Peter started pacing around the dorm room. He glanced anxiously at the clock. The others wouldn't be back for another two hours at the least. Thank Merlin today is a double period of McGonagall. That meant he had the next two hours to officially figure out what he was going to do.

He knew from the memories that Sirius had it in him to trick Snape into going to the Shack on a full moon. The next full moon was in two weeks, it would be tight but Peter thought he could manage getting Sirius well and truly pissed at Snape. If I do this, Snape is going to die. Is it worth it? Peter searched inside himself and found that the answer was yes. Being a Gryffindor is about doing the right thing always, even if it's hard. This is the only way I can live, so it can't possibly be the wrong thing.

Here we go Wormy.

He started at lunch the very same day, he had no time to spare.

"Padfoot, don't look now, but Snivvy is talking to Regulus again."

"What?!" Sirius shouted, immediately whipping his head around to glare at Snape.

Peter had to stifle his smile, it was too easy to get Sirius mad at the Slytherin. The two of them had had a particularly bad fight last week, with Padfoot and Snape beating each other to a pulp. "If you ever even look at Regulus again," Sirius had gasped out, "I'll gouge your fucking eyes out and feed them to your deadbeat father." It had been an unoriginal threat but the raw hatred in Sirius's voice had made Peter want to shit himself.

Luckily for his plans, however, Peter had been the only other person there, so James wouldn't know how to effectively calm him down.

"He's dead," muttered Sirius. He was clenching his cup so hard that it shattered in his hands. He made to stand up but Remus dragged him down by his collar.

"Don't be an idiot, I don't know what this is about but now is not the time."

Peter felt his own hatred build up in him as he watched Sirius and Remus talk to each other. If he even thought too hard about them murdering him one day, he felt his fingers begin to twitch in fear and fury.

James joined Remus in an effort to get Sirius to give it up. It was to no avail, the boy's anger was too powerful. It'll be the death of him.

"Paddy, Snape just slid Regulus a note. He's actually smiling now."

James and Remus groaned as Sirius jumped to his feet.

And so it began.

The scene at that lunch repeated itself endlessly as Peter continued to craftily build up Sirius's anger at Snape. Sometimes, he would drop hints about Remus and the full moon in between mentioning Snape. As the days progressed, Sirius got a look in his eyes that told Peter that he had succeeded.

I've got you bastard.

Peter woke up on the fateful morning of the full moon and immediately rushed to the toilet and hurled his guts out.

I have to seem normal. They can't notice anything different.

Peter stared at himself in the mirror after washing his face. He took a deep breath and half-heartedly combed his hair. Normal.

Peter's plan for the day itself was simple. He had slipped James a Quik-Sick from Zonko's last night at dinner. It was crude, but he knew it would do the job. James could not be involved, he was the only one who could stop Sirius.

Peter stepped into the dorm room and was immediately met with a James who looked simultaneously green and white.

"Move Wormy! James is gonna be sick!"

Perfect.

Peter glanced out the window, night was almost here and the full moon was set to rise in a couple minutes. Peter was almost giddy with excitement, the rush of a plan well-carried out.

Just when Peter thought he had succeeded, however, Sirius scrambled into the dorm room.

"Pete! Peter, where's James?"

"Hospital Wing, he's been sick all day, you know this," he replied slowly.

"Wormtail, I think I screwed up, I really, really messed up," Sirius said, practically shouting at him. He had a wild look in his eyes that made Peter grip his wand tightly.

This isn't right, future-Sirius looked like he didn't care that he had sent Snape to his death. I'm too far in, Sirius can't feel guilty now.

"Padfoot, calm down. Why don't you sit down," Peter said carefully, mind racing, trying to figure out he could fix this.

"You're not listening! Peter, please, you have to help me fix this! I just sent Snape to the Shack."

"You idiot," Peter gasped, trying to contain his grin. His mind clicked suddenly as everything fell into place. "Sirius, you have to tell Dumbledore, he's the only one who can stop this. Go quickly."

Sirius looked more put together now that he had a purpose. "Right, right, of course, Dumbledore, of course, I-, right." He sprinted out of the room, probably expecting Peter to be right on his heels.

Well fuck that. Peter darted to the window where the full moon had already risen. And there! A small figure sprinting into the Shack, avoiding the quick swings of the Whomping Willow. That must be Snape. It's too late for Dumbledore to do anything! It worked!

"Peter…? Why are you still here? It's a full moon, shouldn't you be with Moony?" James had arrived.

"Sirius is probably down there, I figured Remus could do without my company for one moon, you seem worse off than he probably is anyway," Peter attempted, forcing a smile on his face at a moment where it felt more natural to break into maniacal laughter.

