Snape was blasted backwards into the broken four poster, which broke even more when he landed on it. The bang and echoed throughout the room and Lupin and looked very proud. Sirius more that Lupin.

But her friends looked very shocked.

"What the hell..." Ron said faintly.

"Rosie, what made you do that?" Her brother asked incredulously.

"You attacked a teacher!" Hermione exclaimed.

But Rosalyn didn't care. She had turned round, her red hair whipping her face. For a second, Sirius and Lupin admired her as she looked so like a red head that they once knew. Lily Evans. And one of that was standing right next to them. Izzy Potter.

"Tell me about Peter Pettigrew," Rosalyn said quickly, alternating her wand between Black, Lupin and Izzy.

"Oh, he was at school with us we thought he was our friend!" Lupin shouted.

"Yeah, that jumped up little rat always followed us about!" Isabelle agreed.

Rosalyn was about to deny it, but then Harry stepped up beside her and he confronted them. "No, Pettigrew's dead, you killed him!" He jabbed his finger in Sirius' direction.

Lupin stepped infront of Sirius so that Rosalyn couldn't fire at him yet. He spoke with much urgency, trying to get her to listen. "No he didn't, I thought so too until you mentioned seeing Pettigrew on the map."

"The map was lying then-" But Rosalyn stopped. She had remembered Lupin whispering impossible when she had told him about Pettigrew. Had the map been lying? Or had she been mistaken?

Isabelle confirmed her thoughts. "The map never lies! Ever! That coward is alive and he's right there!"

She pointed straight, and unmistakably, at Ron.

"Me?" He asked in confusion and slight hilarity, turning to Rosalyn. "She's mental-"

"Not you!" Sirius turned back, laughing. It was a raspy, hard sound and it wasn't very nice. "Your rat!"

Rosalyn said, not believing it. "No- no it can't be-"

"An animagus!" Sirius echoed her thoughts.

A stunned silence. That's what followed. Then Hermione spoke, looking to Lupin. "But Professor... Pettigrew can't be an animagus... you know that-"

"Why not, Hermione?" Lupin asked, brows furrowed.

"We did animagi in class, you see... and Professor McGonagall told us that the Ministry keep tabs on everyone that can turn into an animal. I looked McGonagall up on it, you see, and Pettigrew wasn't there-"

"See?" Rosalyn, still flaming, burst out. "You see? We may be only thirteen but we're a lot smarter than you dimwits-"

Sirius just laughed. "Inherited a temper, I see. From your mother and Bells combined."

Rosalyn wanted to scream.

"You are right, Hermione," Lupin took advantage of the silence. "But the Ministry never knew that there used to be four unregistered animagi running around Hogwarts."

"If you're going to tell the story, get on with it," Black snapped.

"Yeah, we don't have all day, some of us want to kill a certain traitor," Isabelle agreed.

Lupin sighed, looking down. "This all starts with me becoming a werewolf. If I hadn't been so foolhardy..."

"You couldn't have done anything to stop it, Remy," Isabelle sighed. "Just... come on. You need to tell them before they start killing Siri and I."

"Oh, believe me, I'm coming close to it," Rosalyn muttered to Harry.

Lupin looked back up, straight at Rosalyn. "I received my werewolf bite at a young age. My parents tried everything, but back then, there was no cure. The wolfsbane potion I take now is a recent discovery. It doesn't cure, per say, but it makes me aware of who I am when I transform.

"But before the Wolfsbane potion was discovered, my transformations were the worst, and it seemed hopeless that I would ever get into a school."

Lupin looked even more tired at reliving his worst memories. Rosalyn was kinda glad a bit of light came next. "But then Dumbledore became headmaster, and with his help, he made sure there was no reason I couldn't study at Hogwarts."

He looked at Rosie. "I told you, Rosakyn, that the Whomping Willow, was built the year I came to school. The truth is that it was planted for me. That tree, this house, and everything inside it, was built for my use. So I could have somewhere to transform in peace. Once a month, I was smuggled into this place to become a werewolf. That's the reason they say this place is haunted. But the screams the villagers heard were made by me."

