Here is the next chapter! I know that the scene in the Order of the Phoenix took place after an O.W.L. exam, but I am using creative license to change that. Hope it doesn't bother too many people. But a lot of this is taken directly from the book.
Disclaimer: I don't own any part of Harry Potter.
The Marauders had never had more fun. They had the cloak and the finished map, monthly excursions on the full moon, and Remus looked more healthy and happy than ever. Their pranks became more fun and elaborate as well. James got a detention for charming Minnie's hat to shout "GRYFFINDOR!" every five minutes. Siri spent an entire evening scrubbing out cauldrons for Professor Slughorn when it was discovered that she had spiked the entire school's food with a Befuddlement Drought.
That Christmas Siri gave each of the marauders their own mirror that they could use to contact each other with when they were apart or in separate detentions. Not that Moony or Wormtail ever got caught. Remus was much more of a behind the scene researcher, and Wormtail was absolutely phenomenal about getting away. Most often they were just condemned by being in association with Siri and James.
However, they had to calm down come spring time. With their O.W.L.s approaching, they spent most of their time holed away in the library.
Full moons brought around another surprise. Remus had gotten even bigger, and Madame Pomphery told him later that as a werewolf, he was now fully grown. None of them had expected Moony to attack Padfoot, intent on mating with her. James had only just managed to pry him off of her, and she had hid under the upstairs bed for the rest of the night, listening to the howls and frustrated growls as Prongs stopped his attempts of getting to her.
Without telling the matron the details of what had occurred, Remus asked about the need to mate, to which she assured him that it lasted only two months out of the year. Siri would just have to wait and sit out the following month as well.
Although the incident had been frighteningly serious at the time, it had given a supply of great mirth to the marauders.
"I always suspected Moony had a thing for Pads." James teased.
"Remus, you ought to know that you usually first take the girl out to dinner before you try something." Peter said.
Siri did not know that Remus' face could become that particular shade of vibrant red.
One day, she was sitting out by the lake under a tree with her boys, watching James play with his 'borrowed' snitch in an attempt to impress Lily, who was over by the water's edge. The only attention he was really getting was from Peter, who clapped enthusiastically every time he made a particularly difficult catch.
"Cut it out James, before Wormtail wets himself." Siri snorted from where she lay on her back in the grass. "Ugh! I'm so bored!"
"You can help me study for Charms." Remus said, holding out his book with a faint smile. He knew she would never go for it.
"Uh, yeah, not that bored yet." She said, pushing the book back in his direction.
"Well I see something." James said with a mischievous glint in his eyes. Siri propped herself up on her elbows to follow his line of sight. Snape was reading his notes a short ways away.
"Excellent. Snivellous." She smiled. After the way he humiliated her over the summer, she would do anything to get him back. James helped her to her feet, and Wormtail scrambled up after them. Moony stayed where he was, a frown on his face and staring at the same spot on his page. He clearly wasn't reading, but didn't seem to want to watch either.
"Hello, Snivellous." James said pleasantly. Snape reacted so fast it was as though he had been expecting an attack: dropping his bag, he plunged his hand inside his robes and his wand was halfway into the air when James shouted, "Expelliarmus!"
Snape's wand flew twelve feet into the air and fell with a little thud in the grass behind him.
Siri started to grow uneasy. Just a few seconds ago it had seemed like a good idea to remind Snivellous that he could not get away with everything he had done to her. Now she was already starting to regret it. He had a glint in his dark eyes that told her she would pay for this. He made a dive for his wand, but was knocked off of his feet halfway by James' Impediment Jinx.
Students all around had turned to watch. Some of them had got to their feet and were edging nearer. Some looked apprehensive, others entertained.
Snape lay panting on the ground. James and Siri advanced on him, wands raised, James glancing over his shoulder at the girls at the water's edge as he went. Wormtail was on his feet now, watching hungrily, edging around Remus to get a clearer view, sniggering. Snape was trying to get up, but the jinx was still operating on him; he was struggling, as though bound by invisible ropes.
"You - wait," he panted, staring up at James and Siri with an expression of purest loathing, "you - wait!"
Siri felt uneasy again as he then started to yell a mix of swear words and hexes, but with his wand ten feet away nothing happened.
"Wash out your mouth," said James coldly. "Scourgify!"
Pink soap bubbles streamed from Snape's mouth at once; the froth was covering his lips, making him gag, choking him -
"Leave him ALONE!" Yelled a familiar voice. It was Lily, and she looked furious. Of course, she was still friends with Snape, as Siri had never told her what happened between them over the summer.
"All right, Lily?" said James, and the tone of his voice was suddenly pleasant, deeper, more mature. Siri didn't think Lily would fall for that at the moment.
"Leave him alone," Lily repeated. She looked at James with every sign of great dislike. "What's he done to you?"
"Well," said James, appearing to deliberate the point, "it's more the fact that he exists."
This was the wrong thing to say. It was obvious to the marauders that Snape was not a pleasant person, but not so much to Lily. The comment just made her even angrier.
"You think you're funny," she said coldly. "But you're just an arrogant, bullying toerag, Potter. Leave him alone. And Siri! I expected more from you!"
"I will if you go out with me, Evans," said James quickly. "Go on, go out with me and I'll never lay a wand on old Snivelly again."
Siri forced herself not to roll her eyes at her friend. Could he have picked a worse time to ask her out?
"I wouldn't go out with you if it was a choice between you and the giant squid," said Lily.
"Bad luck, Prongs," said Siri. She would berate him about his horrible wooing skills later. She turned back to look at Severus. The Impediment Jinx was wearing off, and he had already started to inch towards his fallen wand, spitting out soapsuds as he crawled.
"OI!" She shouted.
But too late; Snape had directed his wand straight at James; there was a flash of light and a gash appeared on the side of James's face, spattering his robes with blood. Siri gasped, surprised that he had resorted to a lasting physical violence. James whirled about: a second flash of light later, Snape was hanging upside-down in the air, his robes falling over his head to reveal skinny, pallid legs and a pair of greying underpants.
Many people in the small crowd cheered; James and Wormtail roared with laughter. Siri laughed as well, albeit quieter. This was not going to end well.
Lily, whose furious expression had twitched for an instant as though she was going to smile, said, "Let him down!"
"Certainly," said James and he jerked his wand upwards; Snape fell into a crumpled heap on the ground.
"There you go," he said, as Snape struggled to his feet. "You're lucky Evans was here, Snivellus -"
"I don't need help from filthy little Mudbloods like her!"
Siri's mouth dropped open. Had he just... insulted Lily?
"Fine," Lily said in a betrayed sort of voice. "Fine. I won't bother in the future. And I'd wash your pants if I were you, Snivellus."
Severus seemed to realize what he did, and a horrified look crossed his face. Lily just turned on her heel and hurried away.
"Lily! Lily, I'm sorry!" he called.
"Lily! Oi, Lily!" James yelled as well, trying to get her back on his side.
But she didn't look back.
"Right," said James, who looked angry now, possibly still at Severus for calling her that, or for making a fool out of himself again. It was difficult to tell which. "Right -"
There was another flash of light, and Snape was once again hanging upside-down in the air.
"Who wants to see me take off Snivelly's pants?"
"Urgh! James, no! Nobody wants to see that!" Siri protested. "Come on, put him down. We've done enough for today."
Prongs reluctantly put down the Slytherin, and before he could compose himself enough to hex them back, Siri pulled James and Wormtail back into the castle, Remus following along behind them. Siri did not speak, but walked in silence back up to the Gryffindor tower, contemplating what horrific revenge she had just set herself up for.