The days in hyperspace bled into one another, a monotonous river of white light. But something was wrong. Ralaen felt it in a low-grade hum beneath her skin, a restlessness that had nothing to do with boredom. Her senses felt too sharp. The ship's usual scent, the clean ozone tinge of life support, had become a chemical assault. The low hum of the gravity and drive systems, normally a comforting presence, vibrated directly into her skull. Her appetite was a feral, demanding thing, a constant gnawing hunger that food never truly satisfied. Even the water from the dispenser tasted metallic and thin on her tongue, failing to quench a thirst that went deeper than her throat.

  She was trying to burn it off on the firing range. The sharp crack-thump of the pulser, the smell of ozone and superheated metal, the rhythmic recoil. It was a familiar meditation. But today, even that wasn't working. She was distracted, her shots landing just outside the bullseye with irritating consistency. It was like being on a hunt, she thought with a flicker of annoyance, but there was no prey. No scent. Just the constant, buzzing need for a chase that would never come.

  Your biometrics are elevated, Artemis’s voice noted in her mind, a familiar, unwelcome nudge. Heart rate, cortisol, adrenaline. This is the fourteenth day in a row. It is not a normal stress response.

  I'm fine, Ralaen thought back, slapping a new power pack into the pistol. The metal felt cold and unsatisfying in her grip.

  You are not 'fine,' Artemis insisted, her tone shifting from clinical to that particular brand of persistent nagging Ralaen was coming to know all too well. Your body is presenting a cascade of symptoms for which my database has no precedent. This is an unknown variable. I dislike unknown variables. You will report to Dr. Dubois in the med bay. She is one of the foremost experts on xenobiology in the ásveldi Imperium. It is a logical course of action.

  Ralaen sighed, lowering her weapon. Logical. That was the problem with Artemis. She was always, infuriatingly, logical. "Damn it," she muttered, holstering the pulser. "Fine."

  ________________________________________

  The med bay was a vast, clean space of seamless white walls and brushed grey metal panels. The air was cool, carrying the sharp, clean scent of medical-grade antiseptics. Holographic displays floated in the air, and diagnostic equipment was built directly into the floors and ceilings, leaving the space feeling open and uncluttered. Dr. Elodie Dubois stood before a holographic display, her silver hair pulled back in its severe knot, her grey eyes scanning lines of data with unnerving intensity. She didn't look up as Ralaen entered.

  "Ralaen," she said, her voice a calm, measured alto. "Artemis's note was… cryptic. Said you were 'experiencing anomalous biological markers.'" She finally turned, her gaze sweeping over Ralaen, not with judgment, but with the detached curiosity of a biologist examining a new specimen. "So, tell me. What seems to be the trouble?"

  Ralaen shifted on her feet, her tail twitching anxiously. "I don't know. Just… on edge. Sensitive. Hungry all the time."

  "Mmm." Dr. Dubois made a note on her datapad. "And how is your sex life? Are you and your partner… active?"

  The question, so clinical and direct, still managed to make Ralaen's ears flatten. She felt a hot blush creep up her neck. "It's… fine."

  "Fine is not a clinical term," Dr. Dubois said, gesturing toward a diagnostic bed. "Please. I need a baseline scan. The scanner is non-invasive."

  Ralaen lay down, the bed hard and unyielding beneath her. A ring of light passed over her, silent and cool. She closed her eyes, trying to ignore the feeling of being examined down to the last cell.

  After a moment, Dr. Dubois made a soft, thoughtful sound. "Well, now. That is fascinating."

  Ralaen’s eyes snapped open. "What? What is it?"

  The doctor was looking at the holographic display, which now showed a rotating, anatomical model of Ralaen, shimmering with colored data points. "I did a bit of research on Asuari physiology and your pheromonal signature is complex to say the least. There's your own baseline pheromonal signature, of course. And then there's a clear secondary signature from your partner. Eirik, I presume. His scent is interlaced with yours. What's not expected is this." She pointed to a faint, third layer of data that was now actively glowing. "This tertiary signature. It was dormant, but it's… activating. And your endocrine system is working overtime, producing hormones that I have no data on."

  Ralaen sat up, her heart starting to pound. "What does that mean? Is something wrong with me?"

  Dr. Dubois finally turned to face her, her expression one of pure, unadulterated scientific delight. "Wrong? Ralaen, there is nothing wrong with you. At least nothing medically. You're simply experiencing a perfectly natural biological process." She paused, savoring the moment. "If I had to hazard a guess based on analogous mammalian physiology, I would say you're going into heat."

  The words hung in the sterile air. Ralaen just stared at her.

