This is a rewrite of my story the heir of the black family.

Sirius moved his finger along the coarse fabric of the Black family tapestry as he was telling his godson Harry about his family. Sirius had not been in this room for years. He hated it. Sirius was trapped in his own personal hell. He did not really think that he deserved this fate, but then again part of him thought he did. He was the one who decided to switch who was James and Lily's secret keeper. Even though he did not directly betray them he still felt like he did, at least indirectly. Sirius felt like it was his fault that they were dead and maybe it was, maybe Harry and Remus should hate him or maybe that was just his self destructive nature talking.

Sirius shook his head, he hated the way this house was making him think. Being back here made him feel like he was sixteen again and he absolutely hated that feeling. Hell at least when he was sixteen he was able to leave, he was also able to talk to James. But he was not able to do any of those things right now. Sirius blinked rapidly trying to keep the tears from falling.

Harry listened and watched as Sirius explained his family tree in a pissed off tone. He was fascinated. It did not really make since to him how someone like Sirius could possibly come from a messed up family like this.

"And that girl down there that was my sister Regulus." Sirius told him while vaguely jestering somewhere at the bottom of the tree.

This information surprised Harry, he didn't know that Sirius had a sibling in fact it was pretty hard to picture him with a sibling.

"I didn't know you had a sister." Harry asked his godfather.

"Yeah, and she was a much better child as I was constantly reminded." Sirius replied although he was already distracted looking at the top right half the tree.

Harry bent down to look at Regulus's branch and saw something that surprised him even more.

"You have a nephew?" He asked Sirius slightly offended that that fact was never mentioned.

"What no I don't." Sirius said as he moved his head down to look at what Harry was seeing.

Sirius stared shocked at the bottom of the tapestry, slowly taking the information in. This did not make any since, none at all. Not one bit of it made since, Sirius would have known if Regulus got pregnant even though he was not talking to his family at that time the Black family was still very well known and there definitely would have been gossip about the heir being pregnant, he also secretly would like to think that Regulus would have told him.

Regulus's child name was also something that did not make any sense. The big one being the fact that he had the last name Hargreeves. Hargreeves was not a pureblood family last name, Sirius would know he was forced to memorise all of them when he was a young child, and he knew that if Regulus had gotten pregnant by anyone other than a pureblood she would have one hundred percent been disowned and Sirius would definitely have heard about it.

Her child's first name was also incredibly odd. One of the Black family's least horrible traditions was the fact that they named all of their children after the stars. And Klaus was not a star name. Regulus was such a soft person she definitely would have continued this tradition at least he thought she would have. The last strange part and this was definitely the strangest was that there was no father listed which meant that there was no father even thought it was completely impossible.

Harry shook him out of his thoughts by saying "You know the name Klaus Hargreeves sounds pretty familiar, I just can not put my finger on why. I will ask Hermione she will probably know."

Sirius just nodded along still shocked about the new information that he learned about his younger sister.