Chapter 1: Blood and Vows
The air in the wedding hall tasted of ash and dark honey. Asteria stood perfectly still before the black marble altar, the weight of her dress—layers of silk and shadow—anchoring her to the spot. From the corners of her vision, Sirius and Regulus Black flanked her like twin pillars of a dynasty she’d only just learned was her own.
Their ancestors watched from oil-paint prisons on the walls. Their stares were not blessings; they were assessments.
The officiant’s voice droned on, Latin syllables twisting through the candle smoke. Asteria barely heard him. Her mind kept flickering, a faulty projector showing images that couldn’t be real: a boy with a lightning scar, celebrating in a great hall, light winning. The memories felt like someone else’s dream. Here, the candles guttered in a cold draft. Here, the Dark Lord’s victory was the foundation upon which this very manor stood.
A warm, calloused finger hooked under her chin, tilting her face up. Sirius’s grey eyes were inches from hers, a predatory smile playing on his lips. “Back with us, little star?” he murmured, his voice a private rumble beneath the ceremony. “You were miles away.”
“Just thinking,” she whispered.
“Don’t,” Regulus said from her other side. His voice was cooler, smoother. He didn’t touch her, but his presence was a pressure against her skin. “Thinking leads to doubts. There is no room for doubt here.”
The officiant cleared his throat. It was time.
Sirius’s hand enveloped hers first, his thumb stroking a possessive circle over her knuckles. The magic of the vow was not a gentle glow, but a swift, searing brand that wrapped around her wrist, a chain of warm, dark light. It didn’t hurt. It felt like a claim.
“Tibi semper fidelis ero. Te protegam. Te possidebo,” Sirius swore, his eyes locked on hers. I will be faithful to you. I will protect you. I will possess you.
The chain pulsed and sank into her skin, invisible but forever felt.
Then Regulus took her other hand. His grip was precise, his fingers long and elegant. The second chain was different—colder, sharper as it formed, a perfect counterweight to his brother’s.
“Sanguinem meum sanguini tuo iungo. Mentem meam menti tuae coniungo. Usque ad finem,” Regulus intoned. I join my blood to your blood. I link my mind to your mind. Until the end.
As the second chain dissolved into her, Asteria felt a sudden, dizzying clarity. A fragment of Regulus’s calm calculation, the relentless order of his thoughts, brushed against the edges of her consciousness. From Sirius, a flash of fierce, blazing heat—protectiveness, desire, a hint of impatience. The connection was fleeting, a door opened and then shut, but the implication was permanent. They were in her now.
“Well,” Sirius said, the formal tension snapping as he pulled her to his side, his arm a solid bar around her waist. “That’s that. Ours.”
“The property is prepared,” Regulus stated, offering his arm with princely formality. “The wards recognized our combined magic the moment the vows sealed. It is waiting for us.”
They led her from the hall, not to a cacophony of cheers, but through a silent gauntlet of acknowledging nods. The politics of this world were quiet, deadly, and Asteria understood her role in it. She was the reclaimed heirloom, the unexpected key to some larger plan. She straightened her spine, letting the black lace of her veil stream behind her.
The new home was not Black Manor. It was a smaller, sleek townhouse nestled in a warded enclave of London, all charmed windows and dark wood. The moment they crossed the threshold, the air shifted, humming with a magic that felt like theirs.
Sirius shrugged off his formal robes, tossing them over a sleek, black sofa. “Freedom,” he announced, grinning. “No mother screeching about portraits. No father judging every firewhisky. Just us.”
Regulus was more meticulous, placing his robes on a hanger that floated away. “Just us, and the considerable expectations we now embody.” He turned to Asteria. “What do you think of your cage, wife?”
She met his cold gaze, then looked to Sirius’s heated one. A slow smile curved her own lips. She walked to the large window, tracing the complex runes etched into the glass with a fingertip. They glowed faintly at her touch.
“It’s not a cage,” she said, her voice clear in the quiet room. “It’s a workshop. And you two are my most fascinating projects.”
Sirius laughed, a loud, delighted sound. He strode over, wrapping his arms around her from behind, nuzzling into the crook of her neck. “I knew you were perfect.”
Regulus approached more slowly, his eyes analytical. “Projects? You intend to… modify us?”