  Heat.

  The word landed like a slap. It was a term from old texts, from the deep-history lessons about what the Asuari had been before civilization. Before starships and treaties and the veneer of sophistication they'd built over millennia. It was what animals did. What creatures without reason or restraint surrendered to when their bodies demanded it.

  "Excuse me, what?"

  "Heat," Dr. Dubois repeated, as if discussing the weather. "A cyclical estrus. Now, I don't have the relevant data on Asuari biology, but I do know that many 'civilized' species evolve past it. It's an energetically expensive process, often rendered obsolete by social stability." She tapped her chin. "But a deep-rooted genetic memory like that doesn't just disappear. It gets archived. Buried."

  She looked at Ralaen, her eyes sharp and probing. "Has there been a significant, primal event in your life recently? Something that might… convince your body it's time to procreate?"

  Ralaen's face burned. She could feel the doctor's gaze, the weight of the question. She mumbled something, looking at her hands.

  "I'm sorry?" Dr. Dubois leaned closer. "I didn't catch that."

  "I said," Ralaen blurted out, the words tumbling over each other in a frantic rush, "Eirik and I mated! Okay? We… we had a fight, and he claimed me, and it was… intense," Ralaen said, blushing furiously. "But that shouldn't do this! This is ridiculous! Asuari don't go into heat! We evolved past this thousands of years ago! This is a nightmare, it's a biological regression, it's—"

  She couldn't even finish. The word primitive sat in her throat like a stone. Her ancestors had clawed their way out of the dirt to become something more than instinct and appetite. They had built cities, united the clans, reached for the stars. And now her body was dragging her back down into the mud, reducing her to a creature that needed and wanted without reason or control.

  Her ears were pressed so flat against her skull they ached. She couldn't look at Dr. Dubois. She couldn't look at anything.

  She was rambling, her voice rising in pitch and panic, but Dr. Dubois held up a hand, her expression unreadable.

  "Ralaen. Breathe," she said calmly. "You're right. It shouldn't." The doctor’s gaze drifted back to the hologram, her clinical curiosity overriding Ralaen's panic. "I was chief geneticist in Uppsalír for a decade. I saw dozens of human-Asuari pairings. Interspecies relationships can be intense, but I never observed anything remotely like this. A single mating, no matter how 'intense,' shouldn't be enough to trigger a dormant genetic cascade."

  She turned back to Ralaen, her eyes sharp with a new, more intense focus. "Which means we are missing a variable. A significant one." She began pacing slowly. "You are Asuari, yes. But you are also Einherjar. And your mate is human, and also Einherjar. We have two unique biologies interacting, both of which have been fundamentally altered by the Ascension program."

  Dr. Dubois stopped and looked directly at her. "The problem is, the official medical files on the Ascension process are… not just classified, they're non-existent. All I know is that it's a series of radical procedures that turn a person into something post-human. I have no idea what it does to your endocrine system, your cellular structure, or your reproductive biology on a fundamental level."

  She picked up a medical scanner from a tray. "I need more data. I need to run a deeper cellular scan. I need to analyze the interplay between your unique Asuari physiology and whatever the Ascension has done to it. This isn't just about Asuari mating habits anymore, Ralaen. This is about discovering the unknown side effects of the program that created you."

  She gestured to the bed again, her expression now one of intense, academic purpose. "If you're willing, you are quite possibly the most fascinating case study in the entire ásveldi Imperium."

  Ralaen agreed, if only to stop the frantic buzzing in her own mind. The next two days were a blur of sterile med bays and humming diagnostic equipment. Dr. Dubois was a woman possessed, her usual calm detachment replaced by a fierce, almost predatory focus. She took tissue samples, ran full-spectrum genetic scans, and made Ralaen sit for hours under a resonant imaging field that mapped the activity of every cell in her body.

  On the evening of the second day, Ralaen was dozing on the diagnostic bed when Artemis’s voice cut through her fatigue. The doctor has requested Eirik's presence. She is requesting biological samples from him.

  Ralaen was instantly awake, a cold spike of dread cutting through her fatigue. Why? What did she find?

  Unknown, Artemis replied. Her preliminary report is encrypted.

  Eirik. Here. While she was like this. While her body was doing something so shameful, so uncontrolled. The thought of him seeing her reduced to biology, to need, made her want to disappear into the diagnostic bed and never resurface.

  She has also placed a temporary medical restriction on all sexual activity for you both until her investigation is complete.

  Ralaen groaned, burying her face in her hands. A "no sex" order. Eirik was going to ask questions. He was going to want to know why. And she was going to have to explain that her body had betrayed everything she thought she was.

