Remus knew it would be a shock to Sirius and likely even painful. Sirius had considered James his brother and told him everything. He had loved Harry as the son of James and his little mini marauder. He hoped for Harry's sake that wouldn't change. Remus and Lily had always been close so nothing changed. But Sirius had loved Regulus too and felt guilty that he thought his brother had died as a spy. Harry was still his nephew and godson, just in blood. Well he was James' son in blood, he had been adopted by James. James had loved that little boy as if he had been his own. If there was any doubt before, the way he died for Harry, proved it. He had tried to hold off Voldemort so his wife and Harry could escape.

Sirius looked at Remus and back at his grandfather, then down at the book at his hand. None of this could be happening he told himself. Harry was a Potter, he didn't know how this was happening. He loved that little boy and he knew James had as well.

Sirius shook his head. "No."

Remus nodded. "It' true."

"It can't be. He looks like James."

Remus sighed. "James blood adopted him."

"Why? I don't get any of this."

Remus gently explained. "James knew from the start."

Sirius was shaken. "They would have told me."

"It was too dangerous."

"I had a nephew….how could they….."

"That is why you were named godfather."

Pollux watched. "It seems I have a great grandson."

Sirius smirked at the old man. "Excited are you?"

Pollux grunted. "May be less of a disappointment."

Sirius ground his teeth. "Where are you going?"

Pollux turned back. "Don't talk to me like that boy?"

"I still need to find my brother."

The man grunted. "A reunion seems in order."

Pollux would continue to look for the boy. He did not share the same sentiment that Arcturus seemed to. He had not had anything to do with the boys. In their world daughters married into their husband's family, that was traditional. His daughter had married the main branch of their family though. He was not pleased his eldest son only had daughters, and his other never wed. His only grandsons were these of the female line.

Sirius looked at Remus and was still filled with such mixed emotions in all of this. He could not believe that James would have lied to him about this. He couldn't believe that Remus had not told him either. He had forgiven him about not telling about his brother but this was deeper.

Sirius turned to him. "I still don't know if I…."

Remus sighed. "You know I am not lying."

"Like you weren't lying before?"

Remus heard the pain. "I was sworn…."

"How could you and James not tell me?"

"We had to keep Harry safe. He is your…."

Sirius cut him off. "He is not a Potter."

"But he is. James worshiped that little boy."

Sirius shook his head. "No….he isn't…."

"Have you ever seen James as happy as when he held Harry in his arms?"

Sirius sighed. "In quidditch…."

"You fool. You said it yourself, he looked even happier the day Harry was born, then on his wedding."

Sirius couldn't deny it. "He was born to be a daddy. But…."

"And he died a daddy. He gave his blood and later his last breath, to protect him."

Sirius reminded him. "Why? He wasn't his."

Remus shook his head. "James did it for you, letting Lily do it, and then the baby. But then for Harry, and himself."

"For me?"

"For your brother and your nephew." Remus reminded him.

"My nephew."

He had never been as close to his brother as James. He had fled the home when he was fifteen and he had left his brother behind. He had tried to come back for his brother but his mother would not let him in. He had always felt such guilt that he had left his brother. He had felt so much anger when he found out Remus and Lily had known his brother was a spy. Now he realized James had known and he had even known more.

Sirius went to leave. "I need to think."

"James would be happy."

Sirius turned. "Happy?"

"That Harry had his Uncle, and his daddy."

"He doesn't have his dad. James is dead."

Remus shook his head. "James was Papa."

Sirius smirked. "He never used such a term."

"He told Regulus he would always be Harry's dad."

Sirius was so confused. "I love Harry but he…."

"What matter is it? He is still your godson, and this just makes him doubly your nephew."

Sirius sighed. "I am being stupid aren't I?"

"No, you have been lied to and are hurt. But remember how much you love him."

"I do."

"And how much you loved James, and do love your brother."

Before Sirius could answer Harry ran in. "Uncle Siri, Uncle Siri."

Narcissa saw the looks. "Maybe we should wait."

Harry pouted. "I wanted to show him my kitty."

Sirius knelt. "I would like to see him."

Remus shared a relieved look with Severus as Sirius spoke with Harry. He knew it was not over and that it would take time for Sirius to deal with this. He was often a child even as an adult but he had changed a lot since the war. He loved his brother even if not the same way as James. He knew Sirius would love if his brother returned home to them. And with time, he would come to accept Harry belonged to both James and Reg.

Harry smiled when he was asked his kitty's name. "Bear, like Uncle Arcturus."

