The confrontation with Snape is in this chapter, which was not in the last one because I felt that everything was happening too quickly for my taste. I hope it works here.
I also really, really hate the werewolf in Prisoner of Azkaban, so you will notice I describe a bit more of a different werewolf here.
The plot deviates again in this one. Tell me how you like it!
Disclaimer: I do not own Harry Potter
There was a bang and a blue light, and then a rodent-like man stood in the rat's place.
"Good to see you again, Peter." Siri spat.
"R-Remus? Siri! My old friends..." he attempted before seeing it as a lost cause and running toward the door. Remus and Siri grabbed him and threw him back. He looked only a little better than Siri did herself. He had the look of a fat man who become skinny very quickly, and was loosing a lot of his hair. He had been transformed as a rat for so long that he was beginning to take on physical rat-like traits. His nose was more pointed, his nails like claws, and two protruding front teeth. He even snuffled about like a rat. The traitor looked around quickly.
"H-Harry? Look at you!" He simpered. "You look so much like your father, like James! We were the best of frie-"
"How dare you!" Siri screeched, loosing her composure. "How dare you speak to Harry! How dare you talk about James in front of him!"
He had no right, none! Siri placed herself between the traitor and her godson, even though she had no wand. Peter tried to take advantage of the shift in positions to run toward the door again, but Remus cut him off before he could.
"You sold James and Lily to Voldemort, didn't you?" Remus growled.
"I didn't mean to!" Peter wailed, looking towards Siri to try to appeal to her again. "It was the Dark Lord, Siri! You have no idea of the weapons he possesses! What would you have done, Siri? What would you have done?"
"I would have died!" She yelled, furious that he would even think that of her. "I would have died before I betrayed my friends!"
"You should have realized, Peter, that if Voldemort didn't kill you, we would!" Remus shouted, raising his wand higher to cast the spell.
"No!" Harry burst out from behind Siri. Remus paused slightly and sighed.
"Harry. This man is-" he began.
"I know what he is. But if he is dead you can't prove that Siri is innocent!"
"Oh thank you, Harry! Oh thank you!" Wormtail began.
"I didn't do it for you." Harry spat. "I did it for Siri and Remus. I don't think my dad would much like the idea of them becoming killers and locked away. Just for you. We will take you up to the castle. Then the dementors can have you."
"Alright." Remus said at last with a nod. "But if he tries to run, I will kill him. Do you agree, Harry?"
Harry looked at Wormtail and gave a firm nod so that the rat could see it. He gave a nervous whimper and Remus hit him with the incarcerous charm that bound his arms together.
"Can you walk?" Siri asked Ron.
"I... I think so." He said. He still looked very pale after seeing his long time pet becoming human before his eyes.
"Come help me, Harry." Siri said, grabbing him by one arm and helping him up. Harry grabbed his friend's other side, and slowly the six of them going out the hidden entrance and down the tunnel beyond.
...
Siri, Ron, and Harry emerged from the Whomping Willow first. They set Ron down off of his leg as Hermione followed close after them. Remus and Wormtail were still out of sight, due to the fact that Peter was not making the journey and easy one for his old friend.
Siri left Ron under the attention of Hermione, and walked off a short ways away to get a better view of the beautifully lit Hogwarts castle. Harry had stayed close beside her, something which cheered Siri greatly.
"It is beautiful, isn't it?" Siri sighed as she looked at the school. "I will never forget the first time I walked through those doors. It will be nice to do it again as a free woman."
Harry gave an understanding nod.
"Harry..." Siri began tentatively. "Once I am free- I mean, I will understand if you would rather stay with your aunt and uncle, but given what I saw over the summer- but if you ever wanted a different home-"
"Are you mad? Leave the Dursley's? Of course I want to!" Harry gasped. "Do you have a house? When can I move in?"
Siri was thrown for a moment by his enthusiasm, but then broke into a grin.
"Really? You mean it?"
"Of course I-!"
"How touching."
Both Siri and Harry jumped, turning to the source of the voice only to see Severus Snape himself pull off James' old invisibility cloak with a flourish. His wand was in Siri's face.
"Ah, vengeance is sweet. How I hoped I would be the one to find you." Snape said with a nasty smile. "I told Dumbledore an old flame was helping you into the castle, and here is the proof."
He motioned to Remus at the roots of the Whomping Willow who was going through the arduous process of pulling and wrestling Wormtail free. But the rat was not yet in the Potion's Master's line of sight.
"Brilliant, Snape." Siri said coldly. "Once again you put your keen and penetrating mind to the task and come up with the wrong conclusion."