“I intend to understand you.” She leaned back into Sirius’s hold but kept her eyes on Regulus. “The vows say you possess me. The blood says we are linked. But the man… the heart. That’s not so easily commanded. Even by you.”
A flicker of something intense—approval, fascination—passed through Regulus’s stony expression. “Asteria Vale. Raised a Muggleborn, yet you think like a pureblood. You seek the underlying contract.”
“I am a pureblood,” she corrected gently, the truth still strange on her tongue. “A Black. And I’ve read the terms. Now I want to see the small print.”
Sirius turned her in his arms, his hands firm on her hips. “And how does my little wife plan to conduct her research?”
His tone was teasing, but his eyes were hungry. For her, for the game, for the uncharted territory she represented.
Asteria reached up, one hand curling behind Sirius’s neck, the other extending to beckon Regulus closer. He came, stopping just within reach.
“Practically,” she said, her storm-grey eyes bright with a challenge they had not anticipated. “Starting now. You both love me. You say it with vows and chains and looks. I want to hear you say it without a single spell in the room. And I want to mean it when I eventually say it back.”
The silence that followed was profound, broken only by the crackle of the newly-lit hearth. Sirius’s grin softened into something more genuine, more dangerous. Regulus simply stared, as if she’d just performed a miraculous piece of magic.
Outside, London slept under a starless sky. Inside, the game had truly begun. And Asteria, her silver-blonde hair finally free of its black veil, held the first move.
And Asteria, her silver-blonde hair finally free of its black veil, held the first move.
Sirius answered it by sweeping her off her feet, his laugh a low vibration against her ear. “Research,” he muttered, carrying her towards the curved staircase. “I’ll show you my methodology.”
Regulus followed, a silent shadow. “Empirical evidence is crucial,” he said, his voice cool but his eyes burning in the dim stairwell light. “We must be thorough.”
Their bedroom was all deep greens and blacks, dominated by a vast bed. Sirius set her on her feet beside it, his hands already at the fastenings of her intricate dress. Regulus watched, leaning against a poster, his fingers undoing his own cufflinks with precise, slow twists.
The dress pooled at her ankles like spilled ink. The cool air raised goosebumps on her skin. She stood before them, not shy, but assessing. This was the first test.
“Beautiful,” Sirius breathed, his gaze hungry, roving. He traced the line of her collarbone with a blunt fingertip. “But still talking like you’re in charge.”
“I’m not,” Asteria said, and meant it. She let her shoulders relax, her chin dip slightly. A calculated surrender. “The vows are cast. I’m yours. I just want to know what that means.”
Regulus pushed off the bedpost. “It means,” he said, closing the distance, “that we take what is ours.” His kiss was not like his brother’s. It was slow, deep, and demanding, a claim of intellect as much as body. When he pulled back, her lips felt swollen. “And we learn what pleases us.”
What followed was a blur of skin and heat and breathless instruction. Sirius was fire, all consuming passion and growled praise. “That’s it, take me, you feel so perfect, so tight for us.” He worshiped her with his mouth between her thighs until she came apart with a broken cry, her fingers tangled in his dark hair, the sensations so sharp they bordered on pain.
Regulus was ice, a controlled burn. He preferred her on her knees, his hand fisted in her hair as he guided himself into her mouth, his other hand tilting her chin up so he could watch. “Precise,” he would murmur, his voice taut. “Just so. You learn quickly.” His praise was a reward that shuddered through her more than any touch.
They took turns, they took her together. Sirius pinned her hips to the mattress, driving into her cunt from behind while Regulus knelt before her, his cock sliding over her tongue, his thumbs brushing her cheeks. The world narrowed to the push and pull of them, the smell of sex and salt and their particular scent—night air and old books and magic.
When a soft pop announced the house elf with a tray of food and wine, they barely paused. Sirius snatched a bunch of grapes and a goblet, feeding both to Asteria as Regulus continued moving inside her, his rhythm unbroken. They ate roasted chicken with their fingers, licking the grease from each other’s skin. They drank dark wine straight from the bottle, some of it spilling down her chest, chased by Sirius’s tongue.
Sleep was a brief, heavy collapse of limbs in the damp sheets, only to be woken by a mouth or a hand, the cycle beginning anew.
By the second day, every muscle ached in the best way. She was slick, sore, and utterly alive. Her research continued. She learned Sirius loved the soft, desperate sounds she made when she was close, and would edge her relentlessly to hear them. She learned Regulus’s breath hitched, just once, right before he finished, a tiny crack in his marble composure.
