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ellecdc · 2 months

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How about a fic where Remus falls for reader who is Sirius’ sister? If Sirius freaks out with Regulus and James, just imagine how protective he would be with a sister! Specially if she is sweet and kind (totally opposite of him and Regulus)

will I ever make a sibling fic that isn't chaotic? no, likely not. also, I didn't exactly make her the opposite of Sirius and Regulus but it could be argued that she's better than them anyways. ALSO, I've always refrained from reader-inserts with Black!sister reader simply because I see her as Reggie's twin who looks the way he does, and also can't get beyond the fact that she would have a celestial name SO, in any Black!sister fics going forward, please note that her middle name will have been Soleil which is French for sun, and the boys call her Sunny as a nickname <3

Remus Lupin x Black!sister reader who he has fallen head over heels for [1.5k words]

CW: siblings, threats of murder

Most boys at some point in their lives will be asked the following question:

Are you a mummy’s boy, or a daddy’s boy?

If a boy wasn’t asked such a question, it was likely because the answer was painfully obvious.

“Little Lucius Malfoy is such a daddy’s boy.”

“That James Potter, such a mama’s boy”.

“Oh, sweet Peter Pettigrew, he has always been a mummy’s boy.”

Since the answer was so painfully obvious, neither Sirius Orion Black or Regulus Arcturus Black had ever been asked this question. For them, the answer was simple:

They were their sister’s boy’s.

It was this fact that made Remus Lupin’s current predicament so bloody difficult.

“Where is she!?” Regulus barked as he stormed over to the Gryffindor table where Sirius was sitting beside James across from Remus and Peter.

“Goodmorning, Reggie.” Sirius offered instead of answering his brother.

“For Sala- hi, Sirius. Where is she?”

“Where is who?”

“Your sister.” Regulus spat, causing Sirius’ brows to furrow as he chanced a look over his shoulder at his brother.

“How is she my sister? She’s your twin.”

“Nevermind that, do you know where she is?” Regulus muttered.

Sirius sighed and stood from his seat to scan the Great Hall.

“Nope.” He offered with a pop of the p before returning to his breakfast.

“I’m going to avada that meddling witch!” Regulus hissed as he stormed off; Remus, James, and Peter all watching after him as Sirius continued happily with his toast.

“Are….you not worried about her?” Peter asked cautiously then.

“Not really.” Sirius responded quickly.

James let out a breath at that and shook his head in disbelief. “Siblings are weird, mate.”

“Thanks, Siri.” You chimed as your head popped up between James and Sirius; the former shrieking not unlike a displeased mandrake plant as he clutched at his chest.

Neither you nor Sirius paid him any mind as Sirius nudged his plate closer to you so you could pick from it.

“What’d you do now?” Sirius asked.

“I simply told one of Reg’s admirers that he was already seeing someone; I hardly see what all the fuss is about.” You offered simply, causing Sirius to look at you in bemusement and mutter “Reg is seeing someone?” at the same time James looked at you in horror and hissed “Reg has an admirer!?”

You simply smirked and looked at Remus who was sitting across from you and shot him a wink.

He hoped to all get out that no one noticed the heat radiating in his cheeks as he smiled nervously down at his plate, though he was relatively certain he could feel a set of spectacled eyes burning a hole into the side of his head.

“Wait, why do you look like that?” Sirius asked then, causing the table to look at him to see he was surveying your form.

“Like what?” You asked him slowly, looking down at your uniform as if to see what Sirius could possibly be talking about.

“You look…like…nice.” Sirius muttered as if that was a particularly bad thing.

“I always look nice.” You argued then.

“That’s not true, you usually just look fine.”

“You’re such a git.” You spat, taking the piece of toast he had in his hand and taking a bite of it.

“Doesn’t she just usually only look fine?” Sirius asked then, and Remus was horrified to see he was looking at him.

“Me?”

Sirius nodded impatiently as if saying “yeah? What about it?”

“Why are you asking me?” Remus asked somewhat shrilly.

“You’re objective.”

“And Peter and James aren’t?”

Sirius huffed as he kicked Remus in the shin under the table. “Would you just answer the sodding question?”

“I…well,” and Remus looked at you - you, who always looked nothing short of lovely and radiant and dauntingly perfect in every way, and today had been no exception. But he couldn’t very well say that. “She…she looks fine, yeah.”

