You're contemplating this as you stare at your brand-new, Dorn-approved desk, a monument to Imperial efficiency that could probably survive a direct hit from a macro cannon, while Perturabo's latest 'gift' hums quietly in the corner. It's some kind of automated tea service that he's been tinkering with for weeks and you're reasonably sure it's achieved sentience at this point.

"The water temperature is optimal" it announces in a voice that sounds suspiciously like its creator's. "Your stress levels appear elevated. Shall I prepare the usual blend?"

Before you can answer the door chimes. Once. Precise, economical, announcing exactly who's on the other side without wasting anyone's time.

"Come in, Rogal."

Dorn enters like he does everything else, purposefully, without dramatics, but somehow managing to fill the entire space just by existing. He's traded his usual armor for simple robes which on anyone else would look casual. On him they look like a uniform for relaxation, each fold precisely arranged.

"You appear tired" he observes and there's something in his voice, a softness that most people never hear because they're too busy being intimidated by the whole 'Praetorian of Terra' thing.

"Long day." You gesture vaguely at the data-slates scattered across your indestructible new desk. "Your brother has some... opinions about the supply chain modifications I suggested."

Dorn's expression doesn't change but something shifts in his posture. "Perturabo is... particular about his methods."

It's probably the closest thing to criticism you'll ever hear him voice about a fellow Primarch which is how you know he's genuinely concerned. Rogal Dorn doesn't do diplomatic euphemisms unless someone he cares about is involved.

The tea service chooses that moment to wheeze dramatically. "Incoming transmission from Lord Perturabo" it announces, because of course Perturabo turned your tea maker into a communications device. "He sounds... agitated."

"Put him through" you sigh.

The hologram that materializes is decidedly grumpy, even by Perturabo's standards.

"The modifications you proposed" he begins without preamble "are structurally inadvisable. The weight distribution alone would compromise the integrity of the lower decks and don't get me started on the thermal dynamics—"

"Hello, Perturabo" Dorn interrupts, his tone carefully neutral.

The hologram pauses and you watch something complicated flicker across Perturabo's face when he notices his brother. It's always like this when they're in the same room, or in this case, when one of them is in the room and the other is a slightly pixelated projection complaining about engineering specifications.

"Rogal." The name comes out like he's testing the weight of it. "I wasn't aware you were... visiting."

There's a question buried in there somewhere, wrapped up in layers of sibling rivalry and the kind of emotional constipation that seems to be a family trait among the sons of the Emperor. You've learned to navigate these conversations carefully because one wrong word can turn your quarters into a philosophical battlefield about the nature of fortification versus siege warfare.

"I was reviewing the structural improvements you made to her quarters" Dorn continues, apparently oblivious to the tension. "The reinforcement of the eastern wall was... adequate."

You nearly choke on air. In Dorn-speak 'adequate' is practically a love letter. Perturabo's hologram straightens slightly, caught between pleasure and suspicion.

"Adequate?"

"The load-bearing calculations were correct" Dorn clarifies which somehow makes it both better and worse.

This is your life now. Watching two demigods have feelings at each other through architectural critique while your tea service provides commentary like some sort of caffeinated Greek chorus.

"If you're both finished discussing my structural integrity" you interrupt before this can evolve into a full-scale debate about construction methodology "I'd like to address the actual supply chain issue that started this conversation."

Perturabo's attention snaps back to you with laser focus. "The issue is that your proposal doesn't account for the cascade effects of rerouting supply lines through sectors seven through twelve. The additional strain on the transport network would—"

"Would be offset by the reduction in transit time through the Mandeville point" you finish. "I know. I ran the calculations."

"Your calculations assume optimal conditions—"

"My calculations assume you'll find a way to make it work because that's what you do." You lean back in your chair, one of the few pieces of furniture that predates Dorn's efficiency improvements and watch Perturabo's expression shift from irritation to something more complicated. "You're the Lord of Iron, Perturabo. If anyone can make an impossible supply chain work, it's you."

It's a cheap shot, appealing to his pride like that but you've learned that sometimes the direct approach works best with Primarchs. They're not used to people believing in them for reasons that don't involve their ability to kill things efficiently.

The hologram flickers, whether from technical difficulties or because Perturabo is having emotions, you're not sure. "The engineering challenges would be... significant."

"But not impossible?" you press.

"Nothing is impossible" he mutters which is as close to agreement as you're going to get. "I'll need to recalculate the stress tolerances for the secondary junctions and the power distribution will require a complete overhaul of the relay systems..."