And she learned her own power within submission. When Sirius bent her over the arm of a sofa, his hand coming down sharp on her arse until the skin bloomed hot and red, she pushed back into the sting, a wordless demand for more. The humiliation of the act was fused with the fervor of his praise—“Look at you, our perfect, greedy girl”—until the two were inseparable, a single chord of pleasure.
When Regulus finally prepared her for his cock in her ass, the process was slow, clinical, agonizing. Oils and careful, stretching fingers. He watched her face the entire time. “This is a privilege,” he whispered, his lips against her temple as he pressed the head of his cock against her. “This intimacy. We give it to no one else.” The initial burn was blinding, a stretch that felt impossible, but as he began to move, so slowly, it transformed into a deep, full ache that built into a shocking, resonant peak that had her sobbing.
She explored them too. Her mouth, her hands, learning the maps of their bodies. She discovered the scar on Sirius’s hip from a childhood mishap with a broom, and traced it with her tongue until he shuddered. She learned that a particular spot just behind Regulus’s ear, when nipped, made his careful rhythm fracture completely. She could bring them to their knees, make them curse and spill into her hand or over her stomach, even while she was the one pinned beneath them, and in those moments, the possession felt mutual.
The weekend blurred. The outside world ceased. There was only this room, this bed, their bodies, the tray that appeared and disappeared, the empty bottle of wine rolling across the floorboards. The silent, profound negotiation of three people learning the grammar of a single, shared sentence.
As a deep, velvety Sunday night wrapped around the house, they were a tangled knot of exhaustion. Asteria lay on her back, Sirius heavy and asleep half on top of her, his breath warm on her neck. Regulus was on his side facing her, one possessive arm slung across her waist, his fingers loosely curled against her skin. Every inch of her felt used, thoroughly known, and strangely, peacefully, her own.
Her last thought before sleep pulled her under was that she had her first data points. Their love was not gentle. It was a devouring thing. And she, heart hammering a quiet, triumphant rhythm against Sirius’s chest, found she had an appetite for it.
And she, heart hammering a quiet, triumphant rhythm against Sirius’s chest, found she had an appetite for it.
The Townhouse was just a preamble. Blackwood Estate, revealed by a silvery, liquid Portkey that deposited them on a crest of land at dawn, was the true prize.
It was not a manor. It was a kingdom.
Asteria stood on the gravel drive, the early mist cooling her skin, and simply stared. The house was a sprawling symphony in dark stone and ivy, more angular and modern than the gothic weight of Black Manor. It was all sharp peaks and vast windows, overlooking acres of wild woodland that dipped down to a silver-glinting lake. The air smelled of pine, damp earth, and magic so old it was woven into the roots of the trees.
“No portraits,” Regulus said, coming to stand beside her, his shoulder brushing hers. “No elves, unless we summon them. The wards are keyed only to us. They are… aggressive. Father called it a retreat. I believe he used it for darker things. We’ll make it ours.”
“Ours,” Asteria repeated, the word tasting different here, cleaner. She could feel the hum of the land under her feet, a silent, powerful familiar. She looked at Sirius, who was grinning like a boy who’d just nicked the fastest broom.
“Come on,” he said, grabbing her hand. “I want to show you the bathroom. There’s a tub the size of the Hogwarts lake.”
They spent days just exploring. The sunroom, her favorite, became the stage for their first normal morning. It was all light and green, glass from floor to ceiling overlooking the untamed gardens. A tray of breakfast—real breakfast, not just sustenance grabbed between rounds of lovemaking—floated between them: fresh pastries, poached eggs, black coffee in heavy ceramic mugs.
Sirius was sprawled on a deep-cushioned chaise, barefoot, wearing only a pair of low-slung trousers. He tossed a berry into the air and caught it in his mouth. “So,” he said, chewing. “We’re rich, we’re married, we’re free. What now? Spend the next sixty years fucking in every room?”
Regulus, impeccably dressed in a dark green sweater and trousers, sliced a pear with precise cuts. “An appealing prospect, but intellectually stagnant. We have positions to consider. A social footprint. Even with the Dark Lord’s peace, influence must be cultivated, not merely inherited.”