Rosalyn was shocked. She had absolutely no idea what to do. She had never imagined a story this deep.

"But apart from my transformations each month, I was happy," Lupin continued. "Happier than I had even been, for I had friends. Four amazing friends. Sirius Black, Peter Pettigrew, your father, Rosalyn, and Harry, James Potter, and, last but not least, James' sister. Isabelle."

Rosalyn stood, shocked.

"S-sister?" She asked out loud. "We have... I mean... our dad had..."

"A sister," Izzy nodded. "Me."

Rosalyn was still speechless. "You're our... I mean..."

"I'm your aunt," Izzy continued. "But if you're still wanting to kill Siri and I, Remy should probably get on with the story."

Lupin nodded and continued. "But even though I had friends, it didn't mean I told them the truth. I made up plenty of excuses before, just like you Hermione, they worked out the truth. I was terrified they'd desert me, but that's not what happened at all."

Everyone in the room just listened, the quartet all rendered silent. Lupin went on, reliving his past.

"They became animagi. And, each month, when I transformed, they snuck out with me, all under the invisibility cloak. I doubt whether any Hogwarts student ever found out what we did, but... that's how we came to write the Marauder's Map. We each signed it with our nicknames. I'm Moony. Sirius is Padfoot. Izz was Scarlett. Peter's Wormtail. James was Prongs."

"What animal-" Harry started, but Hermione interrupted him.

"That was really dangerous! What if you'd bitten your friends! Or even worse - another student!"

Lupin bit his lip. "The thought still haunts me, but we managed not to. We were young... and thoughtless."

"But- how do you know that's Peter?" Rosalyn asked.

Sirius smirked. "He's missing a toe."

Rosalyn had to ask again. "I'm sorry, but, what the fuck?"

"Don't you remember the story?" Isabelle asked, smirking at Rosalyn. "The biggest part they ever found of Pettigrew was his-"

"Finger," Rosalyn breathed. Now she remembered. "But- how-"

"Fudge came to Azkaban about a week before I escaped, and gave me his newspaper clipping," Sirius explained. "And on the front page, it said that the Weasley's were in Egypt. And on that boy's shoulder," he pointed at Ron. "Was a rat. With one two missing. Rosalyn was beside him. And it was then that I knew... I had to get to Hogwarts..."

"So simple... so brilliant..." Remus continued. "I suppose he cut it off himself?"

Sirius nodded. "I cornered him that night once I realised that he'd betrayed two of my best friends. I tied his hands behind his back but he still reached his wand, and, before I could curse him, he blew apart half the street, cut his finger off, and disappeared down into the sewer with the other rats."

Rosalyn narrowed her eyes. "So how did you escape from Azkaban? Once you saw Scabbers- Peter- whoever-"

"I don't know how I did it," Sirius said harshly. "But when I found out that Peter was out and about, it just made me so angry.

"Now, the only thought I held onto in there was that I was innocent; and it wasn't a happy thought, so the dementors couldn't take it from me.

"But when I escaped... I don't know. As you saw, my animagus is a dog, and one day, I just transformed, and slipped past the dementors. They didn't really understand what was happening, I think... but anyway, as soon as I escaped, I focused on getting to Hogwarts. I met Bells on the way..."

"I'm sure that reunion consisted of a lot," Lupin added.

"Shut up," Izzy chimed in.

Sirius sighed. "Right, if they don't believe us by now, we'll just have to offer them some proof, won't we?"

Ron clutched his rat to his chest tightly as Sirius tried, once more, to convince him he was holding a murderer. "Scabbers has been in my family for-"

"Twelve years," Sirius' shadowed eyes went wide. "Did you ever wonder why he was living so long?"

"So what?" Ron asked, but Rosalyn realised what. Her feeling of hatred for Sirius was being slowly mellowed as the crazy man unraveled his story into her hands.

Rosalyn didn't know what to think. But she wasn't giving in to her story that easily. Even if Lupin's made a lot more sense.

"Show me," she pointed her wand at Black once more.