He's already lost in the problem, you can see it happening. Perturabo's mind works like a siege engine, slow to aim but devastating once it finds its target. You've just given him something worthy of his attention, a puzzle complex enough to satisfy that brilliant, restless intellect.

"I could assist with the structural assessments" Dorn offers quietly.

The hologram freezes. For a moment you think the transmission has failed but then Perturabo blinks, focuses, looks at his brother like he's seeing him for the first time.

"You... want to help?"

"Your expertise in siege craft combined with my knowledge of fortification could... optimize the solution."

It's such a carefully diplomatic way of saying 'I want to spend time working on something with you' and you can see the exact moment Perturabo realizes it. Something vulnerable flickers across his face before he can stop it, quickly buried under his usual scowl.

"I suppose... if you have nothing better to do than review supply manifests..."

"I don't" Dorn says simply and the honesty in it makes your chest tight.

This is the thing about being caught between them, it's not just about you. They orbit each other like binary stars, locked in gravitational dance that's lasted for a while by now. Sometimes you think you're not so much caught between them as you are the excuse they use to be in the same room together without having to admit that's what they want.

"Right" you say, standing up before this can get any more emotionally complicated than it already is. "In that case I'll leave you two to work out the details. I have some reports to file.

"You're leaving?" Perturabo's hologram looks almost... disappointed.

"Unless you need me to referee while you argue about load-bearing specifications?"

"We don't argue" Dorn says with absolutely no trace of irony. "We discuss engineering principles."

"You threw a data-slate at my head last week."

"That was not thrown. It was... propelled with purpose."

Perturabo snorts, actually snorts, and for a moment he looks younger, less bitter. More like the brilliant architect who used to build wonders instead of weapons. "At least I aim when I'm 'propelling with purpose.'"

"Your aim has always been adequate" Dorn replies and there's something almost fond in his voice.

You leave them to it, slipping out of your quarters while they're distracted by what passes for affection in their family. The corridors of the Iron Blood are quieter at this hour, most of the crew busy with their duties or catching what sleep they can between shifts. It gives you time to think, to process the strange domesticity of your situation.

Because that's what it is, isn't it? Domestic. Two Primarchs arguing about engineering specifications while your tea service provides commentary and your furniture gets steadily more indestructible. It's not what you expected when you first caught their attention, either of their attention.

You'd been a logistical specialist, assigned to coordinate between the Iron Warriors and Imperial Fists during the joint operation on Krathos VII. Nothing special, just good at your job and stubborn enough to keep pushing when the numbers didn't add up. Most people learned to stay out of Perturabo's way when he was in one of his moods. You'd walked into his command center during a tactical briefing and corrected his calculations.

To his face.

In front of his officers.

Everyone in the room had gone dead silent, waiting for the Lord of Iron to reduce you to component atoms but instead he'd stared at you for a long moment and said "Show me."

Dorn's attention had come later, drawn by your work optimizing the supply chains for the extended siege. He'd found you in the data-archives at 0300, cross-referencing manifest logs and calculating transport efficiency and instead of asking why you weren't asleep like a normal person, he'd sat down across from you and started reviewing your work.

"This could be improved" he'd said, pointing to a routing algorithm you'd spent weeks perfecting.

"How?"

And he'd shown you. Patient, methodical, explaining not just what to change but why, how each modification would cascade through the system to improve overall efficiency. You'd worked until dawn, trading ideas and solutions and somewhere in those quiet hours you'd realized that Rogal Dorn, Praetorian of Terra, Master of the Imperial Fists was lonely.

They both were in different ways. Perturabo with his bitter pride and endless need to prove himself, Dorn with his duty-bound isolation and inability to connect with anyone who couldn't match his intellectual rigor. Maybe that's why this works, this strange arrangement you've fallen into. You're not trying to compete with them or worship them or use them for political advantage. You're just... there. Present and stubborn and willing to argue with demigods about supply chain optimization.

Your wandering has brought you to the observation deck where the void stretches out in all directions, stars scattered like dust across black silk. It's peaceful here, quiet enough to hear your own thoughts without the constant hum of ship systems and the weight of two Primarchs' attention.

You're not alone for long.

"You left." Perturabo's voice comes from behind you, real this time instead of projected. He moves quietly for someone in power armor, but then again, siege warfare requires a certain degree of stealth.

"You and Rogal seemed to have things well in hand" you reply without turning around. "Did you work out the transport calculations?"

"We... made progress." There's something odd in his voice, a note you can't quite identify. "He has some interesting ideas about redundant pathway systems."

