Sirus's portrait was staring at Harry, trying to find the right words. He was surprised that Harry had no idea who Charlie and Rosie were. Sirius was going over all of his past conversations with Harry, wondering why he had never mentioned them before.

"Sirius, what's going on?" Harry asked, confused. This was the first time he had seen his godfather so agitated. He wondered who these mysterious kids were. When Sirius remained silent, Harry realized that they must be important to Sirius.

Harry assumed that Sirius had children who had passed away during the first war, and it was too painful for him to talk about them.

After a moment of silence, Sirius took a deep breath and spoke again.

"Harry, tell me everything you know about your closest family," Sirius requested, wanting to know how much Harry knew.

"Well, my grandparents on the Potter side were Charlus and Dorea Potter, who died in the early 80s from dragon pox. My dad was an only child because they had fertility issues, which probably came from the Blacks' inbreeding in the past. I don't know much about the Evanses because Petunia never spoke about them. I only know that they died in a car crash in the late 70s. But why are you asking?" Harry explained, feeling uneasy.

"Is that all you know?" Sirius asked, furious that Dumbledore had kept such a secret from Harry. He was also angry at himself for not talking more with his godson about his family.

"Yes, that's pretty much it. Of course, I know a lot about my parents, and unfortunately, about the Dursleys, but that's all," Harry replied patiently, even though he was nervous and wanted answers.

Sirius sighed deeply, preparing himself for what was about to happen. He knew that Harry would be furious, and he couldn't blame him.

"I'm sorry, Harry, for not speaking more about your family. It's another area where I failed miserably as your godfather."

"Don't worry, Padfoot. I know that, if you were free, you would have been a wonderful guardian to me, and I don't blame you for my lack of knowledge."

"Merlin, I hope you'll still think that in a moment," Sirius said, bracing himself for what was to come. "First of all, you need to know that your mother had two sisters, not one."

"What?!"

"Violet was the youngest of the Evans sisters. She was a year younger than your mom, and they were very close."

"What happened to her? Was she a witch? If not, why didn't Petunia ever mention her?" Harry began asking questions rapidly, wanting to know more about his aunt whom he had never heard of before.

"She was a Muggle, and the last I heard, she left England in 1981 because Lily was worried she might be targeted by Death Eaters. And from what I know, Petunia hated her as much as she hated Lily because Violet accepted that Lily was a witch, and they were close."

"That makes sense. Petunia could never accept anyone who accepted magic as their family member, so she would never mention her. But why are you telling me this now?"

"I'll explain in a moment, but there's something bigger you need to know."

"What."

"Harry, Charlie's, and Rosie's full names are Charlus Andrew Potter and Rose Lily Potter. They are your younger siblings," Sirius finally dropped the bombshell on Harry. He watched as Harry's expression changed from curious but uneasy to pure fury.

"Repeat that," Harry demanded.

"Charlie and Rosie are the names of your younger twin siblings," Sirius repeated.

"So you want me to believe that every adult in my life decided that the fact that I am the older brother is unimportant and that I didn't need to know?" Harry asked anything but calmly. He was fighting hard to control the urge to destroy the office and go to Hogwarts to do the same with Dumbledore's portrait.

"It's not that simple, Harry. Your parents were in hiding since before you were born, and they spent the last year of their lives under the Fidelius Charm. They knew they were too big of targets to risk leaving the cottage in Godric's Hollow, and during that time, they had only seen people who knew the secret - me, Dumbledore, Poppy, and Wormtail. Only those people were aware that your mom was pregnant," Sirius explained.

"Remus didn't know?"

"No, he didn't. In October 1980, he went on a mission to infiltrate werewolves, and we kept in small contact only via owls. Your parents decided that it was too risky to write about it in a letter, as they could be intercepted."

"But if you knew, why didn't you mention anything to me?" Harry shouted, his rage rising with every passing second.

"Honestly, I was sure that you knew about them. And as they were only a few weeks old, I couldn't tell you much about them."

"But why didn't Dumbledore and Pomfrey ever tell me? They both knew how much I craved to have a family! They are somewhere in the world either not knowing their origins or thinking that I am some kind of arrogant jerk who can't even be bothered to meet his brother and sister!"

"Wait, you think they're alive?" Sirius asked, surprised.

"Why wouldn't they be?" asked Harry, taken aback by Sirius' question.

"Well, I was sure that they died together with your parents."

"No way. Thanks to Voldie and this damned scar, I remember everything from that night, and there was no one else besides me, my mom, and dad in the cottage when he arrived there. Besides, I have been to see their tombstone, and there is no mention of them. And I don't suspect that they would be buried somewhere else."

"Fucking hell, we need to find out what happened to them."

"No shit, Sherlock," Harry replied. He was already thinking about how to find them and who could help him in the search. "Would the inheritance test show my siblings?" Harry asked after a moment.

"Nope, it would not as it only checks your ancestors."

"Are you sure that only you knew that mom was pregnant?"

"Well, maybe your Aunt Violet knew, but from what I know, she was already abroad by then."

"Then where were they during that Halloween?"

"I can't give you an answer to that question."

"When exactly were they born?"

"03 September 1981. I remember your mom was happy that they were born in September, as it meant they would go to Hogwarts a year later," Sirius explained sadly. He felt immense guilt about this situation. Not only had he failed his godson, but his honorary nephew and niece.

"So it would explain why Mom and Dad's portraits never asked about them, as they had updated memories inside of them before she was pregnant."

"You're probably right. What are you going to do now?"

