and hope it didn't make Harry think twice about what they were doing.

END NOTE: Lastly: Yes, Harry Potter is most certainly related to Sirius Black. Even if James' parents weren't the Dorea and Charlus Potter on the Black family tree, all pureblood wizards are interrelated so by default they're related anyways through James. :D So, there we go.