#big brother!sirius

[moonstruckme]

Hey love, im back to plague you with another idea...

A situationship / budding relationship james x reader where shes the Black brothers sister, but every time one of them catchs the two of them alone they physically pick her up and just walk away with that menacing Black stare.

Tysm love x

Thanks for requesting sweetheart!

James Potter x Black!reader ♡ 911 words

“Do you really think this is the best place to hang out?” you ask James, eyeing the closet in his dorm as if you’re brother’s going to come popping out. 

“It’ll be fine,” he promises you in that optimistic, sure-footed way of his. 

From the way Regulus had talked about Sirius’ friends at Hogwarts, you’d expected James to be insufferable. Arrogant, entitled, the true embodiment of the mask your oldest brother puts on when he’s here at school. But you’d discovered when you’d arrived that Sirius’ goofy friend wasn’t the James Potter you were warned about. He was self-assured, certainly. Confident, but in the years you’ve known him it’s never seemed like anything more sinister than that. James doesn’t walk into every room like he owns it; he walks in like it’s home. He brings that everywhere with him—that feeling of home, of belonging. It seeps into you when you’re with him, and to your brother’s acute repugnance, you’re with him more and more these days. 

“Remus is off with Lily, and Sirius got pulled aside by coach after practice, so he’ll be on the pitch running drills for a good hour yet,” James goes on. He sits down on his bed, and you follow suit. “Plus, your dorm is occupied and this is the only other semi-private place I could think of.” His smile goes a bit sheepish as he shrugs, one-shouldered and boyish. 

You catch his meaning—the privacy carries implications neither of you are ready to act on—and you’ve got no reason to feel awkward about that but a nervous laugh fizzes up out of you anyway. “Yeah, I guess you’re right,” you admit. Though Sirius is far from unaware of this blossoming whatever between you and James, neither of you are keen on him finding out through the grapevine that you were seen canoodling in the hallways. Privacy is ideal. “So, I’m guessing practice went better for you than it did for him?” 

James shrugs again, the show of humility making you both grin. You can never seem to stop doing that around him. “Yeah,” he says, “practice for a seeker is pretty straightforward. Less strategy to it, so I guess I got off easy.” 

“You make it sound like Sirius isn’t just hitting things with a bat,” you deadpan, and he laughs. The sound feels like sunbeams shooting straight into your gut. 

“It’s a bit more complicated than that,” he hedges. “But hey, are you coming to the party after the match on Saturday?” 

“Is there still going to be a party if you lose?” 

James fixes you with a look. “We never lose, sweetheart.” 

Another giggle bubbles out of you, though the joke isn’t really that hilarious. You secretly love when James calls you names like that. It makes your heart do all sorts of funny, acrobatic things. You don’t love that it’s probably not so secret, and he can almost definitely tell. His eyes go warm now, a knowing smile playing on the corner of his mouth. 

“Yeah,” you say, “I’ll think about it.” 

“You should come,” he encourages, leaning his hands back on the mattress. You very pointedly do not let your eyes linger on his forearms as he does so. “It’d make me happy to see you there.” 

“You’re always happy,” you tease. 

“That’s because you only see me when I’m seeing you.” You must look confused, because James’ clarifies, voice softening slightly, “I can’t help but be happy when I’m with you, sweetheart.” 

The combined effect of the words, the tone of his voice, the sweet way he’s looking at you—it starts up more than butterflies in your stomach. There’s got to be a whole ecosystem in there by now, with buzzing bees and jumping frogs and everything. You look down, a half-hearted effort to hide the smile that takes you.

“James,” you murmur, lightly chiding. 

The door comes open, and your brother’s eyes widen as they take in you on James’ bed, his hand an inch away from your leg and both of you looking terribly caught. Then they narrow. 

“James Potter, zip your pants back up right this instant!” 

“Sirius!” you exclaim, and there’s no lightness to this chiding, your face heating with mortification. You glance at James’ zipper, just to be sure—and yup, it’s fully closed, everything contained—and then glance quickly away, horrified all over again that you’d looked. 

“We weren’t even doing anything,” you seethe, knowing your stare matches your brother’s as you glower at each other from across the room. “What are you even doing back?” 