Asteria curled her legs beneath her on the wide window seat, cradling her coffee. The warmth seeped into her palms. “You mean jobs.”
“I mean pursuits,” Regulus corrected gently. “We don’t require galleons. We require purpose. Channels for our… particular energies.”
Sirius snorted. “Don’t look at me. I’m not pushing parchment in the Ministry like some useless junior under-secretary. I’d Avada myself by lunchtime.”
“I wasn’t suggesting you would,” Regulus said, his gaze sharp. “Auror work is out of the question. It’s become largely administrative, a tool for monitoring, not justice.” He paused, studying his brother. “But you have a talent for destructive magic. And a disturbing lack of fear.”
A slow grin spread across Sirius’s face. “Get to the point, Reggie.”
“Curse-breaking. Not for Gringotts—their protocols are restrictive. Private, specialized contracts. Old families always have things festering in their attics or buried on their lands. Dark artifacts, failed experiments, ancestral tombs that have… developed personalities. It’s dangerous. Unregulated. It would leverage your particular skills and keep you from dying of boredom.”
Sirius’s eyes lit up, the grey turning molten. He looked out at the wild woods, as if already seeing tunnels and ruins. “That… has potential. I could do that. On my own terms. Travel, blast things to bits, get paid a fortune for it. Yes.”
It fit him perfectly, Asteria thought. A sanctioned outlet for his chaos.
“And you?” she asked Regulus.
He placed his knife neatly on the edge of his plate. “The work is already there. With the… integration policies, many established families are… anxious. They want to trace magical lineage in Muggleborn arrivals, to see if there’s a squib line to be reclaimed, or to prove there isn’t. It requires research in old archives, understanding of blood rituals most have forgotten.” His voice was calm, but there was a fervent gleam in his eye. “It’s the ultimate puzzle. History, blood, and power, all encoded in parchment and DNA. I’ve already had inquiries. It would be a consultancy. Quiet, influential, and utterly essential to the new world order.”
It was the most Regulus thing she could imagine. A silent, scholarly power, pulling the strings of bloodline narratives from a mahogany desk.
Both of them looked at her then. The question hung in the sun-dappled air.
Asteria took a slow sip of coffee. “I don’t want a full-time job,” she said finally. “I want… a workshop. A craft.”
Sirius raised an eyebrow. “Like knitting? I’d pay to see you knit a cursed sweater.”
She kicked his foot lightly with her own. “Like spellcraft. Spellwrighting. Creating new spells, modifying existing ones. There’s an artistry to it no one really explores. Most people just use what’s in the books.” She gestured around the sunroom, to the estate beyond. “I could do it here, in a study. Or take my notes to a coffee shop in Diagon Alley. Or,” she added, a sly glance at Regulus, “camp out in your archives when I need inspiration. It’s portable. It’s part-time. It’s entirely mine.”
The silence was thoughtful, approving.
“A spellwright,” Regulus mused. “It’s a rare talent. Theoretical, yet intensely practical. It would be a significant asset. And it would keep that terrifyingly adaptive mind of yours occupied.”
“See, this is why we’re perfect,” Sirius announced, swinging his legs to the floor. “Regulus plays with blood and history, I play with live curses, and you, my gorgeous wife, play with the very fabric of magic itself. We’re not just a marriage. We’re a full-service dark arts conglomerate.”
He got up, padding over to the window seat. He loomed over her, blocking the sun for a moment, before bending to press a kiss to the top of her head. It was unexpectedly soft. “Create a spell to make my coffee never go cold, would you? That’s a project I can get behind.”
Regulus stood as well, gathering the plates with a flick of his wand. “We’ll need to set up studies. The east wing has potential. I’ll begin drafting proposals for my venture this afternoon.” He looked at them both, and something in his cool demeanour thawed, just a fraction. “This… is acceptable.”
Asteria watched them, these two dark stars she’d bound herself to, already spinning off into their chosen orbits. She felt a surge of something fierce and possessive. They were hers to understand, to influence, to love.
Sirius was right. They were a conglomerate. And as she gazed out at the boundless, warded woods of Blackwood, her mind already flickering with possible spell matrices, she knew her first real project wouldn’t be a charm for coffee.
It would be for them. A spell to weave their three distinct magics, their three volatile hearts, into something unbreakable. Something new.
She smiled, and took another sip, letting the bitter, perfect warmth spread through her.