Snape scowled and jabbed his wand into the crook of Siri's neck.
"Give me a reason." He said. "I beg you."
"Why don't you go on and play with your chemistry set?" Siri snapped.
He jabbed his wand further into her neck.
"I could do it, you know. But why deny the dementors the satisfaction?" he asked, his eyebrow arching. Siri felt her insides grow cold.
"Do I detect a flicker of fear?" He asked, "Oh yes. The Dementors Kiss. One can only imagine what that must be like to endure. It is said to be nearly unbearable to witness, but I will do my best..."
"Professor, please-" Harry tried.
"Quiet, Potter. You are in enough trouble as it-"
"HARRY!" came Hermione's scream. All three of them looked back up to the others.
"Pettigrew? But how...!" Snape gasped. But Siri was focused more on what Hermione was pointed at. The full moon had risen beyond the mountain tops, and Remus was staring at it, transfixed.
Peter was taking the opportunity to grab Remus' fallen wand, which Hermione promptly disarmed from him.
Siri desperately pushed Harry towards Snape.
"Keep him back!" She yelled as she ran towards Remus. Peter had transformed and was getting away, but they all could die if she didn't help Moony now.
"Remus! Remy, Have you taken your potion tonight?" Siri asked, helping Ron and Hermione in the direction of Harry and their professor before going to him. His mouth was open, his teeth elongating. His eyes had already dilated and turned a bright amber.
"You know the man you truly are, Remus!" She said, trying to keep him in control for as long as possible so that the others could get away.
"Your heart is where you truly live, this heart, here!" She threw her arms around him as he started to jerk and twitch. Remus grew rigid, his back popping as his spine elongated. His clothes started to tare as he grew, his hands and feet growing into claws. He howled and shook his head as his mouth was stretched into a muzzle and his head molded into a wolves. Fur grew everywhere, covering him in a light brown coat, and his tail twitched with it's new life.
Siri found herself flying backwards as he threw her off of him, and hit the ground hard. Remus stayed put for a moment, panting and whimpering in pain. Siri changed into a dog and got onto all fours, running towards him. He sniffed and looked in the direction of the others. Siri howled the best she could and got his attention again. Moony paused, and Siri saw his tail wag slightly as he recalled his old friend. He looked back the way the others fled as if trying to decide to go after them.
Siri barked at him again and wagged her tail, trying to entice him towards her. Moony wagged his tail in return and followed her into the forest.
...
Siri woke the next morning in the arms of a very naked Remus. It was not the first time, but still she blushed and covered him with the outermost layer of her Azkaban robe.
"Ms. Black."
Siri jumped a foot into the air and twisted to look around behind her. Albus Dumbledore stood between the trees. She blushed again to think about how long he had been standing there.
"H-Headmaster Dumbledore." she returned.
"Imagine my surprise when one of my professors and three of my students returned from the castle late at night with a very similar wild story of a convict, a werewolf, and a dead man."
"It sort of sounds like a beginning to a bad joke, doesn't it?" Siri said weakly.
"Indeed it does." He said, his eyes sparkling. "But I do believe what they told me."
"You do?"
"I do. It is difficult to constitute the fact when even Professor Snape agreed that your innocence might just be possible."
"Really? I thought he might have lied." Siri said.
"Severus has changed. I would not have let him near the students otherwise. He is a bitter man, but he is not what you remember."
Siri didn't say anything. There was a groan behind them, and Remus slowly sat up. He grew red at the sight of Siri's robe covering him, and then grew pale very quickly again when he saw Dumbledore.
"Ah, good to see you up and about." the Headmaster said calmly. "I must commend you. Your teaching saved a numerous amount of lives last night."
"I... what?" He asked.
"After the others went off, I am afraid they ran into the entire swarm of dementors. They all would be worse than dead if it wasn't for Harry, who preformed a fully formed patronus. A stag."
Siri felt her knees grow weak, and propped herself up against a tree. An entire swarm of dementors...
"Holy merlin." She whimpered pitifully.
"Don't worry. They are all fine. And nobody is speaking a word of your involvement, Siri. As for Remus' condition however..."
"Snape told someone?" Siri asked.
"The entire Slytherin house, I believe." He frowned. Siri scowled. Of course Snape had not changed that much.
"Then I will have to resign, Headmaster." Moony sighed. "The letters will start coming soon, and then the matter will appear before the School Board of Governors."
"Very well." Dumbledore said solemnly. "But might I suggest we go back up to the castle? I know that there are some people who wish to see you."