James seemed satisfied by that response. "You up for Snap?"

"Gladly."

The news broke the next day at breakfast. A special edition of the Daily Prophet spread whispers around Peter and James when they arrived.

"What's going on?" James hissed to Peter. "Oi, give me that," James snapped grabbing at a nearby first year's copy of the paper.

WEREWOLF STRIKES AT HOGWARTS! STUDENT MURDERED! DUMBLEDORE AND BLACK HEIR INCRIMINATED!

"What the fuck!" James cried out. "This is mad! Beyond mad! Where's Sirius, we have to figure this out. He wouldn't do this, Christ Pete! What are we gonna do?!"

"First of all James, you need to calm down. You're being too loud. Everybody is watching us," Peter hissed while practically dragging James out of the Hall. "Dumbledore's office is definitely where the action is, let's go!"

James seemed bolstered by Peter's words and the two boys raced off to the Headmaster's office. When they arrived however, there was a crowd of students and parents already present, all screaming at the gargoyle to let them into the office.

"A WEREWOLF AT HOGWARTS"

"WHAT WERE YOU THINKING!"

Professor McGonagall was there, trying to organize the chaos. "Silence, please! Donavon Walker, behave yourself!" she shouted at a middle aged man attempting to curse the gargoyle. His scared-looking son, Gilbert, was clutching at his father's sleeves.

I did not expect this reaction. Peter licked his lips nervously. I should have - Dammit! - I should have realized that people were going to put the blame at Dumbledore's feet. It's fine, Dumbledore is the one who allowed a werewolf at this school, and he is the man who always fails to punish Sirius properly. Dumbledore is why Sirius is so fucking crazy!

Meanwhile, McGonagall was clearing everybody out. She sent the students back to their dorms and announced that classes were cancelled for the rest of the day while the teachers sorted out this mess. "Anybody who is not a student of Hogwarts is to leave immediately! I will not allow this behavior, especially from grown men and women that I taught!"

There was some grumbling, but the crowd cleared out as everybody obeyed McGonagall's authority. She turned to look at Peter and James, who had refused to move. She sighed at their determined faces and some of the fight left her body, and exhaustion flooded in. McGonagall, as well as several other teachers, had probably been up all night long, trying to deal with this mess. Peter felt powerful, knowing that this was all because of him. I did this! This is all because of me!

As the boy patted himself on the back for his own cleverness, McGonagall began to speak to them. "I must apologize to the two of you for what has happened. I know this must feel like a betrayal of the highest order. I am afraid, however, that you are too late. Black and Lupin are both at the Ministry, awaiting their trials. Or rather," she said hesitating briefly, "Black is awaiting his trial. Lupin has already been sentenced."

"Se-sentenced!" James managed. "What even happened last night?"

McGonagall's face dropped as she realized that James was absolutely clueless. Her arm rose briefly and seemed like she wanted to comfort James, but she immediately dropped it. "Mr. Po- James, something terrible has happened. Mr. Black taunted Mr. Snape into heading into the Shrieking Shack on the night of the full moon." She paused again, and forced the next words out of her mouth, "Mr. Lupin mauled Mr. Snape to death. He is to be executed."

"No, NO! This can't be right! Sirius would never- he understands what this means!"

"James, please," Peter attempted, putting his hand on the other boy's shoulder. James was going through the same revelation that Peter had during the vision. He was realizing what a horribly cruel person Sirius Orion Black truly was. "It's going to be okay," he said as James broke down sobbing, falling to the floor. Peter embraced him, hoping that his best friend would find some comfort, all while burying his face in James's shoulder so that nobody could see his bright grin.

Over the next few years, Hogwarts and the rest of the Wizarding World went through several dramatic changes. Sirius Black was sentenced to life in Azkaban without hope of parole. Remus's execution was conducted with some mercy for a werewolf, and he was simply pushed through the Veil of Death. Albus Dumbledore was suspended from his positions as Headmaster, Chief Warlock, and Supreme Mugwump. Minerva McGonagall took the role of Head of Hogwarts and Abraxas Malfoy rose to fill the role of Chief Warlock as the conservative party took the majority in the Wizengamot. Anti-werewolf legislation was passed at an astonishing pace as the people cried for punishment.

A week after the Werewolf Incident itself, Severus Snape was quietly buried in Cokeworth. The only Hogwarts attendees were Peter Pettigrew, James Potter, and Lily Evans, who quickly found solace from her grief in James's arms. The two of them grew closer, and so did Peter and James, whose bond of brotherhood had been forever strengthened.