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Why not me?

Summary:

It's the middle of the night at Hogwarts and Omega Sirius Black is bent over the arm of the couch in the empty common room by Alpha James Potter. Porn with a little plot. Trigger Warnings: Dark thoughts, Cruelty, Depression and very heavy angst. There is no HEA in this one. Written for week 2 of the Tainted & Taboo 2026 event for the Tainted Souls discord server.

Notes:

Written for week 2 of the Tainted & Taboo 2026 event for the Tainted Souls discord server. Prompt was Knotting.

(See the end of the work for more notes.)

Work Text:

 The gold hoop ring that wove through the thin flesh of her bellybutton kept catching in the coarse fabric of the couch in the common room. Her porcelain skin was yanked harshly with each movement, and even though it caused a quick flash of pain, Sirius didn’t even notice. She didn’t notice the way her ebony curls were tangled. Or the way her uniform skirt was so tightly bunched up around her waist, that the button on the side was leaving an impression on her skin. And she definitely did not notice the sticky sensation of sweat clinging to her semi nude skin. 

 

The only things Sirius Black did notice was the way her best friend’s cock felt inside of her hot velvety walls. She definitely noticed the sharp sting of the burn as his thick width stretched her. Her aristocratic and slender fingers scrambled to grip the couch cushion in front of her in order to brace herself from the hard slams from the hips currently slapping her arse cheeks. 

 

Growling, a low tenor vibration, rumbled from the chest and up into the throat of Prongs. From the way his fingers were currently gripping her hips, she fervently hoped that she would wear his bruises for days to come. As it was, she could already feel them forming. Five perfect finger impressions or each hip. Merlin, she may have to go get them tattooed onto her, masochist that she was. 

 

“Fuccccccck.” she mewled, her voice strained. She could feel the large knot that had started thickening at the base of his cock, and Dumbledore’s balls, she wanted it to be forced inside of her. She felt it every time his cock slammed inside, the bulbous base teasing her each time it connected with her hole but didn’t enter. Godric, she was a whore for Prongs’s knot. It was going to be a tight fit, it always was and the anticipation of the moment had her whining, loudly. 

 

James’s rhythm changed for a moment and before she could complain, he tipped her hips up, pulled back until just the very tip of his mushroom head was inside. And then he pulled her backwards while he brutally slammed himself back inside. The first slam inside, stars appeared in her eyes and she felt more than heard herself keen while her ears roared as if she was in a wind tunnel.  He must have lowered down a bit with his stance and with moving her hips up, he had made direct connection with that sweet spot inside of her that had her omega slick dripping out of her, down Prongs’s balls and down the back of her legs. 

 

She felt the slick pool at the top of her socks and turn cold and it made her shudder. 

 

She should probably be concerned that her shoes would be ruined or that someone might catch them. But she was pretty confident that her Muffliato spell would hold and Prong’s Notice Me Not spell had yet to fail them. Moony might be able to smell them even if he couldn’t hear or see them but as far as Pads knew, he and Marlene had prefect patrol tonight and even then, it was likely Remus had her in a similar position. As much as the two deny hooking up or being together, Siri has seen the map many times, and the map never lies. 

 

A hand suddenly yanked her head backwards, her ebony locks held in a tight grip.

 

“If you can think, Pads baby then I’m not fucking you good enough. And don’t deny it, I can hear the cogs spinning from here.” James’s voice growled gravely into her ear before he ran his tongue over the pierced lobe. 

 

Blunt teeth suddenly pressed against her swollen scent gland, a tease of marking her as his omega, his mate. Sirius knew he was being cruel, knew he had no intention of marking her as his no matter how much she had begged for it in the beginning. She knew James Potter better than anyone else in the world and while her Alpha best friend may love pressing her down on her stomach and fucking into her until his knot catches on every available surface he came across, she knew he was holding out hope Lily Evan would present as an Omega. 

 

He’d told her so while fucking her several times. James Potter and Sirius Black were best friends, two peas in a pod, the Sadist to her Masochist. 

 

Sirius Black absolutely bloody loathed Lily Evans and in moments where she lost control and the Black family madness crept in, she thought about making the little muggleborn disappear not before making her hurt the way Sirius did. With her gone, there would be nothing stopping Prong’s claiming her as his mate, his omega. 

 

Her little brother Regulus had also presented as an omega and he’d already been claimed by his Alpha Rabastan LeStrange. Anytime Reggie found himself within ear shot of his big sister, he’d taunted her cruelly about being a coveted omega and not one Alpha wanted her as his. He’d tell her she was damaged goods and even the base animal side of the Alphas knew it. The way he’d cruelly laugh along with his friends, had at first hurt Siri deeply. But eventually she accepted she deserved Reggie's hate and cruelty.  She’d hurt her brother deeply when she ran away to James’s house and left him behind to face their mothers abuse alone. She knew he was just saying things to make her hurt like he had but the barbs landed and sunk into her skin. 

 

It just combined with her daily thoughts of how her best friend, her soulmate, didn't even want to claim her. He was hoping to get a muggleborn over her. 