  He arrived ten minutes later, looking concerned. Dr. Dubois met him at the door, her expression unreadable. "Eirik. I need a sample. Blood, saliva, and… other things. Your biological signature is the missing variable in my equation."

  A case of literary theft: this tale is not rightfully on Amazon; if you see it, report the violation.

  Eirik looked from the doctor to Ralaen, a question in his eyes. Ralaen just gave a helpless shrug. He complied, his movements stiff with worry.

  The third day, Ralaen was summoned back to the med bay. The air was thick with a new kind of tension. Dr. Dubois looked exhausted. There were dark circles under her eyes, her grey hair was slightly disheveled, and she was clutching a mug of coffee as if it were a life raft.

  "Sit," she said, her voice raspy. She didn't wait for them to comply, turning to the main holographic display. It now showed two complex, interwoven helixes of genetic data. One Ralaen recognized as her own, the other as Eirik's.

  "For two days, I have been chasing a ghost," Dr. Dubois began, her voice gaining strength as she fell back into the rhythm of explanation. "I found a colony of bio-nano machines in your system, Ralaen. I don't know what they are, but they are incredibly advanced. They act like a… self-correcting immune system. And they were trying to rewrite your genome."

  She pointed to a section of Ralaen's helix where a flurry of chaotic data was highlighted. "They were attempting to graft a new, complex genetic sequence onto your cellular structure. A sequence they got from him." She gestured to Eirik's helix. "But they were failing. Incompatible. The constant, failed attempts were causing a massive systemic stress response. Your body was throwing every emergency switch it had. The 'heat' response, the heightened senses, the appetite… it was all a cascading failure caused by your own internal defenses fighting a war with your immune system."

  Ralaen stared, speechless. Her own body, trying to destroy itself. Her thick-furred tail, which had been still, gave a sudden, anxious lash against the leg of the chair.

  "I was baffled," Dr. Dubois continued, taking a long sip of coffee. "Until I isolated the sequence the nanites were so desperately trying to install. And then I became… affronted." She looked at Eirik, a fire in her tired eyes. "Do you have any idea what this is, boy?"

  Eirik shifted uncomfortably. "No, ma'am."

  "It's the third-generation Longevity Treatment," she said "Most people call it Ieunn's Gift", her voice dripping with a mix of reverence and indignation. "The single greatest achievement of human medical science. And your internal system was trying to clumsily staple it onto Ralaen's DNA without her consent."

  Ralaen looked at Eirik, her triangular ears flattening back against her skull. "Ieunn's Gift?"

  Dr. Dubois gestured to her own face, a flicker of clinical detachment in her tired eyes. "It's a longevity treatment. Slows the aging process to a crawl. Extends the lifespan to three centuries. I was part of the team that refined it." She then gestured to her own face again, a hint of wry self-assessment in her expression. "I'm a first-generation recipient. It freezes you in your mid-forties. Crude, by our standards now." She pointedly looked at Eirik. "Third-generation recipients... they're frozen in their late twenties. It's why he looks so young."

  The room was silent. Ralaen turned to Eirik, her mind racing. Late twenties. He looked her age. But he wasn't. He wasn't an Asuari. He wasn't even her age.

  "How old are you?" she asked, her voice a quiet, strained whisper. The short, black fur on her arms began to stand on end, a primal response to the dissonance.

  Eirik wouldn't meet her gaze. He stared at the floor, his jaw tight. "Forty-one," he mumbled.

  Forty-one. He was old enough to be her father's younger brother.

  She stared at him, waiting for the correction. The sheepish grin, the "just kidding." It didn't come. He still wouldn't look at her.

  The age gap shouldn't have mattered, not for an Einherjar, but it felt like a fundamental betrayal. He wasn't just her mate; he was an alien, a member of a short-lived species who had artificially extended his life, and his very biology had tried to hijack hers.

  What else haven't you told me?

  The thought was cold and sharp, cutting through the warmth of the bond she'd felt so certain of just days ago. "She'd given herself to him completely, body and scent and soul, and he'd been keeping this. Holding it back. Letting her believe they were equals when he had two decades of life she knew nothing about."

  Her ears pressed flat against her skull. Her tail went rigid, motionless. She didn't trust herself to speak.

  "I couldn't figure out why the nanites would do this," Dr. Dubois said, her voice cutting through the silence with deliberate clinical detachment. If she noticed the temperature in the room had dropped ten degrees, she didn't acknowledge it. "They're an immune system. Why would they try to apply a longevity treatment? Then it hit me. They aren't just an immune system. They're a corrective system. They detected his third-generation genome in you during… intimacy. They recognized it as a 'superior' or more 'stable' version of your own baseline biology and tried to 'fix' you. They were trying to upgrade you. The 'heat' was a catastrophic side effect of the upgrade failing."

