A HORIBLE MISTAKE
PART 1 OK HIII SO THIS IS A NOTHER FIC, READER X MARAUDERS (later sirius) :the marouders prank gone wrong and y/n just getting revange, being bad ass and loving the chaos hope you injoj agein english is not my first language so im sooo sorry for the mistakes and hope you injoj ps. part 2 may come out today aswall
I was sitting at the Slytherin table, completely soaked because one of the Marauders’ pranks had gone wrong and hit me instead of Severus.
I lifted a hand to my face, wiping the water away from my eyes.
“Oh, fuck… now they really messed up,” Barty said beside me.
My eye twitched with anger and annoyance, but I closed my eyes, took a deep breath, and said, “Regulus, could you dry this?”
My voice was calmer than the situation deserved.
Regulus complied, and I was dry in a matter of seconds. I took another deep breath and started eating again.
“Whoa… you aren’t gonna unleash hell on them?” Barty asked, clearly shocked by my reaction.
I looked up from my food. “Oh, don’t worry, Jr… they’ll get what’s coming to them… at the right time.”
A cold smirk spread across my face as I was already planning my revenge. I glanced over my shoulder to see the Marauders’ reaction. They were looking at each other with worried expressions and whispering.
“Try not killing them, Y/N, will you?” Regulus said, uninterested.
“I’ll try… no promises,” I replied, going back to eating.
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The next day, the Great Hall was louder than usual.
Word had spread.
Not about what happened—no, everyone already knew about that—but about the fact that nothing had happened after.
No yelling. No curses. No retaliation.
And that was worse.
I walked in like nothing had happened, robes perfectly in place, expression calm.
At the Slytherin table, Barty leaned closer the second I sat down. “You’re enjoying this, aren’t you?”
I didn’t look at him as I reached for a cup. “Immensely.”
Regulus, sitting across from me, barely glanced up from his book. “They didn’t sleep much,” he said casually.
That made me pause.
“Oh?”
“They think you’re going to do something,” he added, turning a page. “They just don’t know when.”
A small smile tugged at my lips.
Perfect.
Across the hall, the Marauders were louder than usual, but it was forced. James Potter was laughing a bit too hard, Sirius Black kept glancing around, and Remus Lupin looked like he already regretted everything.
Only Peter Pettigrew looked completely lost.
I met Sirius’s eyes for just a second.
Then I smiled.
Slow. Cold.
And looked away.
Barty choked on his drink. “Merlin, that was terrifying.”
“Was it?” I murmured, feigning confusion.
When I was done with my food, I stood up abruptly, which caused the Marauders to flinch slightly. I smiled to myself and started walking toward the Gryffindor table.
The Marauders looked horrified and held their breath but I ignored them and went toward Lily Evans.
I smiled sweetly. “Hi, Lily. I was just wondering if you could lend me your Potions notes. I missed a few things last lesson.”
Lily smiled back and nodded. She was great a genuinely good person. I had been raised in a family where blood didn’t determine your worth, but your abilities did. So when I came to Hogwarts I didn’t have any prejudice toward Muggle-borns even as a Slytherin.
“Yeah sure. Do you need anything else?” she asked.
I shook my head. “No,that’s it.”
She reached into her bag and handed me the notebook. “Here but could you give it back just a bit before Potions?”
“Yeah of course. I’ll give it back as soon as I’m done. And thank you again Lils.”
I slipped the notebook into my bag and headed for the door
---------------------
The next morning was even better.
The Marauders looked like they hadn’t slept a wink. Their hair was a mess, uniforms wrinkled—overall, they looked horrible.
“I almost feel bad for them,” Evan said. “Almost.”
“So… what are you planning to do?” Severus asked.
I ignored him completely.
Personally, he quite disgusted me. He thought himself clever, but in truth… he lacked something. Something important.
Beside me, Regulus slipped his book into his bag. “Actually… what are you planning?” he asked, now genuinely interested.
I smirked.
“You’ll see, Regy… you’ll see.”
My eyes darkened slightly, the smirk turning colder.
“Merlin, Y/N, you’re scaring me right now,” Barty said, placing a hand over his chest in mock fear. “Turn whatever this is down a notch.”
I glanced at him, unimpressed.
“You’re still here, aren’t you?”
Barty grinned. “Fair point.”
Across the hall, the Marauders were already watching me.
Waiting.
Again.
Good.
I leaned back slightly in my seat, completely relaxed under their attention, and picked up my drink like this was just another normal morning.
--------------------
By dinner, the Marauders weren’t at their table.
And I knew why.
My revenge had finally arrived.
I was smiling to myself while eating, the Skittles around me glancing at each other like they were silently asking, Should we ask her?
“Stop looking at me like that and just ask,” I finally said.
“So… what did you do?” Evan asked.
I smiled.
“A lot of things.”
“As in…?” Regulus said, now quite interested, putting his book down.
I smiled wider. “You’ll see.”
A small giggle slipped out.
Evan, Barty, and Regulus exchanged worried looks.
“Hahaha, don’t worry,” I said, my smile growing. “No one will die.”
“Remind me not to get on your bad side,” Evan said, clearly excited to see what I’d done in retaliation.
