Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/4666275.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      Harry_Potter_-_J._K._Rowling
  Relationship:
      Sirius_Black/Remus_Lupin
  Character:
      Sirius_Black, Remus_Lupin, James_Potter
  Additional Tags:
      Marauders'_Era, Mildly_Dubious_Consent, Hogwarts, Hogwarts_Sixth_Year
  Stats:
      Published: 2015-08-27 Completed: 2015-08-29 Chapters: 3/3 Words: 4022
****** Sirius Black Gets A New Mate (Not the Friend Kind) ******
by iLoveSourWorms
Summary
     When Remus and Sirius get trapped in a small room inside of the
     castle overnight, secrets come out, as do they.
Notes
     Hello! This is the first part in a series I am planning on writing.
     This particular story is MWPP era and can be considered the Remus and
     Sirius get together fic.
     Feel free to check out my tumblr at stevexbuckyinlove, it's mainly
     stucky but I'm starting to post more and more wolfstar in addition to
     my other ships.
     All characters belong to JK Rowling and her beautiful mind!
     UPDATE: I am looking for a beta! If anyone is willing to do that and
     help me out it'd be excellent! I'm 11,000 words into part two in the
     series and that in a WIP. Message me if you're interested!
***** Stupid, Spying Snivellus *****
It was the coldest day Hogwarts had seen in over 45 years. Students were given
the day off from their lessons, as Professor Dumbledore had logically decided
that they'd struggle to work in the bitter cold of the dungeons.
So that is how Sirius Black and Remus Lupin, animagus and werewolf -
respectively - found themselves below the grounds of the castle sneaking about.
The two boys, both in their sixth year, were taking full advantage of their day
off to explore the uncharted territory inside and around the old building.
The pair were initially invited to spend the day with their fellow Marauders,
however when James and Peter described their boring plan of heading into
Hogsmeade for a Butterbeer and a trip to Zonko's, Sirius and Remus 'politely'
declined in favour of their own adventure. 
 
~
 
"But Sirius! We always have a brill day when we sneak out to Hogsmeade! We can
go into the Three Broomsticks! If you smile and flirt with Helga for a little
bit, she'll probably even give us some firewhiskey!" James pleaded with his
friend, even getting down on his knees and tugging on his robes.
"Not today Messr Prongs! Alas, I want to do something different today, I want
to do something exciting." Sirius stood back from his friend, which in turn
caused James to collapse to the ground with an exaggerated cry.
"Padfoooooooooot, pleeeeeease." James had now resorted to press his hands
together as though he was praying, shaking them desperately at Sirius.
"Come off it Prongs! We can go to Hogsmeade. If Padfoot doesn't want to come
with us that's fine, we can go by ourselves." Peter had ended up hauling James
to his feet, dusting off his snow covered robes.
"You know what Wormtail? That's a brilliant idea, you and Prongs can go to
Hogsmeade, and I'll stay here with Padfoot." Remus clapped his hand over
Peter's shoulder, practically pushing them away. "Have a great day guys! We'll
see you later!" Remus grabbed Sirius at the elbow and dragged him in the
opposite direction, his heart hammering excitedly at the thought of a day spent
alone with Sirius.
 
~
 
Everything was going fine in the boys exploring, that was until they heard a
large wooden door - the same one they'd walked into only moments before - slam
shut. Remus looked towards Sirius, his eye wild with fear of getting caught.
They immediately began running towards the end of the large hall, hoping to
avoid being seen by whoever was pursuing them. A small room appeared to the
left of where the boys were running, and by Merlin's graces, the door was open.
Just as the boys slipped inside the room, they felt a small tugging sensation
from inside of their robes. Just as they turned to close the door they saw a
smirking Severus Snape standing at the end of the hall.
"How do I always end up letting you talk me into these things Padfoot!" Remus
whisper-yelled towards the other boy.
"It's hardly my fault my dearest Moony, if stupid Snivellus hadn't decided to
come storming down the stairwell after us, we wouldn't be in this mess!" Sirius
bickered. Both of the boys stopped talking and held their breaths when the
footsteps outside of the room stopped.
"Colloportus"Both of the boys looked towards each other, now they were locked
alone in the room together.
"Snivellus! Let us out you oily haired git! I'll bloody get you, you great big
stomping baboon!" Sirius had resorted to throwing a variety of colourful
insults towards the Slytherin.
"I'll be back tomorrow morning before breakfast, I would just leave you here
but I doubt Dumbledore would be very impressed if I left the pair of you to
starve. Maybe this will teach you to never threaten me again." Snape answered
monotonously.
"You're a great, stinking sod! You do realise I can just use a counter-spell?