  She took a deep breath. "So I spent the last twelve hours doing what the nanites couldn't. I designed a custom Ieunn's Gift treatment specifically for your Asuari genome, integrating with the unique markers of your Ascension. It's not a patch. It's a solution. It will stop the systemic failure, stabilize your biology, and give you the same three-century lifespan he has."

  Ralaen just stared at the doctor, her bright sky-blue eyes wide with a storm of emotions. Her body had been trying to tear itself apart because of him, because it wanted to be more like him. And now, this tired, brilliant woman had given her a gift she never knew she wanted, a gift that would make her more like him anyway. The irony was suffocating.

  "It will also make you biologically compatible," Dr. Dubois added, a wry smile finally touching her lips. "So you can remove your temporary restriction. Now, if you'll excuse me, I'm going to go sleep for a week.”

  Dr. Dubois led them to a small, private treatment room. The air was cool and smelled of sterile cotton. She gestured toward a reclined medical chair, its surface worn smooth by countless patients. Ralaen sat, her movements stiff. Her tail was curled tightly around the leg of the chair, a thick, black-furred barometer of her anxiety. Eirik stood near the door, not beside her. He'd tried to take his usual place at her side when they entered, but she'd shifted away without a word, and he'd understood. He hadn't said a word since admitting his age. Neither had she.

  Dr. Dubois moved with an economy of motion that spoke of her exhaustion. She prepared a hypospray, loading a small, amber-filled vial into the chamber. "This is the synthesized vector," she explained, her voice raspy but clear. "It contains the custom Ieunn's Gift sequence I designed for your genome. All I have to do is introduce it into your bloodstream. Your internal system, the bio-nano machines, will do the rest. They'll recognize the vector, unpack the genetic data, and apply it.

  She swabbed a spot on Ralaen's arm, the cold antiseptic making her flinch. "It will be over in a moment. You may feel… a warmth. A sense of settling. That will be the conflict in your body resolving."

  Ralaen looked at the hypospray, then deliberately at the far wall. She didn't look at him. "Do it," she said flatly.

  Dr. Dubois glanced between them, a flicker of something unreadable crossing her exhausted features, then pressed the hypospray against Ralaen's arm. There was a sharp hiss, a brief, cold sting, and then it was done.

  For a second, nothing happened. Ralaen was about to ask if it had worked when a sensation bloomed inside her. It wasn't a jolt or a shock, but a deep, spreading warmth that started in her chest and radiated outwards through every limb. It was like stepping out of a cold night into a perfectly heated room. The frantic, high-pitched hum that had been vibrating under her skin for weeks simply… stopped. The constant, low-grade panic that had been her companion faded into a profound, resonant calm.

  She took a deep breath, and for the first time in what felt like an eternity, the air filled her lungs smoothly. The scent of the med bay was no longer an assault; it was just a scent. Her shoulders, which she hadn't even realized were perpetually hunched around her ears, relaxed. She felt the tension drain out of her spine, out of her tail. The thick fur uncoiled from the chair leg and settled on the floor with a soft, heavy thump.

  A wave of dizziness washed over her, and she swayed in the chair. Eirik moved instinctively, his hand reaching for her shoulder, but she steadied herself against the armrest before he could touch her.

  "I'm okay," she said. The words weren't for him.

  Dr. Dubois watched the readouts on a nearby monitor, a flicker of professional satisfaction in her tired eyes. "Cellular degradation is arrested. Hormonal levels are stabilizing at a new baseline. The treatment is taking hold. Perfect." She disposed of the hypospray and peeled off her gloves, the gesture final. "You're free to go. I recommend you take it easy for the next twenty-four hours. Let your body finish recalibrating."

  Ralaen stood on her own, ignoring the hand Eirik offered. She felt… different. Not weaker, but calmer. More centered. The frantic energy was gone, replaced by a quiet, settled power. It didn't erase the cold knot sitting in her chest.

  She looked at Dr. Dubois, meeting the doctor's grey eyes directly. "Thank you."

  Dr. Dubois gave a rare, genuine smile. Her gaze flickered briefly to Eirik, then back to Ralaen, a knowing glint in her tired eyes. "It was my pleasure, Ralaen. Go live your new, very long life." She paused. "Both of you."

  Ralaen didn't respond to that. She walked toward the door without looking back to see if Eirik followed.