Black looked at her. Then at Ron. Then at her again. She nodded slightly, and he leant forward, his hand grabbing for Scabbers. Ron pulled back, but Rosalyn said. "Give it to him, Ron!"

"What're you gonna do to him? Scabbers!" Ron yelled in a scared voice. Rosalyn sighed as Black finally wrestled Scabbers out of Ron's clamped grip.

"Leave him alone!" Ron yelled again, but Sirius now had Scabbers in his hand, squeezing his tightly. He held him at arms length, and looked at him harshly, pointing Rosalyn's wand at him.

Lupin also pointed his wand at him, and they got ready to do whatever they were going to do.

Ron was also curious about this, as he shouted. "What're you gonna do to him?" Across the room.

"Make him show himself," Lupin answered kindly. "If he really is a rat, he'll feel no pain."

Ron didn't seem in the least bit consoled at this news, but he quietened down. Rosalyn looked at the two men in front of her, wondering, for the first time, if they really were telling the truth. Or if they wanted her dead.

Sirius set Scabbers (or Peter, whoever) down on the table, and he ran, both Sirius and Lupin tried to curse him as he ran across it and down the piano, playing a few notes as he went. He went down onto the stool and on the wooden floor, and they still failed to catch him. It wasn't until he tried to run through a hole in the wall when they finally got him.

And he did transform. Rosalyn saw it. When Lupin and Sirius pulled him roughly through the hole, she realised that he was a short man. Shorter than her, anyway, and he was bald on the top of his head, with only a bit of hair around his ears and on the back of his head. His robes, too, were ripped and torn, dirty and ragged. He had trousers that didn't reach and a manky green waistcoat on.

His face was unshaven, his eyes were grey and they looked like they hadn't seen the sun in years, even though his rat ones had. Rosalyn looked as he threw his hands up and said. "R-Re- Remus? Sirius? I-Izzy? My old friends..."

He went forward to hug them all, but they threw him back, rejected him. Rosalyn would've felt quite sorry for him if he wasn't the prime suspect for who betrayed her parents.

He had been rejected by his friends, so now he turned to someone else in the room who would help him. His eyes fell on Rosalyn and Harry. He walked towards Rosalyn, in particular, coming up so close to her that she had to back away.

"Ro- Rosalyn, Harry, I sw- swear you look just like your parents, just like Lily and James... I knew them, you see, and-"

"HOW DARE YOU SPEAK TO ROSALYN AND HARRY!" Sirius yelled at Pettigrew, who flinched. "HOW DARE YOU TALK ABOUT LILY AND JAMES IN FRONT OF THEM!"

He, Izzy and Lupin chased Pettigrew round the table, and caught him off guard. He was now trapped, round the back of the wood with Sirius and Remus on either side of him and Isabelle right opposite him, giving him a death stare.

"You sold James and Lily to Voldemort, didn't you?" Asked Lupin, already knowing the answer to his query.

Pettigrew began to cry. It wasn't really crying, more a twisted wail with a screwed up face. Rosalyn rolled her eyes. Pettigrew was guilty, and she was starting to believe it.

"Oh, stop crying you baby!" Izzy made it clear she felt no pity for him. "You're a traitor and you sold my brother and my best friend's lives away!"

"I didn't mean to! The Dark Lord- you have no idea of the weapons that he possesses. S-s-Sirius, I-I-Izzy, what would you've done? What would you've done?" He sobbed once more, but it was still the most disgusting sound ever.

"I WOULD'VE DIED!" Sirius bellowed, angrier than anyone could imagine. "DIED RATHER THAN BETRAY MY FRIENDS!"

"AS, IF VOLDEMORT HAD EVER TOOK AN INTEREST IN YOUR STINKING FLESH, WE WOULD'VE DONE FOR YOU!" Izzy also joined in the yelling.

Pettigrew, however, found a way round Sirius, Izzy and Lupin and ran to the door which Rosalyn blocked.

"You're not going anywhere," she said stoutly.

But, instead of running out the door, he put his arms round her and Rosalyn shrank back at the feel of his sweaty skin on her neck and the side of her face. It was rank.