Bloody prat!" Sirius was now yelling at Snape through the door, Remus went to
retrieve his wand from inside of his robes, it was then that he realised his
wand wasn't there.
"Uh, Siriu..."
"You listen to me you idiot, I'm just grabbing my wand right now, in about
three seconds I'll...". Sirius' voice died off into nothing when his hand came
from his robes, it seemed he was also without his wand.
"So sorry to leave you without your wand Black, you'll have it back tomorrow."
Snape sounded pleased with himself as he began to walk away.
"How in Merlin's fucking name did he get our wands!?" Sirius screeched. "I'm
going to kill that bloody fool, you just wait."
"Pads, calm down."
"I mean it Moony, I'm going to kill him, I might just hang him from the bloody
Astronomy Tower and let him freeze! Who does he think he is? Locking us in here
like that." Sirius was fuming. If Remus was going to be honest, there was
something about Sirius' unadulterated rage that made him even more attractive,
the Black temper was famous amongst wizards and it was in moments like this the
young werewolf could see why.
Sirius seemed to have tired himself out soon though and before he knew it, the
dark haired wizard was sliding down the wall and sat on the floor.
"At least we had a big lunch?" Remus spoke quietly, attempting to remain
optimistic. Sirius snorted in response. "Maybe Prongs and Wormtail will come
find us tonight? I mean, when we don't come back they'll obviously look for
us." Sirius huffed.
Remus found himself sliding down the wall next to his friend, he figured if
they were going to be here for a long time, he may as well not wear himself
out. Sirius rested his head on the other boy's shoulder instantly, snuggling
his head into Resmus' neck. The werewolf instantly found his heartbeat
fluttering so loud he could hear it, Remus was pretty sure Sirius would be able
to hear it too. When Remus began trying to move Sirius away from his neck, an
arm reached out of nowhere and wrapped around his middle.
"Sirius?" The young werewolf peeked out of the corner of his eye, only to see
his companion asleep. Remus decided that he'd may as well go to sleep too,
seeing as they were going to be there for a long time.
Sirius snuffled quietly in his sleep, and Remus found himself drifting into
unconsciousness. 
***** A Delicate Situation *****
Chapter Summary
     Sirius wakes up to something different, this is how he reacts.
Chapter Notes
     Thank you for sticking with it! I know I said that there was only
     going to be two parts, but I got a little carried away and this has
     now grown a bit more than planned, there should only be one more
     chapter. This chapter is what I consider to be explicit and there is
     also a teeny bit of dub-con if you look. Once again constructive
     criticism is welcomed and all characters belong to the marvellous JK
     Rowling!
Sirius slowly became more and more aware of his surroundings. The first thing
that he noticed;It was really fucking cold. The second, and much more
distracting thing the first, was the robe covered arm currently wrapped around
his middle, as well as his and Remus' entwined legs. REMUS! The legs and arms
belonged to none other than Remus fucking Lupin. As Sirius gained even more
lucidity, he noticed Remus was slowly rocking into the cleft of Sirius' ass.
"Uh, Moony? Are you awake back there Moony?" Sirius turned his head over his
shoulder, and what he saw amazed him. Remus, his best friend in the entire
world - save James of course, though he was more of a brother to Sirius - was a
sight to behold. Remus' eyes were closed, his eyelashes casting soft shadows
over his cheeks. Remus' mouth was opened slightly, and he was huffing out small
breaths.
Suddenly, the arm around Sirius' waist moved, the werewolf's hand grabbing his
companion tight at the hip and pushing him onto his stomach. Remus let out a
soft growl and begin furiously thrusting against the wizard.
This wasn't to say that Sirius wasn't enjoying every second of it, as Remus
continued with his ministrations Sirius lay beneath him, achingly hard.
"Wait, Remus! Wake up!" Sirius cried out urgently, as much as he was enjoying
himself, Sirius feared that Remus had no idea what he was doing.
As the thrusting stuttered, the hand on Sirius' waist eased the pressure and
Remus immediately moved away from his friend and jumped to his feet.
"Pad...Padfoot?" Remus called out quietly. Sirius allowed himself a moment to
compose his mentality, as well as tactfully rearrange his robes as to not show
off his blatantly obvious erection.
"Are you with me again Moony?" Sirius tried quietly, his friend looked up at
him through his eyelashes.
"I... I'm so sorry Pads, I didn't know what I was doing. If I'd have had any
clue that it wasn't a dream, I would've stopped instantly." Sirius frowned at
this statement, he'd just assumed that Remus' body had enjoyed being pressed so
close up against his ass, which despite being extremely  masculine in all
respects, had confused his poor friend into thinking he was a lady-friend and
led him to molest Sirius in his sleep.
