Work Text:
His mother had been harsh when she and his father picked them up from the station, when they’d arrived home she’d had him strip to his boxers and proceeded to pinch and poke and prod at every stretch-marked roll — Regulus knew he’d let himself go at school, he’d disappoint her again. At least his father hadn’t commented at all, Regulus wouldn’t survive the shame if his weight had gotten so bad as for him to intervene.
Sirius was the worst of them though, he couldn’t even look at Regulus. They hadn’t spoken a word since they’d come home, at least at Hogwarts it could be excused by their different years and different houses, even if Sirius had always found time before he had exams now, his school life must be too stressful to find time for his little brother. Every room Regulus entered Sirius left, they hadn’t shared meals together, the only hint of him Regulus had had was the screaming fights in the study between Sirius and their mother or the whispers he could hear through the door to Sirius’s room as he passed it on the way to bed.
Tonight the universe had conspired to punish him for his desperation for attention: every aunt, uncle and cousin was staring at him, at his robes as they stretched around him, buttons near puckering. Another few weeks and the extension charms wouldn’t work, the fabric would be stretched too thin. For now he’d managed to escape to catch some air, down some hallway of the near-decrepit castle they were being hosted in.
Candles lit the way but the roaring fire of the ballroom didn’t reach this far, he could feel the winter chill cool him down as it seeped through the thin windows and stone walls. The silence was bliss now, too, and he could finally attempt at calming himself.
At least he thought he could, but all he managed to salvage was a minute alone before the door to the ballroom opened again. His brother was barely able to walk, falling into the door as he turned to shut it behind himself. He held onto the wall as he stumbled towards Regulus, muttering under his breath all the way.
Sirius and their mother had argued again from what Regulus could gather, in public this time, and presumably something to do with the state his brother was currently in. Sirius caught sight of him after a few seconds and had decided now was the time he wanted to pay any attention to him.
“She’s a bitch,” he spat, attempting to straighten himself up, pointing behind himself at the door he’d just walked through before he tipped himself over backwards and almost fell to the floor. He managed to catch himself against the wall again before he tipped all the way over though, “she thinks she can tell what to do! Never, I’m a son of the most noble and ancient house of Black you know!”
He stuck his nose up and stomped his foot before hunching over himself laughing, stepping forwards and standing next to Regulus and wrapping him in a hug.
“I missed you,” Sirius slurred, his hand sliding down Regulus’s back and resting over his arse and squeezing, “you’ve grown so big.”
Regulus could feel his cheeks burning as his brother moved his other hand to the back of his head, pulling his hair back and kissing him. Regulus felt like he might gag at the taste of firewhisky. He tried to push Sirius away, he was definitely not in the mood for this right now, but his brother fought back, pushing him backwards into an alcove, the curtains shutting behind them.
“Need you ‘lu,” His brother slurred out, hunched over and biting at the small roll that had appeared under his chin a few weeks ago. A hand unbuttoned Regulus’s robes and slid under to grope at the doughy belly that hadn’t been there before summer. It’s all he could do not to burst into flames — Pray Merlin no one sees me like this, Regulus’s cheeks burned as the hand slid across sweat-slicked flesh, searching for more.
Regulus was going to respond before his brother, the pervert, pushed him back to the wall and pressed his clothed erection into his plush thigh, moaning as he sucked at Regulus’s neck.
Something twisted inside Regulus as he went through the motions — his robes coming apart as Sirius pulled his cock out, taking the kiss as Sirius pressed their lips together in a way Regulus knew would come out in bruises, took the slap to his ass that always came before Sirius pressed himself inside. The familiar feeling that reared its head whenever Sirius needed him, and following it came the shame of the thought. He was such a terrible brother to Sirius, he knew, because no one else could ever feel such a thing.
Regulus braced himself against the wall as best he could, but Sirius leaned over him to keep himself upright and forced Regulus face-to-stone. Every weak thrust pressed his face further, chubby cheek chafing against the coarse lime, forcing Regulus to bite his lip from shouting.
“Take it,” A sharp slap landed on his ass a the other large hand gripped onto the stretched skin of his side, the roll bruising under the pressure. Sirius tried again but the motion was unfocused(?) and he missed, catching himself before he could fall, but somehow facing himself further into Regulus and pushing regulus further into the wall. He could feel Sirius’s breath against his skin, smell the acrid stench of firewhisky on his breath, “you like this, don’t you, bitch?”
Regulus stood silent, tensing as Sirius bit his earlobe softly, his hand moving slowly, tracing a finger along the curve of his side, squeezing a plump tit, before wrapping around his throat. A soft squeeze forced a gasp out of him before Sirius shook him, his nose cracking against the wall. Regulus’s mind blanked, body functioning on autopilot as it had a thousand times before, the words forming without thought.
“Yes,” his voice was high as the hand squeezed down harder, “Yes sir.”
“Good.” Sirius grunted through grinding teeth, his hand loosened as he picked up his pace again, gasping and moaning and biting at his ear, “you like following orders don’t you, always listen to your betters.”
Regulus nodded, agreeing over and over at everything Sirius grunted at him, his own moans held back by the hand squeezing down on his throat — he could barely wheeze, the edges of his vision darkening and his legs going limp as he fought to stay conscious.
The hand moved before he passed out, coming to rest again on the roll at his side, Sirius’s other hand coming up to press against the wall as his pace slowed to a forceful grind, trying to reach deeper into him as his groans pitched into a desperate wheeze.
“Gonna… gonna…” Sirius whined, pounding into him again a final time, nearly sobbing, “Mummy…”
Sirius stood there for a few long seconds before he pulled out, stumbling back and resting against the other wall as Regulus collapsed to the floor. He could barely tie his robes back together as he turned and stumbled away, heading back towards the party and leaving Regulus, half naked, half frozen, in a heap on the floor.
His cheek was torn and swollen, his nose bleeding and his legs were numb, but at least the curtains were still closed and no one could see him.