"High praise, coming from you."

"Don't mock me."

The snap in his voice makes you turn and you're surprised by what you see. There's something raw in his expression that makes your chest tighten. He's beautiful in the way that dangerous things are beautiful, all sharp angles and barely contained energy, like a weapon that's been forged into the shape of a man.

"I wasn't mocking you" you say quietly. "I know how hard it is for you to admit when someone else has good ideas."

"It's not—" He stops, jaw clenching. "You don't understand."

"Then explain it to me."

For a moment you think he won't answer, that he'll retreat behind that wall of bitter pride that keeps everyone at a safe distance. But something in your expression must convince him because his shoulders drop slightly and he looks out at the stars instead of at you.

"He's everything I'm not" he says finally. "Patient. Steady. Beloved by his sons, respected by his brothers. The Emperor's loyal hound, who never questions and never fails and never..." He trails off, hands clenching into fists.

"Never gets angry about being taken for granted?"

Perturabo's head snaps toward you, eyes wide with something like shock.

"What?"

"You think you're the only one who sees it?" You turn to face him fully, noting the way he tenses like he's preparing for an attack. "The way everyone expects him to be the responsible one, the reliable one, the one who'll hold the line no matter what it costs him? He carries the weight of the entire Imperium on his shoulders and nobody ever asks if he's tired."

"He chose that burden."

"Did he? Or was it chosen for him, same as you?"

The silence that follows is heavy with implications, with all the things that neither of them can say about their father and their purpose and the roles they've been cast in since before they had any choice in the matter.

"You see too much" Perturabo says finally.

"Occupational hazard. I'm good at finding inefficiencies in systems and the two of you are..." You gesture vaguely. "Well. You're not exactly running at optimal capacity."

Despite everything that gets a laugh out of him, short and bitter but genuine. "Optimal capacity. You make us sound like machinery."

"Aren't you, in a way? Built for specific purposes, designed to fulfill particular functions?" You step closer, close enough to see the way his breath catches when you reach up to touch his cheek. "That doesn't mean you can't be more than what you were made for."

His hand comes up to catch your wrist, not pulling you away but not quite letting you retreat either. His skin is warm despite the armor and you can feel the barely contained strength in his grip.

"What are you saying?"

"I'm saying that maybe the problem isn't that you and Rogal are too different. Maybe the problem is that you're too similar and neither of you knows how to deal with that."

"Similar?" The word comes out strangled. "We're nothing alike."

"You're both brilliant. You're both loyal to the point of self-destruction. You both care more than you want to admit about what people think of you and you're both so focused on your duties that you forget to be human sometimes." Your thumb brushes across his cheekbone. "And you're both terrible at asking for what you want."

"And what do I want?" The question is barely above a whisper.

You could give him the easy answer, the safe one. Talk about recognition or respect or all the things he's been denied by a galaxy that values his brother's steady competence over his brilliant innovations. But you're tired of safe answers, tired of dancing around the truth that's been sitting in the middle of your quarters like an unexploded ordnance.

"The same thing he wants," you say. "To matter to someone who isn't afraid of you. To be chosen instead of assigned. To know that you're valued for who you are, not just what you can build or break."

Perturabo stares at you like you've just revealed some fundamental secret of the universe, and maybe you have. Maybe that's what this has always been about, not rivalry or competition but two brothers who've spent so long being weapons that they've forgotten how to be men.

"And you?" His voice is rough now, intimate in the way that only comes when someone's defenses have been completely stripped away. "What do you want?"

The honest answer should terrify you. You're standing on the observation deck of a ship full of Astartes, having a conversation that could reshape the balance of power in the galaxy and all you can think about is the way Rogal's eyes soften when he thinks no one is looking and the careful precision with which Perturabo rebuilt your tea service from memory after the original was damaged in a transit accident.

"I want you both to stop pretending that caring about each other is a weakness" you admit. "I want Rogal to let himself want things that aren't duty or obligation. I want you to believe that you deserve to be happy. And I want..." You take a breath, commit to the words that will change everything. "I want to keep being the excuse you use to be in the same room together until you don't need an excuse anymore."

The kiss, when it comes, tastes like promethium and starlight and all the words he's never learned how to say. Perturabo kisses like he does everything else, with complete focus and barely restrained intensity like he's trying to solve you through application of overwhelming force. His hands tangle in your hair, pulling you closer and you can feel the tremor in his grip that says he's afraid you'll disappear if he lets go.

When you finally break apart, he rests his forehead against yours, breathing hard.