"Are you saying you knew it was me?"
"I really am sorry Pads, I di... Uh, what?" Remus shifted nervously on his
feet.
"What you just said, that you didn't know you weren't dreaming? Were you
telling me you thought you were dreaming, about me, and then decided that it'd
be a good idea to start trying to do me in your dream?" The Black heir looked
up at his friend, a grin slowly spreading over his face.
"Shut up, Padfoot." Sirius couldn't help it, he cackled. Poor Moony dropped
himself miserably to the floor, painfully obvious boner in plain view of
Sirius' searching gaze. When Sirius realised that his friend wasn't laughing
along as well, he crawled over next to Remus and grabbed his hand.
"There's something I need to tell you Sirius." Remus looked at his friend,
staring dead on into his grey eyes. The seriousness of the situation
intensified by the use of his real name.
"You can tell me anything Moony, you know that."
"Well, it's uh... A delicate situation."
"Continue."
"Sirius, I... I don't know why, but I... I'm attracted to you, a lot. I didn't
want to say anything but I like you." Remus mumbled quietly. Sirius' eyebrows
shot up to his hairline, and in an attempt to keep himself from screaming with
joy, he let out a weird, almost pained whine.
"Holy fuck." Sirius winced at the bluntness of his response. After imagining
this very moment for the past two years, you'd think he could come up with
something with a bit more tact.
"I'm sorry, I shouldn't have said anything, I just... You're my best friend and
I needed you to kn..." Remus didn't even get to finish what he was trying to
say, because before he finished that sentence, there were a pair of lips
pressed firmly against his.
"Padfoot? What're doing?" Remus murmured against his best friends lips.
"Moony? Shut your god damned mouth and kiss me."
And with that Sirius pushed back onto Remus' mouth, pressing his tongue against
the tongue of his partner. Sirius was feeling bold tonight, this was evident
with the way he was dominating Remus, pushing him against the wall, the dark
haired wizard bit his counterpart's lip.
Sirius pulled back for air, and as he looked at the face of his friend, he
noticed his eyes were glowing. This was something that only happened on the
full moon. "Moony, your eyes are glowing." Sirius breathed out quietly. He
loved his best friend, more than anything else, and seeing him like this was
the best thing that had ever happened to him.
Remus was strong, and used this strength against Sirius. Putting his hands at
his waist, Remus gripped tightly to his friend and used excessive force to
press him against the wall. The light haired teen continued to ravish the
other's mouth, and was now grinding rapidly into Sirius' hip.
Remus felt Sirius' erection pressing into him, and this made it almost
impossible to control himself. Remus took off his robes, and Sirius followed
soon after. The pair continued to strip until they were left in nothing but
their underwear. Remus dropped to his knees and mouthed at Sirius' cock through
his underwear, the dark haired teen calling out in pleasure.
"Just take them the fuck off Lupin, or I swear to Merlin I'll do it myself."
Remus didn't even have the control to take off Sirius' underwear like a human,
instead grabbing them at the side and ripping them open. Remus took Sirius'
length into his mouth and began sucking, swirling his tongue across the tip
where the gathering liquid pooled into his mouth.
"Remus! Stop! If you don't stop I'm going to...nuughhhhhh". Whatever Sirius was
trying to say was lost in the frenzy of teenage hormones, Remus letting off
with a noisy pop.
The taller of the two wiped his mouth with the back of his hand, and began to
pump Sirius in earnest.
"I want you to fuck me." Sirius looked down on his friend, completely
deadpanned and sweating.
"Sirius, I can't do that."
"Why the fuck not?" Sirius looked at Remus, clearly annoyed.
"It's too hard to explain." Remus tried to lose the conversation by putting his
mouth back on Sirius' throbbing cock, but Sirius wouldn't allow it.
"I mean it Moony, I want you to fuck me, right now."
"Sirius, I can't. Please just leave it at that."
"Why can't you fuck me? Is it because of what you are? You know I don't have a
problem with that Moony." Remus looked grief-stricken at his friend, and with a
stony expression moved away from Sirius.
"I don't see why you can't fuck me. Is it because you're a virgin? Because I'm
a...."
"It has nothing to do with my virginity Sirius, for fuck's sake! Just leave it
alone!"
"You like me don't you?" By now Sirius was going soft, his dick below half
mast.
"Padfoot, I like you alot more than you realise. That's why I can't."
"That makes no sense."
"It's because, me being what I am, if I am with someone who I have
feelings for, the wolf sees them as their mate." Remus started quietly. "I
can't sleep with you, because then it will only be you, for the rest of my
life."