Sirius rolls his eyes, utilizing that older brother’s insouciance he knows gets under your skin like nothing else. “It seems you’ve gotten turned around. These are the boys’ dorms.” His words drip venom onto the dull red rug. “I’ll be happy to escort you back to yours. Let’s go.” 

“No.” You set both hands on James’ bed, feeling ridiculously petulant. Sirius raises a brow as if to say No? but you ignore him. “This dorm is as much James’ as it is yours, and he invited me here.” 

“Pads,” James says, not quite softly, but mildly compared to the fiery tones you and your brother are throwing back and forth, “we’re just talking.” 

“And now you’re done talking.” Sirius shrugs, stalking toward you. You grip James’ sheets a bit tighter on instinct. “If I recall, you have a potions’ essay to write, and you’re not—ugh.” He grunts, wresting you away from James’ bed using a hold that’s worked since you were kids. James himself offers no help, other than a sympathetic grimace as you’re hauled off. Sirius fixes him with a cold glare in return. “You’re not getting that done in here.” 

“You are so immature,” you gripe as he starts tugging you towards the stairs, your feet barely skimming the ground. 

“We can talk about—oi, quit!—we can talk about who’s more mature when you stop pinching me, you prick!” 

[nixnight1]

That one Big Bang Theory scene but:

James never loses his composure but sometimes like this when he's tired and lost and doesn't know what to feel, he brakes a little.

James: You LOST my mother's ashes??

The girl that works at the airport:...No...I-I'm just saying that sometimes bags are misrouted.

James: Alright FINE, where did you misrout the only woman who EVER LOVED ME.

--- an hour later ---

The girl: Mr and Mr Potter? As far as I can tell your bag arrived in LA

Regulus: So where is it?

The Girl: Well I don't know, perhaps somebody took it off the carousel by mistake?

James: So some stranger has my mother? It's thar what you're talking about? My poor mother can be anywhere in Los Angeles rightnow?

The Girl close to tears: I- I wish I was telling you that. Uhm but the passenger could have gotten on in an international flight

James: Okay, grate. So...your ENTIRE job is to find lost luggage, and you've narrowed down the location of my mother to the PLANET EARTH

--- James starts to walk away ---

Regulus to the girk: Listen to me very well, you better find my husband's mother's ashes, because one way OR ANOTHER we are walking out with a dead woman. Do you understand?

The Girl:...

Regulus: Do you?!

The Girl: Yes, sir

[ellecdc]

Mother, im sitting here at 4am, eating mini easter eggs and ive had tge most brilliant idea!! (Inspired by @inkdrinkerworld 's fic)

Okay so, poly!moonwater and readers been having trouble sleeping due to tensions/problems with her pureblood family. As a result shes been taking more naps, but they arent restful. So reader were napping in Rems bed (the dungeons were too cold) but after a fitful 30 minutes she gets up groggy, sleep deprived and beyond frustrated. She stumbles her way down to the common room, pin point Sirius lounging across the couch and promptly throws herself down to cuddle with him and continue her nap. Everyone (minus Siri) is shook. Jamie even asks if she got the wrong person because Reggie was sitting over there (in which he got a one eyed death glare before she burrowed into Siris chest and passed out).

Now, what everybody else didnt know was that Siri had more or less adopted reader as his own (she remined him so much of Reggie, being her big brother was 2nd nature). And while Barty was her person, he was a little too crazy to be comforting in this situation ("y/n, i'll get rid of them for you. Its not hard to do so" "Barty, no."). And of course Siri nows how bad their kind of familys are so he'd been taking care of reader on the down low as an older brother would.

Bonus if Reggie then decides that looks warm and fuzzy and wants Siri cuddles too so he joins ( it took him so long to get to a point where he could let himself be vunerable enough to openly allow Siri to take care of him 😭)

aweeee poor reader. this ended up being way more serious than I thought it would be? like it's not funny at all, there's no humour (which feels odd to me, usually I can throw some jokes or banter in there) but plenty of hurt comfort???.......idk, I can't tell if this is any good, it feels very different from my usual pieces

poly!moonwater x fem!reader whose family sucks (but it's very Sirius-centric)

CW: mentions of insomnia, mentions of abusive families, making fun of only children (sorry), hurt/comfort

You were miserable to say the least; you couldn’t remember when the last time you had a restful sleep was, and nothing you did seemed to help.