  They walked out of the med bay and into the corridor, the ship's familiar thrum now a comforting, distant rhythm instead of an intrusive vibration. They walked in silence, a careful arm's length between them. A distance that had never existed before.

  Finally, they stopped outside their quarters. The door remained shut. Ralaen turned to face him, her bright sky-blue eyes hard and searching.

  "Forty-one," she said. It wasn't a question.

  Eirik flinched as if struck. "Ralaen, I am so sorry. I should have told you. I was a coward. I thought… I thought you'd see me as too old. As some kind of fossil."

  "So you just let me believe we were the same," she said, her voice flat. "Let me think I knew who I was mating with."

  "You do know me—"

  "Do I?" Her tail lashed once, hard. "Twenty years, Eirik. Twenty years of life I know nothing about. Who were you before me? What did you do? Who did you love?"

  "You think I wanted this?" His voice was rough, sudden. "You think I enjoyed watching you suffer for three days, knowing it was my fault? Knowing that if I'd just told you—"

  He stopped, his jaw tight. His hands were clenched at his sides.

  "I had eleven years as an adult before I met you, Ralaen. Eleven years of service, of deployments, of watching squadmates pair off and build lives while I just... kept moving. Kept telling myself I didn't need it." His voice cracked. "Then I met you in Jaeger school. And you didn't ask about my service record or my history. You just saw me. And I let you keep seeing that because I didn't want to be the guy with eleven years of nothing to show for it."

  His eyes were bright, too bright. "I wasn't hiding my age because I thought you'd think I was old. I was hiding it because I didn't want you to ask what I'd been doing with all that time—and have to admit the answer was waiting for someone like you."

  She stared at him. The anger was still there, coiled tight in her chest. But beneath it, she felt something else. The bond, pulling at her. The scent of him, even now, doing something to her hindbrain that she couldn't fully control.

  "There's something wrong with both of us," she said finally. "We're Einherjar. That's the whole point."

  A choked sound escaped him. Not quite a laugh, not quite a sob.

  She didn't move toward him. Not yet. "I'm angry," she said, and the admission felt like releasing a breath she'd been holding for hours. "I'm angry that you didn't trust me. I'm angry that my body decided to tear itself apart because of something you kept from me. I'm angry that I had to find out like this, in a med bay, from a stranger."

  He nodded, accepting it. Not defending himself. Just... taking it.

  "But I'm not leaving," she continued, quieter now. "Because my body chose you, Eirik. My hindbrain, my instincts, whatever ancient thing lives in my blood—it looked at you and said him. And I don't think it was wrong."

  She took a step closer. Then another. Close enough to touch, but not touching.

  "No more secrets," she said. "I mean it. If we're going to do this—if we're going to be a pack—I need to know who I'm running with. All of it. The twenty years. The people who didn't stick. Everything."

  He met her eyes finally, and she saw the fear there. The same fear she'd glimpsed when he'd pinned her to the bed and claimed her. Fear of losing her.

  "Everything," he agreed, his voice thick. "I swear it."

  She studied him for a long moment. Then, slowly, she reached up and placed her paw-hand against his cheek, her claws carefully retracted. He leaned into her touch like a man who'd been drowning and had just found air.

  "We're going to be okay," she said. It wasn't quite forgiveness. But it was a start.

  She leaned in and kissed him. It wasn't the frantic, claiming kiss from before, and it wasn't the easy affection they'd shared in simpler days. It was slow, careful. A question more than a statement. Are we still us?

  He answered by pulling her close, one hand sliding to the small of her back, the other cradling the base of her skull. He kissed her like she was something precious he'd almost lost. When they finally broke apart, his forehead rested against hers, his breath warm on her muzzle.

  "I'm sorry," he whispered. "For all of it."

  "I know." She let her eyes close, breathing him in. His scent was still right, still the thing her hindbrain recognized as home, even through the anger and hurt. "You're going to make it up to me. Starting now."

  A shaky exhale escaped him. "How?"

  Her ears twitched, the first hint of her old self surfacing. "You're going to tell me everything. All eleven years. Every boring deployment, every failed fling, every embarrassing story you never wanted anyone to know." She pulled back just enough to meet his eyes, a small, tired smile tugging at the corner of her muzzle. "And then you're going to hold me until I fall asleep. Because I'm exhausted, and I'm still mad at you, and I don't want to be alone tonight."

  He let out a breath that was almost a laugh. "I can do that."

  "Good." She took his hand, the first time she'd voluntarily touched him since the med bay, and palmed open the door to their quarters. "Let's go home.