"Rosalyn, James wouldn't have wanted me killed," Peter started, but Rosalyn threw him off. He staggered to the side of the room and Rosalyn retorted.

"Get off me! Running to me because you think I'll have mercy? Because you think I'll protect you? Sorry, but you're very wrong."

Izzy glowed with pride as well as Sirius and Lupin. Then, the three of them pulled Peter between their wands which they now pointed at him.

"You should've realised Peter," said Sirius savagely. "That if Voldemort didn't kill you we would-" He checked with Lupin and Izzy, who nodded. "-Together!"

Rosalyn looked at them. They were going to kill him. They were going to avenge her parents, but they were also going to become murderers in the process. Lupin was going to cut a rift in his nice soul, on that Rosalyn had liked, and Sirius was going to become the person everyone thought he was. She didn't want this to happen, so she took her chance to shout something she would regret to her dying day.

"No!"

Izzy looked down at the ground.

"Rosalyn, this man, this, bit of stinking vermin, is the reason that you have no parents, and he would've seen you die as well, you and Harry-"

"I know what he is," Rosalyn said harshly, but still showing a bit of compassion. "But we'll take him up to the castle."

Peter fell to his knees, sobbing. "Bless you, girl, bless you..." But Rosalyn didn't care. He tried to grovel at her feet, but as soon as he touched her robes she jumped back.

"Get off me!" Rosalyn said, suddenly feeling the same way about Pettigrew as she had felt about Sirius Black when she had heard about him in the Three Broomsticks. She felt angry. She knew she had sworn to kill Black, but for some reason, she didn't like the idea of Pettigrew being murdered by her teacher and supposed godfather.

"I said we'd take you up to the castle," Rosalyn repeated, feeling and sounding harsh. "You'll be questioned and Sirius'll be let off, and after that the dementors can have you, if they can find a soul in you to suck out."

Pettigrew had a sick smile on his face, and he started to shake. He brought his hands, his fingernails were shaped likes rat's claws, she saw, up to his face. His eyes widened, his body began to shake with a tremendous amount of pressure. Rosalyn felt a sort of vindictive pleasure at knowing that the man who was responsible for her parents' death was facing his comeuppance.

Rosalyn sighed and said. "Well, as I've promised this piece of vermin a nasty end, we may as well leave now before the dementors can sense Sirius is here and try to kiss an innocent man."

"You- you really believe it then?" Sirius said in a hoarse and croaky voice. "That I'm innocent?"

Rosalyn swallowed the lump in her throat. She nodded and Harry, Ron and Hermione did too. Even though they had kind of known it before she had said it, Rosalyn's clarification made everything a lot better, and the two sides in the room a lot clearer.

They headed out the door and back out the supposedly haunted house. As they walked back down the tunnel they all got into a sort of formation. Lupin held Pettigrew right to him so he had no chance of escape, Sirius and Harry supported Ron with his bitten leg and Rosalyn, Izzy and Hermione led the way back out the tunnel. Whilst they walked, Sirius talked to Ron.

"Sorry about the bite. I reckon that twinges a bit?"

"A bit?" Ron exclaimed incredulously. "A bit!? You almost tore my leg off!"

"Well I was going for the rat," Sirius gave himself a minor defence. "Normally, I have a very sweet deposition as a dog, in fact more than once, James suggested that I make the change permanent."

"Yeah, he wanted me to do that as well," Izzy rolled her eyes. "I told him I wasn't going to be a fox for life even if Siri changed with me."

Rosalyn laughed.

They got Ron out of the tunnel and layed him down outside it. The sun had gone down fully now, and Hogwarts was all lit up across the lake, looking beautiful. Sirius and Izzy both wandered over to the edge of the hill as Harry, Hermione and Rosalyn went to nursing Ron's leg.

"You've got to go," Harry said quietly, eyeing Sirius nostalgically looking at the castle.

"No, don't worry it's fine I'll stay," Rosalyn said quickly but reluctantly.

Hermione looked her meaningfully in the eye. "You go, we'll stay."

"Okay," Rosalyn said, rising out of her kneeling position.

She walked towards her godfather and her aunt, not knowing for a second how this encounter was going to go.