A/N: Have mercy on us and understand we are non-natives so our English may suck or our writing can sound pretty clumsy but we would appreciate if you gave us a chance. This might turn up to be a little perverted story where people are not necessarily nice...Oh no, I forgot to mention about the OotP spoilers and that I change OotP so that Harry is already in his seventh year when these events take place.

Title: The Blood of the Blacks
Authors: LazyElf and Lizlego
Genre: Angst/Romance/Action/Adventure
Paring: Severus/Harry, Severus/Sirius, probably also Sirius/Harry
Rating: R
Disclaimer: J.K. Rowling owns Harry Potter and its characters. I won't use them in bad purposes or to make harm to anyone.
WARNINGS: AU, SLASH, man with man sex, probably OOC characters (mostly Harry)
Summary: Sirius returns to his home after so many years. He is safe there but are there other dangers in living there?? What secrets are hidden and revealed? What does Sirius say or do when he learns that Harry has an affair with his teacher, with none other than Severus Snape who Sirius dislikes so much?

1. Prologue

In Grimmauld number 12 there stood a cold looking ancient house. It was the house of the Blacks and it had existed for centuries but only few knew where to find it as it was a house of dark secrets and thus well guarded with protective spells. It was a dark and depressing place full of old and rotten furnitures. Threatening smells of something bad and painful still lingered in its rooms though no one had lived there in a long time.

Until now that its rightful owner had returned. "Rightful owner indeed.", Sirius Black thought bitterly and wandered slowly through his old and now new home. He hoped he had never come back here. He shuddered to think he would have to stay here for who knew how long. "You'll be safe there." Dumbledore had assured him and he was right, at least on a certain degree. Physically he would be safe but mentally… He just wasn't sure. Here, in his own home he had suffered almost as much mental pain as in Azkaban.

He touched almost fearfully the objects he passed in the rooms - tables, chairs, mirrors. All in the house looked the same as the day he had left, for good as he had thought back then. He had had the guts to run away, to turn his back on his parents who wanted him to be something he wasn't. He hadn't been welcome in here after that day and a part of him waited an attack. Any kind of attack. A little payback of the rest of the Blacks to their heir who was not worthy of his name and certainly was not worthy of this house. He was sure this place was full of little traps meant for him. Not those kinds of traps that would kill him but the type that would cause him a little bit of pain, inconvenience and would give the people in the family portraits on the walls something to laugh about. But no, there was no trace of anything like that. And suddenly the realization hit him hard on his face. His parents had not thought he would live long enough to actually inherit the house! That's why Dumbledore was sure it was safe place for him. Funny and ironic how the house would now serve the people the ancient Blacks had always despised and even hated.

Sirius laughed at that thought. He felt hostility everywhere around him. This house hated his presence as much as he himself hated being in there. He heard ill-tempered whispers echoing on the walls as he walked along a corridor: "Traitor! Traitor!" They called him and what they said was true but he was not sorry for his choice of friends. No, he was rather proud of it and proud of what he himself had become regardless of his inheritance, his own blood line he so much hated.

"You are making friends with wrong kinds of people!" His mother had once shouted him and her eyes had thrown daggers at him. Yes, wrong kinds of friends from wrong kinds of families. His mother never had forgotten to lecture him about it. First she had been utterly disappointed her son hadn't become a member of the respectful Slytherin house but one of the bloody Gryffindors! But that wasn't enough. No, in addition to that he had become good friends with some mudbloods which was even worse.

He looked at the portraits on the wall of a large dining room. All of them presented witches or wizards who had been great in Dark Arts. They had an angry piercing gaze as they looked down to Sirius and they pointed him with their accusing fingers. Annoyed he grinned at them, showing them clearly his contempt. All of his youth he had been afraid of becoming like them. He had spent many of his nights in this house awake, thinking that in his sleep something could conquer his mind and turn him into evil. He hadn't wanted to let his parents down but he had had no choice. They had done their best to make him feel like a bad boy. Especially his mother had done a great job.