"I will go to Poppy first thing in the morning. I need to find out what stopped her from telling me about them."

"You think that she was forbidden to do that?"

"I am almost sure," Harry replied confidently. Many adults had wronged him in the past, but Poppy Pomfrey was one of the few who was always honest with him, and he trusted her with his life. "Even if she won't know what happened to them, she may explain more about what happened in 1981."

"Sounds reasonable, though I was sure you would rush to Hogwarts immediately."

"If I can't give the benefit of the doubt to Poppy Pomfrey, then I can't give that to anyone ever," Harry replied and started to think more about the situation.

"One thing is bothering me so much. You had told me that Wormtail knew that there were more Potter kids than just me. Yet, Tom had never mentioned them to me. He loved to brag about how he killed my parents and how he would destroy me as well. Had he known about their existence, he would have threatened that he would hurt them more than once. Yet he said nothing, so it means that Pettigrew kept his mouth shut. But why did he do that?" Harry asked, looking at his godfather's portrait.

"I understand that it seems weird. But to be honest, this whole situation is quite surreal. I think it would be best if you just went to bed. Overthinking won't help you," said the voice of reason.

"Alright, I'm going back to Potter Manor then," Harry declared before leaving Grimmauld Place. Since it was late, he didn't encounter any other residents of his home, so he asked Mimsy to bring him supper in his bedroom.

Harry couldn't sleep that night as he spent the entire time thinking about his siblings and what could have happened to them. He was worried about their well-being and if they were being mistreated. He wondered why almost no one knew about them, and he was sure that Dumbledore was behind it all. However, he couldn't understand the old man's motives.

He considered taking a Sleeping Draught, but he was afraid he would sleep for too long. He wanted to visit Pomfrey early as he still had a lot of work to do, regardless of his zeal to find the twins. But in the end, he decided to stay up for the rest of the night and catch up on paperwork. Around seven in the morning, he wrote a note for his team and left for Hogwarts. He was so lost in thought during his walk that he didn't realize he was in the Hospital Wing already.

"Mr. Potter, what have you done to yourself again?" asked Pomfrey exasperatedly, taking her wand to start casting diagnostic spells.

"Madam Pomfrey, I'm fine. I came here to talk to you. Can we go somewhere where we won't be overheard?" Harry asked.

Matron nodded her head and led him to her office. She sat down at her desk and motioned for him to do the same, waiting for him to explain the reason for his visit.

"Madam, I'll ask bluntly. Why have you never told me about my siblings?" Harry asked straightforwardly as he was too nervous to delay the question.

Poppy Pomfrey looked at him and burst into tears. She was sitting on her chair, sobbing uncontrollably, relieved that Harry had asked her that question. It took her a moment to gather herself, but finally, she started to explain everything to Harry.

"Harry, I'm so sorry that I never told you anything, but Dumbledore forced me to make an Unbreakable Vow. I wasn't supposed to tell or even hint at your siblings' existence. I promised to tell you everything the moment you came to me to ask this question," she explained, with tears still streaming down her face.

"He did what? Why did he force you to make that Vow?" Harry asked, incredulous.

"I have no idea why he did that, and I never dared to find out."

"Alright, let's put this aside for now. Do you know what happened to them?"

"First of all, are you aware that your mother had two sisters?" Poppy started her explanation.

"Yes, Sirius told me that."

"You see, in early October 1981, she visited your home with her two little kids. During their visit, they infected your siblings with chickenpox, and the twins became seriously ill. Unfortunately, there was nothing that magic could do to help them, so your mother decided to visit a Muggle doctor who sent the twins to the hospital, where they were on that fateful Halloween. After the attack, Dumbledore refused to reunite you with them and placed them somewhere, unfortunately, I don't know where."

"And his portrait will never tell me that, or he will demand my full obedience to the Ministry," Harry replied, furious.

"Do you think there is another way to find out?" asked the woman.

Harry paused for a moment, considering his response. He had been relying on the portrait as his last hope, but then a new idea occurred to him.

"Aberforth. After his death, he inherited his brother's personal belongings. Maybe there's something among them that could provide some answers," Harry exclaimed.

"Then go," the woman urged him, hoping he would find his family. She had been living with guilt for years, knowing how much Harry longed for his own family, and hiding the truth from him was tearing her apart.

Harry ran towards Hogsmeade and soon he was pounding on the doors to the Hog's Head Inn.

"Don't you know what time it is?" Aberforth barked at Harry.

"We need to talk now," Harry replied firmly. Aberforth quickly realized that it was an urgent and important conversation, so he allowed Harry to enter.

"Did you keep any of your brother's personal belongings?" Harry asked Aberforth.

"Why do you need them? Are you planning to resurrect him?" Aberforth replied sarcastically.

"I would only do that to get rid of him again, but this time it wouldn't be quick or painless."

"What has my dear brother done again?" asked Abe, his anger evident. He despised his brother and was certain that Harry had wronged him terribly.

"He kept the existence of my siblings hidden from me. In 1981, he forced Madam Pomfrey to give him an Unbreakable Vow and sent the twins away from me."

"Mom forgive me, but I hope that this son of a whore is frying himself in hell."

"I hope so as well. Did you keep something?" Harry asked.

"I did. Come with me," Abe replied and led Harry to a small cupboard at the back of his inn.

"Here is everything I got from him. I think I saw some kind of diary somewhere, so I suggest you start with that. If you have any questions, let me know," Abe explained and left Harry to search through the cupboard.

It didn't take long for Harry to find the journal mentioned by Abe. He conjured himself a chair and began reading.