 

She would never be good enough for anyone, not her mother as Heir or daughter, not to her father who turned his back every time her mother broke her, not to the light side for she would always be a Black and not to her very best friend, James Potter. Even knowing all of that, she knew every time James wanted her, she’d eagerly give herself to him. Because having even a moment of James Potter’s attention was better than having none of it. 

 

She hadn’t responded to James’s accusation of thinking and in retaliation, James slowed the rhythm of his thrusts to a maddening slow pull and push, and those teeth pressed just a little harder against her scent gland. The pressure on the swollen gland made her body respond as if she was about to be claimed and the euphoric feelings flooded her veins and her magic surged.

 

She whimpered and the thick cloying scent of needy omega wanting to be bred, quickly filled the air along with another rather large amount of slick that coated them both again.

 

She heard the dark chuckle behind her and deep down, she knew she should not find that such a bloody turn on. She’d always been drawn to James’s cruel side. Being a child of the Black Family meant her magic was dark. Just because she chose to bring herself to the light side and defy her family didn’t erase her genetics and her magic seeking it’s mate with power that was almost identical to hers. 

 

Prongs slid his lips down to her shoulder, his wet tongue trailing along her flesh and he bit down. A shiver crawled up her spine and her flesh broke out in goosebumps, almost as if she’d just stepped into a freezer. Blunt teeth broke the skin, he was marking her, just not as his mate. A mark that said she had a lover, that she was temporary to an Alpha or Beta. 

 

A place holder until he found someone worthy of being his omega. 

 

It should make her want to howl in sadness and betrayal but instead, it made noises fall from her that told her best friend just how much she enjoyed the feel of his teeth in her flesh. 

 

James started fucking back into her again, this time hard enough the sound of flesh slapping together should wake up everyone in the dorms. Her eyes rolled back into her head and her lithe frame started to tremble violently. With her eyes closed, she didn’t see her breath appear as she moaned. She was close, so very close to tumbling head first over that blissful edge where she would fly for a bit and all of these negative thoughts would disappear.

 

Just as Prongs’s cock slammed hard into her bruised cunt and she felt that perfect bulbous knot start to stretch her tight walls, just as she tipped over that blissful edge, the scene suddenly melted away as if someone poured water over a painting. 

 

And then there was nothing but darkness.  

 

The trembling she’d felt while being fucked in reality was her shivering from the cold and damp that permeated her cell in Azkabhan. Leaning over the side of her dirty and rotting cot, Sirius gagged and heaved but nothing came up. It had been days since she’d last eaten.  Or was it weeks? The food they served in this hell on earth was less than edible and she only gave in when she was on the verge of dying.

 

Dying was a reward, a reprieve from the punishment she very rightly deserved. No, she would live so she could pay for being the reason her Alpha died.

 

The dementor was coming back towards her cell again, the dread and the frigid temperature they brought with their floating corpse, washed over her paper thin skin like a second blanket that she was twisted up in. 

 

It had been the same memory playing every time they came near her this week, secretly she thought they were perverts who had died a long time ago. And after a decade, she was having a hard time telling what was the real memory and what was twisted by the demontors. 

 

Had James been that cruel to her? She’d like to say no but after being mentally tortured by them as her worst memories, perhaps they were. 

 

She’s already lived through being knotted and fucked by James twice tonight and she didn’t have the strength to live through it again. Not tonight at any rate. Rolling from the cot, she landed on the disgusting and spoiled ground with a hard thud. Wheezing in pain, she rolled over and shifted into her animagus form. 

 

Padfoot was emaciated, grimy and she stunk but this form was better. Less human thoughts the longer she stayed in this form and the Dementors couldn’t affect an animal. She slunk back into a dark corner so the guards couldn’t see her and slap her with an anti animagus bracelet. 

 

She dropped onto her belly and ignored the way the fridge coldness of the floor seeped through her thick black fur. Resting her head on her two front paws, her gold eyes tracked the shadow on the floor of the dementor as it came back to her cell. The floating tattered robe stopped at her cell and she knew it was scanning for her. When it didn’t register a human, it turned and headed down the row towards the back of them. As it disappeared from sight and the feel of dread started to fade, she heard the crazed cackle of her cousin Bellatrix. 

 

Curling up into a ball, she tucked her nose into her tail, she blended into the darkness and buried her snout into her grimy matted fur. She was the reason Prong’s had died, she’d killed him and, she deserved to be here, deserved the reminder that she was never good enough. 

 

As she drifted off, even though she accepted she deserved everything she was getting, a small voice in the back of her mind whispered, “Why not me?”

Notes:

Hello my wonderful readers! This was written for a fest in the Tainted Souls Discord Server. We are a community of writers who carved out a little safe bubble for others like us. We stream movies 2x a week, host writing events several times a year, talk about our favorite characters and even our kinks. We are an 18+ only server. We are LGBTQ+ and dead dove friendly as well. The server is fandom related and all fandoms are welcome.

Stop by and see if you find a new home!

https://discord.gg/taintedsouls