"You cannot be my son, Sirius! My loins would never produce something like you! You're disgrace to our family! " She had screamed at him many times and it had hurt. It had again and again sliced him into pieces and he had passionately hated her. But like any child he had nevertheless wanted her love and acceptance and that need had never entirely disappeared. She had been a monster but still she had been his mother. He had tried to forget all about her. He had tried to leave her in the past, forever, and not to care but he had failed.

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aproximately at the same at Hogwarts....

Severus Snape sat at the table in his office and stared, almost glared at nothingness. He had never thought it possible one day a student might fall in love with him or even have a crush on him. He had always made sure nobody got too close to him. He had been distant to everyone – including the students of his own House, the Slytherins. He had treated them all with certain coldness that couldn't attract anyone. And yet…now he was in this situation. He had an admirer who couldn't keep his eyes out of him when attending his class. That was simply nuts! It made no sense and definitely made him mad! It was none other than the Great Harry Potter himself who fancied him and kept staring at him with those disturbingly green eyes.

He had done his best to discourage the boy. Last few months he had mistreated him worse than ever before but that had gained him nothing. No, the outcome only was that the boy seemed more firm in his admiration. Snape had almost started to believe Harry would soon ask him for a date or something, and that would be it. The boy just refused to understand him! The boy refused to understand that hate is hate and nothing else! And that hate was what Severus Snape felt for James Potter's son.

He had come to a conclusion that Harry could learn only the hard way. Instead of discouraging him Snape would now encourage him and show him exactly how much he cared about him. That should do the trick! Obviously the boy had some romantic ideas about giving his teacher some love he so badly needed and turn him into a nice man. It was time for Snape to blow that idiotic dream and introduce Harry to reality. He was not a nice loving man nor would he ever become one!

Knock on the door, somewhat hesitant but still loud enough to be easily heard made Snape jump on his feet. He felt nervousness arising, his heart was bouncing back and forth in his chest but as he spoke there was no trace of it

"Enter." He said with an impatient tone of voice. Of course he had been in physical contact before but it had its risks if he did it with one of his students. If Dumbledore would found what he was up to he would be in very deep ship indeed. Potter stepped slowly in to the dimly lit room and stopped standing at the opposite side of his desk. Through Snape's observing eyes he looked slightly flushed and nervous but nevertheless proud, arrogant. He also looked undoubtedly admiring and held his head high as he stated the obvious

"I came for that detention…sir." He said pushing his glasses to sit better on the bridge of his nose. Snape sneered. He had given that detention for…what? He couldn't even remember the reason! He had only wanted to bring the boy to his office and punish him for lusting over his teacher, lusting over him!

"Indeed, Mr. Potter, and you're not at all displeased to be in here, are you?" He snarled glaring the boy who blinked his eyes and blushed. Sweet, very sweet. Snape's anger was turning into pure rage.

"Sir…?" Potter asked quietly.

"I'm not blind! I have seen how you are looking at me!" Snape snapped at him, walked around the table and placed a hand on his shoulder gazing at him fixedly. "You fancy me or can you deny that, Potter?" He then silkily asked. The boy seemed to blush even more but didn't lower his eyes. Snape felt his body shivering under his touch and he heard his breathing becoming more laboured. As Snape had already guessed the boy didn't say anything to deny his claim. "We need to do something about that. I need to do something about that. Agree, Mr. Potter?" He massaged the boys back with his long thin fingers while speaking out his words and his student's trembling came even more apparent to him.

"I…I…don't…know….sir." Potter stuttered leaning cautiously to his teacher's caressing touch. His eyes were dreamily shining and he licked his lips like he was wishing to be kissed on them. Snape had no intention to fulfil his wish. He pulled the boys body close to him and continued to caress his body with his hands. He leaned forward, closer to Potter's left ear and licked it. He could smell the odor of innocence.

"But you do fancy me? You have a crush on me? You're in love with me?" He whispered harshly and pressed his own body more tightly onto boy's body. He waited the words of permission, words of permission to destroy Potter's little daydreams with worst possible way.

"I…I…yeah." Potter muttered silently and Snape grinned half madly half in dark satisfaction. He truly hated Harry Potter.