The closer it got to the Winter Holidays, the more your mind seemed to spiral. Every time you began to relax, your heart pounded as if you’d accidentally leaned too far back in your chair, reminding you of your upcoming visit home. Every time you closed your eyes, you were bombarded with images of angry faces and violent curses being shot at you.

The Slytherin dungeons were too cold, and every time you found your way into Regulus’ dorm, Barty insisted on butting in, and though you appreciated his support, you couldn’t handle his threats promises to burn down your home with your parents in it. 

Remus and Regulus both suggested you perhaps talk to Madame Pomfrey about getting some dreamless sleep or sleeping draught, but you were too embarrassed to admit to your two overprotective boyfriends that you’ve used them so frequently during your life for this very reason that they had lost all efficacy. 

It had gotten to the point that you managed to get the most sleep in the library bent over the table with your face on your book whilst Remus and Regulus did their work (and sometimes yours), and that honestly left you feeling more painfully tired than you had been before your nap.

So, you were nearly falling asleep at the Gryffindor table in the Great Hall over your chicken and roast potatoes when Remus gently nudged you and suggested you go lie down for a bit and you wanted to weep into your potatoes which was only slightly less embarrassing than sleeping in them, causing him and Regulus to bring you up to Gryffindor tower.

You’d kicked them both out of the Marauders’ dorm room after some time – Remus for snoring and Regulus because the sound of him turning the pages of his book was distracting you. He promised to stop reading, but then he breathed too loudly and you started crying.

You were overtired, emotional, and running on fumes.

You’d counted puffskeins, you’d had a warm glass of milk, you’d taken off articles of clothing and reconfigured your outfit numerous times (which was currently Remus’ jumper and no pants), and you’d tried every position imaginable to no avail. 

You think you might have perhaps gotten five minutes of sleep before you woke up with a start, a barely repressed scream grating through your teeth.

Feeling disturbingly weepy and no less groggy from your horrid sleep, you pulled on a pair of your sweatpants and grabbed the throw blanket from the end Remus’ bed before trudging down the stairs to the common room.

“You should have seen the look on Filch’s face- oh! Hi Y/N!” James called as you made your way over to the three-seater and stood over the black-haired boy currently occupying it.

“Oh, Trouble.” He cooed sympathetically at you before kicking his feet out, laying back, and opening his arms for you to join him. You quickly climbed on top of him, and he tucked you in between the back of the sofa and his side, bending your knee so that your thigh rested on top of his, and pulled the blanket over the two of you.

You let out a shaky sigh and felt the first few tears fall from your eyes and onto Sirius’ chest.

“Uhm...” James said loudly, looking over to both Regulus and Remus cuddled in a large plush chair from his place on the loveseat with Lily like ‘are you seeing this right now?’. “I think you’ve got the wrong wizard there, L/N.” He said with a nervous laugh.

“No, she’s quite alright.” Sirius gritted back at him, looking far more severe than James thought the situation called for as he rubbed his hand consolingly up and down your arm. 

James looked to your boyfriends, his face clearly asking all the questions that his mouth wasn’t.

“He helps, sometimes.” Regulus admitted, not looking particularly happy that you chose his brother over him, but not nearly as murderous as James figured he might look if he’d found Lily snuggled up like that with some other bloke. And it appeared as though the look of heartbreak on Remus’ face was caused more by your current sorry state and less about your current cuddle partner.

“But...your brother?” James asked, still befuddled over this development. “Doesn’t she usually go to Junior for things like this?”

Sirius scoffed. “Junior’s solution to almost anything is fire or murder.”

“Or both.” You whimpered quietly, causing Sirius to tighten his arm around you and bring his other hand up to continue stroking your arm.

“Besides, Barty’s an only child.” Regulus said flippantly.

“What’s that got to do with it?” James asked, slightly offended at the insinuation that anything may be wrong with him on account of his only child-ness. 

Regulus’ irritable demeanor over Sirius usurping you was quickly replaced by a cocky smirk at getting under James’ skin.

“Let me ask you this, Potter: last summer when Lily returned your letters unopened and called you an arrogant toerag after saying she’d rather date the giant squid, whose arms did you cry into?”