Sirius’ brows furrowed further as he turned back to look at you, and Remus tried to pretend he didn’t notice a brief look a hurt cross your features. “You do, though. Look lovely today, that is.” He added awkwardly, simply receiving a half-smile in response.

“Sunny!” Regulus barked then; apparently having found his way back to the Great Hall in his search for you.

“Oh, Merlin and Morgana.” You grumbled as your head fell back in exasperation.

“What did you tell him?”

“Who?” Sirius and James parroted.

“Sunny.” Regulus repeated, his gaze never moving from you as he sidled up behind you. “What did you tell him?”

“Oh, stop with the theatrics, Regulus; you’re embarrassing yourself.” You drawled, sounding like a true upper-classman as you refused to look at your twin.

“What did you tell Fenwick?” He gritted out slowly in a way Remus was sure would make a lesser man cower, but you simply rolled your eyes at him.

“I simply told him that he was grasping at billywigs because you were already seeing someone.”

Regulus held your gaze as you raised your eyebrow at him. “That’s it?”

“That’s it.” You hissed, completely unimpressed.

“Who in the hells are you seeing?” Sirius asked then, causing the two of you to look over at him.

“Nevermind, Siri.” You responded in a bored tone around another bite of his toast.

“I will too mind, thank you very much! Who is my baby brother seeing!?”

“Oh relax, Sirius, there’s no need to call the DMLE; it’s not like Sunny’s seeing anyone.” He chuckled, causing Sirius to snort in laughter.

“That’s true.”

You made a disbelieving sound as you looked between your two brothers. “What in Merlin’s name is that supposed to mean?!”

“That means, my dear baby sister,” Sirius responded curtly as he yanked his toast back from you, “that you must never date, otherwise your big brother will end up in Azkaban.”

“Oh give us a little credit, Sirius; we’d get away with it.” Regulus countered.

“Why!?” You beseeched.

“No one is good enough for you, obviously.” Sirius responded simply, as if you were quite ridiculous for even needing to ask.

“And anyone who thinks otherwise will end up dead.” Regulus continued earnestly, causing James to bark a laugh.

“Don’t worry Moons, Pete and I will make sure your funeral is nice.” He said as he brought another spoon of cereal to his mouth.

Remus felt all blood drain from his face as everyone turned to look at him.

Regulus stared at him in a confused sort of horror, Peter looked at him with a sympathetically worried expression, Sirius didn’t look exactly horrified or disgusted as Remus had thought he would, but he definitely looked disturbed to some level, and you were looking at him with what he thought (and certainly hoped) was hopeful surprise.

James looked up at the silence to see everyone staring at Remus, whilst Remus just stared at him in betrayal.

“James!?” Remus whisper shouted; his voice having apparently run off along with his bollocks.

“What’s that supposed to mean?” Regulus finally asked then, staring daggers at Remus as Sirius raised his hand slightly as if warning Regulus off of his best friend, though never removing his own scrutinising gaze from Remus.

“James, what’d you mean by that?” Sirius asked James - eyes still glued to Remus.

“I, well, erm. I’m actually, not entirely sure? I just…well…”

“Do you fancy her, Moony?” Sirius whispered as if it was some horrid joke and so completely unfathomable that Remus could possibly find you as enchanting as he admittedly did.

No, he wanted to say, of course not, Pads. That’s your baby sister, I’d never fall so head-over-heels for the sister of my best friend, that’s absurd.

But that wouldn’t be true.

And he’d already been outed.

His gaze moved to you and offered what he hoped was an apologetic smile before opening his mouth to respond.

“Regulus is shagging James!” You blurted then, causing James to flinch so violently that his knees hit the bottom of the table top, and Regulus deflated severely from where he’d been staring down Remus like some well-trained guard-dragon.

“Are you fucking kidding me!?” Sirius shrieked then, turning to point his glare at someone other than Remus, finally.

Remus had been so caught up in the verbal volleying taking place between Sirius, Regulus, and James that he hadn’t noticed you had disappeared from your spot beside Sirius until you popped back up beside him and were encouraging him up by the sleeve of his uniform jumper.

And you looked so sweet and so lovely and so hopeful and so mischievous and Remus really was helpless in the pull you had on him, which saw him rushing out of the Great Hall with your hand in his as you dragged him away from your brothers and laughing all the while.

So yeah, this made Remus Lupin’s current predicament incredibly bloody difficult.

Because if Sirius and Regulus were sister’s boys, you were your brothers’ girl.

And that made Remus Lupin a dead man walking.

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