And then
the doors opened.
The entire hall went quiet.
The Marauders walked in.
With donkey ears.
Cat tails.
Goat legs.
And whiskers.
They looked absolutely dejected.
For a second, no one said anything.
Then
someone laughed.
Then another.
And suddenly the whole Great Hall erupted.
James looked like he wanted to disappear. Sirius was trying and failing to hold onto whatever dignity he had left. Remus had his face half-covered, clearly mortified, and Peter looked like he might cry.
Barty slammed his hand on the table, laughing. “NO , no way, you did NOT”he fell of his chair lathing histarecly
Regulus actually froze for a second before letting out a quiet, disbelieving breath. “…You turned them into a petting zoo.”
I took a slow sip of my drink.
“Temporary,” I said calmly.
Evan grinned. “How long?”
I didn’t look away from the scene.
“Long enough.”
Across the hall, James’s eyes finally found mine.
Fury.
Embarrassment.
Realization.
I met his gaze.
And smiled.
Slow.
Cold.
Unapologetic.
Sirius followed his line of sight and when he saw me, his expression dropped.
“Oh, they know,” Barty whispered, delighted.
“Of course they do,” I murmured.
“Hell hath no fury like a woman,” Dorcas said, looking at me like I was some saint she’d just decided to worship.
“How, for Merlin’s sake, did you do that?” Severus asked.
I ignored him.
At this point, his voice irritated me more than anything.
After dinner, I stood up and started walking back toward the Slytherin dungeons.
I didn’t even make it halfway.
“Oi!”
hothes hurried behind me.
I didn’t stop.
“Y/N.”
I kept walking.
Then a hand grabbed my arm.
I stopped.
Slowly.
Turned.
Sirius Black stood there still looking like a satyr gone horribly wrong.
Goat legs.
Tail.
Ears.
And that expression somewhere between furious and humiliated.
I looked him up and down.
Deliberately.
Slowly.
Then met his eyes.
“…You look ridiculous.”
His jaw tightened. “Fix it.”
I raised a brow. “That’s not how apologies work.”
“We didn’t—” he started, then stopped clearly thinking better of it. “It wasn’t meant for you.”
“And yet,” I said calmly pulling my arm free, “it hit me.”
“That’s not the point.”
I tilted my head slightly. “Oh? Enlighten me.”
His eyes flashed. “You’ve made your point.”
“Have I?” I asked softly.
A pause.
Then I stepped closer.
Not enough to touch just enough to make it uncomfortable.
“Because from where I’m standing,” I continued, voice low, “you humiliated me in front of the entire hall… and all I’ve done is return the favor.”
Sirius let out a sharp breath. “This is not the same.”
I glanced down at his legs.
“…No,” I agreed. “This is better.”
For a second, he looked like he might actually curse me.
I almost wished he would.
“But this ends now,” he said.
I smiled.
“No.”
His expression darkened. “No?”
“You don’t get to decide when this ends,” I said quietly. “I do.”
A beat of silence.
Then very deliberately I leaned in just enough to whisper:
“Check your hair in the morning.”
And stepped back.
Sirius froze.
“…What did you do?”
I just smiled.
Turned.
And walked away like I hadn’t just ruined his entire night.
Behind me, I could hear him hesitate
like he didn’t know whether to follow me…or run to a mirror.
I hadn’t done anything to his hair.
I just liked the idea of torturing him a little longer.
It was very fun.
And very entertaining.
Soon, Dorcas came to our room, and we started chatting like we usually did, the tension from earlier melting into something lighter.
“Well,” she said, dropping onto the bed dramatically, “you’ve officially become my favorite person.”
I snorted. “I’m honored.”
“No, I’m serious,” she continued, pointing at me. “That was art. The ears? Inspired. The tail? Iconic.”
I smirked slightly. “You’re welcome.”
“And the way you just sat there like nothing happened?” she added. “Terrifying. Absolutely terrifying.”
“Good.”
Dorcas grinned. “Remind me to stay on your good side.”
“You should already know that.”
A while later, we headed down to the common room.
The moment we walked in, all heads turned.
And then
“THERE SHE IS!”
Barty’s voice rang out dramatically.
I sighed, already knowing where this was going.
Evan stood up, clapping slowly. “Brilliant. Truly. I don’t think I’ve ever seen Potter look that miserable.”
“Or Black,” Barty added. “Merlin, his face”
“ -worth it,” Evan finished.
Regulus was leaning back in his chair, watching me with a more thoughtful expression.
Not laughing.
Observing.
“You planned more than just that,” he said.
It wasn’t a question.
I met his gaze for a moment.
Then smiled faintly.
“Maybe.”
Barty lafed. “Oh no. There’s more?”
I dropped into a chair, crossing my legs casually. “I never said I was done.”
Evan looked delighted. “This just keeps getting better.”
Dorcas flopped down beside me. “If they survive the week, it’ll be a miracle.”
“They will,” I said calmly.
A pause.
Then, almost as an afterthought
“They’ll just wish they hadn’t.”
That earned a mix of laughter and slightly concerned looks.
Barty pointed at me. “You’re enjoying this way too much.”
I didn’t even try to deny it.