“He didn’t cry.” Lily laughed at the same time as James answered “Sirius’” without any hesitation.

“What?” Lily asked, looking slightly horrified that she may have actually hurt James’ feelings.

“Oh, all the time, every time, actually.” James said readily. 

“He got snot on so many of my favourite band-tee’s, Red. As a matter of fact, I expect retribution.” Sirius commented.

“And why do you think you cried into Sirius’ arms?” Regulus continued.

“Well...because he’s my best mate.” James said simply.

“You may think that’s the reason, but you’re wrong. It’s because Sirius is an older brother.”

James scoffed at that. “Please, that has nothing to do with it!”

“Have you ever cried in Remus’ arms?”

“No, but-”

“Pettigrew’s?”

James grimaced but answered honestly. “No.”

“No. Because they’re not older brothers.” Regulus said definitively.

“That actually makes sense...” Lily mused aloud. 

“You say that like you’re surprised, Evans. I know you’re not used to good idea’s coming out of men’s mouths, but I do assure you it happens more frequently than you might imagine.” Regulus taunted, earning him a pillow being hurled at his head. 

Much to James’ chagrin, his seeker reflexes caught the pillow before it made impact with his face. 

“Tosser.” James grumbled. 

“Would you guys shut up.” Sirius whispered, causing everyone to look over at you. 

Regulus couldn’t even find it in him to be miffed when he saw you sleeping what looked to be quite peacefully in Sirius’ arms. Your eyes were slightly swollen from your tears, and he could see the tracks they had left on your cheeks and over the bridge of your nose, but you looked so content. 

“So... all big brothers know how to do that?” James asked incredulously.

“I doubt it.” Sirius commented quietly.

“Only ones who know what it’s like to live in a Pureblood hellscape and needed to share his bed with his younger brother who was too scared to sleep on his own for years.” Regulus added quietly, staring unseeingly towards you and Sirius. Remus pulled Regulus tighter into his side and began rubbing his arm consolingly.

Suddenly, things started to make a little more sense to James. 

“I’ll write to mum.” James stated, causing both brothers, Lily, and Remus to look at him bemusedly.

“About what?” Remus asked finally.

“Y/N staying with us.” James said simply.

Regulus opened his mouth ready to argue; to argue that James didn’t have to and that he already took in both Sirius and Regulus. James didn’t owe Regulus anything. 

But Sirius spoke first.

“She should be with her big brother, Reggie.” Sirius said, shooting him an encouraging smile and wink.

And seeing how your breathing had fallen even with your mouth slightly ajar as you clutched to the fabric of Sirius’ jumper like it was a lifeline, who was Regulus to argue?

[daddiesdrarryy]

James: It’s sweet that you care about Pads so much, Reggie

Regulus: I do. He’s my brother. And I wouldn’t be able to forgive myself if something happened to him and I wasn’t at his bedside to say “I told you so”

[chacharealsmoothwithme]

sibiling things that happened between sirius and regulus as children

-sirius and reg used to play ninjas. when sirius was 13 and regulus was twelve, he bought a katana, it wasn't sharp but it was still metal. One day they were play-swordfighiting and regulus blocked a hit (from the blunt katana). he started bleeding so much while sirius was just begging him not to tell mum because they'd be in so mich trouble. Regulus never said anything but still has a visible white scar on his palm

-regulus used to take sirius in rooms then turn the light off,run away and lock him inside

-sirius once hid in Regulus' closet for hours after dinner only to jump out ON him hissing and pretending to be a monster

-regulus used to pretend to go crazy and start chasing sirius telling him quite violent and scary things, chasing him with a kitchen knife. it happened more often than you'd think. (there was one time when after they finished running and sirius had locked himself away from reg and made him stop playing because it was scary. when sirius got out and they went on the couch they realised that their parents and some.family friends were in the other room and had heard all the screaming)

-regulus once but sirius so hard and for so long he accidentally gave him a hickey

[impishtubist]

Fic where Sirius gets his freedom post-POA and Remus continues teaching at Hogwarts, and then one year Sirius knocks Remus up, and instead of his students being excited about it, everyone gets so mad because now their best/favorite teacher is going to be out of commission! At exam time too! And then he’s going to take leave and they’re going to have to deal with a new DADA professor! 