"This is inadvisable" he murmurs but doesn't pull away.

"Probably."

"Rogal will have... opinions."

"He'll have feelings" you correct. "Whether he admits it or not."

"And if he doesn't approve?"

You think about that for a moment, consider the careful way Dorn watches both of you when he thinks you're not looking, the way he always finds excuses to work late when Perturabo is in your quarters as if being nearby is enough.

"I think" you say carefully "that Rogal has been waiting for someone to give him permission to want things. Both of you have."

Perturabo pulls back enough to study your face, searching for something. "You're certain about this? About... us?"

The 'us' encompasses more than just the two of you and you both know it. It's an acknowledgment of the gravitational pull that's been building for months, the way three separate orbits have slowly aligned into something that might be stable if you're all brave enough to commit to it.

"I'm certain that I'd rather try and fail than spend the rest of my life wondering what might have been."

Something shifts in his expression, hope and terror warring for dominance. "The others will talk."

"Let them. I've been having an inappropriate relationship with your furniture for months now, the gossip can't get much worse."

That startles another laugh out of him and this one is warm instead of bitter. "My furniture?"

"Do you know what Rogal's idea of romantic improvement is? He replaced my shower with something that has twelve different pressure settings and a water recycling system that could service a small city. I'm pretty sure it's more advanced than some planetary defense networks."

"He does tend toward... over-engineering." Perturabo's tone is fond despite himself. "Though I notice you didn't complain about the heated floors I installed."

"The heated floors are perfect. It's the automated voice alerts that are getting concerning. Yesterday it told me my posture needed improvement."

"I may have... over-calibrated the health monitoring systems."

"It offered to adjust my diet for optimal nutritional efficiency."

"That's... possibly a feature I should disable."

You're both laughing now, the kind of helpless laughter that comes when the universe reveals itself to be more absurd than you could have possibly imagined. Here you are, discussing home improvement with a Primarch like you're some sort of domestic partnership instead of a logistical specialist and a demigod who could level cities with his bare hands.

"We should go back" Perturabo says eventually, though he makes no move to leave. "Rogal will be wondering where we've gone."

"Will he?"

"He always knows where we are." The admission comes out quietly, like a secret. "I used to think it was tactical awareness, but..."

"But?"

"But tactical awareness doesn't explain why he always finds excuses to route his patrols past your quarters when I'm visiting."

Your heart does something complicated in your chest because of course Rogal has been watching, keeping track, making sure you're both safe in the only way he knows how. Duty and protection and care all wrapped up in the kind of stoic vigilance that most people mistake for indifference.

"We should go back" you agree. "Before he starts worrying that we've been vented into space or something equally catastrophic."

"He doesn't worry—"

"He absolutely worries. He just shows it by running structural integrity checks on everything you might have touched and calculating the statistical probability of various disaster scenarios."

Perturabo considers this for a moment then nods slowly. "That... would explain the additional security sweeps."

The walk back to your quarters is different now, charged with new possibility and the weight of admissions that can't be taken back. Perturabo walks closer than he used to, close enough that you can feel the warmth radiating from his armor and when your fingers brush against his he doesn't pull away.

Your quarters are exactly as you left them except for the fact that Dorn is no longer alone. He's been joined by your tea service which appears to be briefing him on optimal brewing temperatures with the kind of mechanical enthusiasm that suggests Perturabo has been making modifications again.

"—and the addition of the secondary heating element ensures consistent thermal regulation even during power fluctuations" the machine is explaining. "Lord Perturabo calculated the specifications himself to account for the reader's particular preferences."

"Impressive attention to detail" Dorn replies gravely as if receiving engineering briefings from kitchen appliances is a normal part of his day.

"You're back" he observes when he notices you both in the doorway and there's something in his voice that might be relief.

"We were discussing the supply chain modifications" Perturabo says which is technically true if you ignore everything that happened after the technical discussion ended.

Dorn's gaze moves between you and his brother, cataloging details with the kind of precision that makes him such an effective strategist. You know he sees the slight flush on your cheeks, the careful distance that means you're both trying very hard not to touch each other in front of him.

"I see" he says finally. "And did you reach any conclusions?"

The question is layered with meaning and you realize that this is the moment, the point where everything either moves forward or fractures beyond repair. Dorn is giving you both the chance to retreat, to pretend that nothing has changed, to maintain the careful status quo that's kept all three of you dancing around each other for months.

You look at Perturabo, see him tense like he's preparing for rejection, and make your choice.