Sirius had brought Harry back to the house but for now he said nothing. He knew his mother deserved to know as did his grandfather. He had a feeling the old man knew or had some clue. He wondered if Pollux had spoken to him. He had never got the sense the two men were close. But for now he was dealing with his own mixed emotions. He was reminded though that Harry was still the same little cub he had always loved. And that James had loved him and died for him. He was also reminded he loved his brother and it was his brother who fathered him.

Harry was oblivious to any change in his Uncle. He was happy, he had got to ride a pony and then bring Bear home with him. He thought to name kitty Arcturus but changed his mind. He wasn't sure his Uncle would like to have a cat named after him. He chose bear instead.

"My nephew." Sirius whispered as he watched Harry sleep later.

"What are you doing?"

Sirius turned to his mother. "He is asleep."

"Have you found him?"

Sirius looked at her. "Him?"

"Don't play dumb with me boy."

Sirius led his mother away. "Not here."

Wallburga turned in the den. "Have you found him?"

Sirius sighed. "No."

"It was foolish to….."

"He is alive. Pollux found his old safe house."

She stopped. "Old?"

"He has been gone for weeks."

"Since we brought Harry." Wallburga realized.

"The cat of course."

"Why is he here but not telling us?"

She could not understand any of this. She may not have been the best mother or so her sons had told her. But she had done her best and Regulus she had always favored. She had been struggling with why her son would have let her believe he was dead all of this time. She had no idea why he had come back for the boy either. She assumed he was trying to make peace with his brother by protecting the child.

Sirius was conflicted about telling the woman the truth. He knew she deserved to know, both about his brother and about her grandson. He could admit, she had perhaps changed a bit. He had seen her show some small reaction to Harry while he was here.

Wallburga saw the look. "You know."

"I don't."

"You are hiding something. Don't try lying to me."

Sirius sighed. "I don't know where he is."

"But you know something."

"I know why he came back."

Wallburga stopped. "For Harry."

Sirius nodded. "Yes."

"I assumed to make peace with you. That isn't news."

Sirius shook his head. "Not for me. For Harry."

"He didn't even know the boy."

"He knew him better than you think."

Wallburga was confused. "Out with it."

"He is your grandson." Sirius managed to say.

"Grandson? What are you on about boy? I know you and James were…."

Sirius cut him off. "Not my son….."

"Regulus'?"

Sirius nodded and as the woman sunk into a chair, he told her the story. He could see the shock written all over her face as he told her. He had no idea how she would react to the news. He had been expecting some kind of reaction but not when she suddenly stood up and went to leave the room. She motioned for him to follow and he hurried after her. He was even more confused when the old woman took him to apparated. He had not done side by side since he was seventeen, and he doubted he had ever done it with her. He had never seen the house they arrived at.

Sirius looked at her. "Where are we?"

She ignored him. "Get out here boy."

Sirius was confused. "Why do you think he is here?"

She ignored him. "You are alive and have a son. You owe me some explanation."

Sirius put a hand on her. "Mum…."

She pulled away. "Come out here boy."

Sirius sighed. "He is not…."

Regulus appeared. "Mum."

She rounded on him. "You will explain yourself boy."

Regulus was pale. "Albus threatened you and Sirius."

"Your family would protect you."

Sirius hugged his brother. "You are alive."

Regulus returned the hug. "I wished to tell you."

Wallburga was straight. "You will return home. You have obligations."

Regulus stopped. "You two, and my….Harry, will be in danger if I do."

Sirius reminded him. "Our grandfathers will help."

"I can't."

"You will. We will find a cover for you, till it is safe. You will return home tonight."

Regulus turned to her. "Mum…"

"You will return. We will find you an identity. Your father….."

Both of her sons knew better than to argue with her. Regulus was reluctant but he came home with the two of them. They were alone. It seems Lucretia had taken Harry to the Burrow again for breakfast. Arcturus arrived and he did not seem too surprised that Regulus was there or about Harry. He looked pleased to know he had a great grandson but not surprised. Sirius had a feeling the old man already knew the truth about it. Wallburga informed Arcturus that they were to find a new identity for her son. He would of course return to the family immediately. Though he was not one to take orders, Arcturus simply inclined his head. He had felt the same way and it was best not to argue with the woman.

She went to leave but paused. "Your father would have…to see both his sons home. I am as well."

An: So Regulus back but new life and his role in Harry's life is yet to be determined.

Severus and Remus will be paired with the Black brothers. Haven't decided who with who yet.