Many angry letters are written to Sirius bemoaning his bad timing. Hermione refuses to speak to him for months. 

[englishboylover]

barty : actually-

sirius : no one wants you hear your opinion, shut up.

regulus : you made him cry, AGAIN!

[godofstory]

Sirius: Reggie, what did Barty have that attracted you?

Regulus: oh so many things; his mind, his crazyness, and specially his body

Sirius: REALLY?

Barty: relax; we're the same blood type. he knew he could harvest an organ

Regulus: :)

[thelionsstar]

10 year old Regulus: mother said we’re not to cry

11 year old Sirius: that’s because mother is incapable of human emotions, you’re 10, cry if you feel like it

[punkharryp0tt3r]

Sirius, stepping into Regulus’ room: Uhm hey

Regulus: What the hell are you doing

Sirius: Uhm- I got you something.

Regulus, giving Sirius a death glare: What is it.

Sirius, pulling out a dog plushie, handing it to Regulus: I thought you would like it-

Regulus, staring at the plushie in his hand, tears in his eyes: What the-

Sirius, thinking Regulus was mad: I know it’s stupid- I just- are..are you crying..?

Regulus, wiping away tears, sniffing: I’m not crying- your crying..

[avalon-but-evil]

Capt. Sirius Oculus and his unfunky brother

[moonstruckme]

Oooo darling!! Your latest TASM fic sparked and idea!

(Before that, hello lovely 🩷 i hope you're having the best spooky season!)

Big brother!Sirius coming to save some poor sod that upset his slytherin!sister (Regulus' twin). So you have the charming & fun Sirius; quiet & regal Regulus; loyal & volatile reader. And i imagine Sirius calls them his twin stars (because hes deffinately a huge sap).

Where wolfstar is in 7th year and has a great relationship with the twins (maybe theyre trying to become their legal guardians behind the scenes). He and Remus are in their dorm before Peter bursts in, breathless, only saying "y/n" before Sirius is off. He has no doubt to why you were put in 🐍, and god forbid someone actually hurt his baby sister.

On reader's side, someone made a snide comment about Remmy being a halfblood or ruining the Black legacy or something and reader gets pissed because shes actually quite fond of him.

Then whatever you decide love; maybe reader gets hurt; maybe she does the hurting; maybe Remus saves the day with his long legs; or Sirius might show people what growing up in the 'Noble house of Black' does to someone. And idk what Reggie is doing, i imagine he was making out with James and they come in at the last minute ("😱 james!! What have you done!? Youve DEFILED one of my precious stars!!! Let go of him!!!! NO, dont touch him, get away.")

Anyway bub, as always; dont feel pressured and take all the creative liberties youd like!! Love you lots darling x

Hi my lovely, thanks for requesting! I really need to get more creative than bloody noses but ugh they're just so classic

cw: blood

big brother!sirius + (as opposed to x, I guess?) little sister!reader ♡ 861 words

“You weren’t there!” you insist as Sirius stalks back and forth across the room, tapping his wand against his leg in a quick, restless beat. “He said—he—” You look at Remus, the boy’s eyebrows drawn together in concentration and concern as he presses a cloth under your nose, trying to stop the blood that’s already crusted down your chin. You decide to keep your mouth shut. 

Remus smiles wryly, and you know he suspects why you’ve chosen to go quiet. “It doesn’t matter what they said, love. I don’t need you getting in fights for me.”

“Who was it?” Sirius demands, for probably the fourth or fifth time. You’re losing count. 

“It’s already been hand—ah!” Remus murmurs an episky while you’re distracted, and you flinch, hands flying to your face as your septum snaps back into its proper place. “Fuck, could’a given me some warning.” 

“Sorry,” Remus says, and he looks like he means it, tilting your chin up to continue cleaning your face as you look at him with teary eyes. “Thought it might hurt less if you weren’t expecting it.” 

“How do you figure?” you ask him, somewhat miffed. 

“Back. On. Task.” Sirius claps his hands with each word, coming to a stop in front of you. “Who did this? Remus is my boyfriend, I have twice as much a right to defend his honor as you do, you—you fucking—squirt.” 

You sneer at the childish name, but you know your brother means to rile you. “I told you, I handled it. He won’t do it again.” 