"We did, actually." You step closer to Rogal, close enough to see the way his pupils dilate when you reach up to touch his face the way you touched his brother's. "We concluded that some things are worth the risk."

For a moment Dorn is perfectly still. Then his hand comes up to cover yours, pressing your palm against his cheek and the careful control he maintains every waking moment cracks just enough to let something vulnerable show through.

"Risk" he repeats quietly.

"Of failure. Of complication. Of people talking." Your thumb brushes across his cheekbone, mirroring the gesture you made with Perturabo. "Of admitting that what we all want isn't exactly standard protocol."

"Standard protocol" Dorn says slowly "does not account for all variables."

It's the closest thing to 'I want this too' that you're likely to get from him without a direct assault on his emotional fortifications but it's enough. You can see the want in his eyes, carefully contained but unmistakably present.

"No" you agree. "It doesn't."

The kiss is different from Perturabo's, gentler but no less intense, like a siege conducted with infinite patience instead of overwhelming force. Dorn kisses like he builds with careful attention to structure and foundation, making sure every angle is properly supported before moving to the next. His hands are steady on your waist, anchoring you and when he finally pulls back you can see something that might be wonder in his expression.

"This is... unprecedented" he says.

"Most good things are."

From across the room Perturabo makes a sound that might be amusement. "Unprecedented. That's one way to describe it."

Dorn's attention shifts to his brother and you watch something pass between them, recognition perhaps or acknowledgment of the change in their gravitational balance. They've been orbiting each other for so long that they've forgotten how to be anything else but maybe that's about to change too.

"Your calculations were correct" Dorn tells him. "About the supply routes. The redundant pathways will reduce transport time by twelve percent while maintaining structural integrity."

It's such a Dorn way of saying 'I enjoyed working with you' and from the way Perturabo's expression softens you can tell he understands the translation.

"Your fortification expertise was... valuable," Perturabo replies carefully. "Perhaps we could collaborate on future projects."

"I would find that... acceptable."

You're watching two Primarchs attempt emotional intimacy through the medium of engineering compliments and somehow it's the most romantic thing you've ever witnessed. They're trying so hard to connect without admitting that's what they're doing like acknowledging the want directly would somehow diminish it.

"Right" you say because someone needs to move this conversation forward before they disappear entirely into technical specifications. "So we're doing this. All of us. Together."

"Together" Dorn repeats, testing the word.

"It will be... complex" Perturabo adds.

"Everything worthwhile is complex." You look between them, these two brilliant, damaged demigods who've somehow decided you're worth the risk. "But I think we're all smart enough to figure it out."

"The logistical challenges alone—" Perturabo begins.

"Will be manageable" you interrupt. "We'll schedule everything. Create systems. Make it work because that's what we do."

"And the others?" Dorn asks. "The talk will be... significant."

"Let them talk. What are they going to do, court-martial all three of us? You're Primarchs. I'm very good at my job. We'll handle whatever comes."

The tea service chooses that moment to chime cheerfully. "Shall I prepare refreshments? The stress indicators suggest this would be an optimal time for nutrition intake."

All three of you turn to stare at the machine which continues humming contentedly as it begins the precise ritual of beverage preparation. There's something absurd about having your relationship status analyzed by kitchen equipment but somehow it fits the strange domesticity that's developed between you.

"I really need to recalibrate those sensors" Perturabo mutters.

"The readings appear accurate" Dorn observes. "We have been... emotionally active."

"Emotionally active" you repeat. "Is that what we're calling it?"

"Would you prefer a different terminology?"

The question is serious because of course it is. Rogal Dorn approaches everything with the same methodical precision, including apparently the classification of feelings. You could give him a technical answer, something clean and efficient that reduces the complexity of what's happening between you to manageable categories.

Instead you step closer, close enough to feel the warmth radiating from both of them and let yourself be honest.

"I'd prefer to call it what it is" you say. "Complicated and unprecedented and probably inadvisable but ours."

The word hangs in the air between you, ours, carrying weight that goes far beyond simple possession. It's acknowledgment and commitment and promise all wrapped up in four letters and you can see the moment both of them understand what you're offering.

"Ours" Perturabo echoes, and there's something almost reverent in his voice.

"Yes" Dorn agrees simply because for all his complexity, some things really are that straightforward for him.

The tea service announces that refreshments are ready with mechanical pride and you realize that this is your life now. Shared quarters and collaborative engineering projects and two Primarchs who show affection through structural improvements and precision beverage preparation. It's not what you expected when you first caught their attention but it's yours.

And maybe that's enough.