"So you don't want me?" Sirius queried quietly.
"That's not it at all Sirius, I want you. I'd happily have you for the rest of
my life."
"Then what's the problem?"
"I don't want that for you. You shouldn't have to spend the rest of your life
having your heart and body only being shared by one other person, and that
person being a beast." Remus replied, his monotonous voice indicated no
emotion, but Sirius didn't need to hear his emotions, he could see them in his
eyes.
"Moony, I like you, I always will. I have for a very long time and I doubt
that's going to change." The sincerity in Sirius' tone was overwhelming Remus,
who at last, had lost his will to resist Sirius.
"Okay."
***** Chapter 3 *****
Chapter Summary
     "Okay."
     This one word was enough to make Sirius shiver in anticipation. As
     the dark hared boy looked in to the eyes of his friend, he saw
     something there that wasn't completely human. It was the wolf, wild
     and volatile, Remus was obviously having trouble maintaining the
     small shred of control he had.
Chapter Notes
     Okay! Here it is, the final chapter! Thank you everyone for reading/
     commenting/leaving kudos! I appreciate all the support!
     Please let me know your thoughts below, and anything you liked/
     disliked about it and how I could improve my writing and/or the
     story!
     Speaking of which, do you guys think I should make a sequel? I am
     planning on it, but depending on whether people enjoyed this will
     influence my choice, thanks! :)
Chapter Three
"Okay."
This one word was enough to make Sirius shiver in anticipation. As the dark
hared boy looked in to the eyes of his friend, he saw something there that
wasn't completely human. It was the wolf, wild and volatile, Remus was
obviously having trouble maintaining the small shred of control he had.
"You have to promise me though Sirius, you need to be sure."
"I've never been more sure of anything in my life." And this is true, Sirius,
who was sure of nearly everything, but never of anything as much as this.
Sirius gave Remus a curt nod, and once again Sirius' lips were covered by his
friends. This time, it was much gentler than before. Remus laid Sirius gently
to the floor, almost as though he was some virginal maiden. "You don't need to
be so gentle Remus, I'm not a girl." Remus' reply to this was to suck lightly
on Sirius' neck.
Sirius gripped on to Remus' naked back, feeling his muscles shifting beneath
his fingers. Remus began to kiss down Sirius' chest, around his nipple all
while giving his ass a soft squeeze. Sirius moaned at the touch, hands curling
into Remus' soft, light coloured hair.
"Ugh, Moony... What're you doing to me?"
"I could ask you the same thing, Pads."
Remus continued to stimulate all parts of Sirius' body, paying attention to
every detail. Sirius was running his hands over every available surface to his
love's skin, memorising every scar, every freckle and mole.
Remus started into Sirius grey eyes, and never in his life had he seen so much
emotion conveyed in the boys eyes. Love, happiness, worry and even fear.
"You're not afraid of me, are you?" Remus asked shyly, which probably seemed
ridiculous seeing as they're literally lying against each other, completely
starkers.
"I could never be afraid of you, Rem."
The use of the nickname made Remus' heart soar, and he felt his wolf sigh
contentedly within himself, obviously pleased Remus' choice of a mate.
Well I'd bloody hope it would, seeing as it was the wolf's stupid fascination
with the young man that drew him to Sirius in the first place.
Now that both of the teenagers had removed all of their clothing - including
socks - they began to explore each other in ways they hadn't had the chance to
before. Sirius particularly loved Remus' back, he loved feeling the strength in
his shoulder blades. Remus loved kissing all parts of Sirius' chest, which he
did for what seemed like hours.
Finally, Remus got to the point where he was hard as a rock, and hardly able to
with-hold himself any longer, he looked Sirius deep into his eyes, "Are you
ready?"
Sirius let out a determined nod, and Remus sat up, grabbed Sirius under his
legs, and lifted his ass into the air. For a second Sirius' heart beat sped up
and his muscles tensed, Remus knew those were tell-tale signs of fear.
"Sirius, please. If you're afraid tell me. We don't need to do this."
"I'm not afraid."
"Don't lie to me Sirius, I can sense it."
"I'm not afraid of you Remus." Sirius rolled his eyes and put his arm across
his face. "I'm nervous that's all. It's not every day you lose your virginity
and I'm just ner..."
"You're a virgin?" Remus interrupted.
Sirius glanced up at his partner, furious glint in his eye. "So fucking what?
I'm a 17 year old virgin, who cares? Is that going to be a problem now? You
don't want to fuck a virgin, are we too emotional?" Remus was astounded at the
reaction he got from Sirius.
"No, you bloody git. I just didn't know, there was always those girls, every
week you had a different one. How was I supposed to know any different?"