“And he’s never going to touch you again either,” Sirius promises menacingly, squatting in front of you to look you in the eyes, “if you just tell me the fucker’s name.” 

“Alright, that’s enough,” Remus says, taking his boyfriend’s shoulder in a spindly hand, the touch both soothing and controlling as he pushes Sirius back from you. “Let’s just let her rest for a minute, yeah?” Sirius sputters in protest, but Remus moves in front of him, pressing his face into his boyfriends’ dark locks. You roll your eyes at the display, though a tiny part of you loves that your brother has someone who loves him this well. Once he quiets, Remus speaks in a low, soothing voice. “I know, I know, you won’t be deterred from your vengeance, but there’s time for that later. Let’s just calm down for now.” 

It’s a lovely prospect, but at that moment, the door opens to reveal Regulus and James, both looking somewhat ruffled. James stops short at seeing you all gathered in his dorm (Remus and Sirius, of course, have every right to be here, but you’d bet he and Reg were hoping for some privacy) and stands there blinking for a moment. Your twin’s blasé facade slips the moment he sees you with blood still crusted to your nostrils and tear tracks down your face. 

“What happened?” he asks, pushing past James and into the dorm. 

“She got into a fight,” Sirius says, outrage instantly rekindled, and Remus sighs in exasperated resignation, his work undone. “Someone said something about Moony, but she won’t tell who.” 

Now James looks upset too, eyes darting to Remus concernedly. “About Moony? When?” 

“Just now!” Sirius throws up his hands. “Ten minutes ago! Did either of you see anything?” 

James shakes his head, and despite Regulus’ blank expression, you catch the embarrassed shifting of his stance. “No,” James says, “we were, uh…we didn’t see anything.” 

“I bet I know who it was though,” Regulus offers, that traitorous scum. He’s just throwing you under the bus to take the heat off himself. 

It works; Sirius perks up. “Yeah? Who?”

“It doesn’t matter who,” you say, but Sirius cuts you off, facing your twin. 

“Who?” he asks. 

“It was the guy you were arguing with yesterday too, right?” Reg glances at you for confirmation, and you glare at him. Don’t you dare, your look says, but he nods and turns back to Sirius. “He’s your year, the one you guys call Sni—”

“Reg and James were coming in here to have sex!” you blurt. 

It’s a wonder Sirius doesn’t get whiplash from how fast he turns around. “What?” 

You nod, unable to feel guilty as Regulus gives you an appalled look from behind your older brother. “Mhm,” you say. “Their hair is all messed up, and look—their lips are swollen. Plus, they were surprised we were in here.” 

You do feel a tiny bit bad for James, whose dark skin blanches when Sirius turns on him. “James Potter, did you come in here to defile my brother?” 

James looks to Remus for help, but his friend only turns his palms up like Sorry, what can you do?. After a second, Regulus steps closer to him.

“Sirius, we—”

“Don’t touch him,” Sirius practically retches. He shakes his head, grabbing Regulus by the arm and all but dragging him from the room. “Alright, listen. You are going to tell me who was talking shit about Remus, and then we’re going to have an entirely separate conversation about boundaries.” He casts a noxious look back at James. “And I’ll deal with you later!” 

[maliefizz]

Just a few of my favorite Regulus/James and/or Remus/Sirius fics.

Everything from Zeppazariel really.

[startledstoat]

Hc where Sirius signed every letter S.O.B. and he convinced little Reggie to start signing his stuff R.A.B. so that Sirius could deny that he was doing it just to be a little shit and then Reg never broke the habit

Or

He did start signing stuff Regulus Black once he and Sirius no longer got along and the letter to voldy was not only the last thing he signed ever but also the first thing he'd signed R.A.B. in years

(I swear this was supposed to be fucking funny but I can never let myself stay happy when it comes to the Black brothers)

[matiisnottrash]

"Feels like we had matching wounds, But mine's still black and bruised, And yours is perfectly fine now. . ."

I honestly cant find a happy song for them yet but ANYWAY, here Sirius and Reggie (i headcanon that is a black cat ok?) in his animagus form doing silly things

[lilyystarr]

black brothers where sirius likes to be babied by his friends and regulus who hates to be babied but only lets sirius baby him