"I never slept with one, I got close with a few, but every time I nearly did I
couldn't help but think is she the one? I know it sounds ridiculous, but I
wanted it to be special. I couldn't do it." Sirius almost looked ashamed to
admit that fact. Remus considered him for a moment.
"I'm glad nobody ever laid a hand on you."
Sirius' heart leapt into his throat at that statement. A smile played at the
boys lips, slightly shy at the impending act, slightly smug about the effect he
was having on Remus, yet despite all of this, his mate's smile was 100% Sirius
Black.
Remus gave one more look up at Sirius' face, as if for confirmation. Whatever
he saw there must've answered whatever Remus was asking, because within ten
seconds he had Sirius lying on his back and a finger soaking wet and buried two
knuckles deep inside of the young man.
Sirius was so obviously unfamiliar with the feeling, he began to tense his
muscles. This made it incredibly hard to add another finger, so Remus had to
kiss the stress out of Sirius until he was calm enough to be stretched a bit
further.
"Come on Pads, not much more now." Remus whispered into Sirius' ear, pressing
soft kisses into the other's temple.
The two fingers were now moving at a constant pace inside Sirius, Remus
occasionally bending his fingers in just the right place, rubbing against
Sirius' prostate and causing him to call out. Remus added a third finger,
continuing to pump them slowly into Sirius.
"If you don't do something soon Moony, I swear I'm going to kill you."
Remus took this as an indication that Sirius was ready. He carefully removed
his fingers, and spitting on his palm he stroked his length enough times to
cover it. Pressing a kiss to Sirius' collar bone, he began to slowly push past
the tight ring of muscle. Sirius let out a broken and breathy gasp, whether
from pleasure, pain or a mixture of both, Remus was unsure.
"Are you okay?" Sirius' eyes were closed tightly, rather than saying anything
in response, he simply nodded his head. When Remus finally bottomed out, he sat
still for  moment, allowing Sirius to grow accustomed to the feeling.
"Can I move?"
"Slowly, just go slow... please." Remus did what Sirius asked, thrusting
shallowly and at a painfully slow pace. Before long, however, Sirius began to
react to Remus, his enjoyment and comfort obviously improving. The black haired
teen began to meet Remus thrust for thrust, and when Remus touched against
Sirius' prostate, he released an incredibly loud moan.
"Do that again Moony, or so help me..."
Remus did as best as he could to follow through, thrusting as deep as possible
inside of his friend, and seeing that Sirius' cock was back to full mast and
begging for attention, he wrapped a fist firmly around the length, pumping up
and down in time with his movements.
The two boys, so overwhelmed by their ministrations, lasted no more than a
minute after that, both getting their release within five seconds of each
other. Completely exhausted, Remus pulled himself  out of Sirius, and rolled
onto his back next to his mate. Sirius turned Remus onto his other side to face
the wall, and began to spoon him.
"Why do you get to be the big spoon? I'm taller."
"I like your back." Remus turned his head at Sirius, and smiled fondly. The
boys wrapped themselves up in each other, and fell asleep.
 
~
 
James was sure his friends were down here. Everywhere else he'd looked, they
were nowhere to be seen. He'd known Sirius wanted to explore the vast area
below the castle, accessible through the tunnel and large wooden door hidden in
the forbidden forest. It was the only place inside of the old castle where they
hadn't yet ventured, and James suspected his best friend was going to go ahead
and do it without him.
As James arrived at the large wooden door, he muttered a quiet unlocking charm,
the heavy door opening and allowing him inside.
As he stepped over the entry way, he stared around him in amazement. A large
hall, even larger than the great hall, greeted him. As he began to walk down
towards the end of the room, looking for any evidence of Sirius, the torches
lit up one by one when he walked past them.
Once James had reached the end of the magnificent space, a small door appeared
to him. Would Sirius be in there?When James unlocked the door, the sight he
witnessed was the last thing he expected.
There was Sirius, sleeping, naked and lying on the floor, wrapped around an
equally naked and sleeping Remus. James let out a yelp, and woke both of the
boys.
"James? James! What are you doing here!?" Sirius cried in a rush.
All three boys were intensely staring at one another, and surprising everyone -
including himself - James broke into a laughing fit.
"I knew it!" James continued to laugh exasperatedly, all the while Sirius and
Remus sharing equally confused looks. "Alright mates, I'm going to leave you to
get back in your pants. Hurry up now, breakfast starts in half an hour!" James
shook his head to himself and practically skipped out of the vast and spacious
hall. "Your wand are out here by the way, feel free to grab them when you
leave!"
 
Fin
 
~
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