Chapter Text
Former Mesopotamia, Now, An Ark on the Sea
Aziraphale paced on the deck of the Ark, wringing his hands as he walked. A minor miracle was keeping him dry, but the sound of the rain on the wood of the ship was unnerving. Still, it was better than the constant noise in the belly of the ship, though Aziraphale did feel bad abandoning Crowley to the din. She’d worked so hard to keep the children safe, and had succeeded in concealing a great deal of them on board the ship. They were tucked away in a forgotten corner of the massive contraption, with an angel and demon keeping a watchful eye over them. The troop of young humans had taken to Crowley immediately, seeing their savior in her fiery hair and serpent-like eyes. Aziraphale had taken a bit more time, but to most of them, any friend of Crowley’s was a friend of theirs. The two had quickly become the sole caretakers of the last children of Mesopotamia, miracling and stealing food for them.
This had all been going on for weeks now, until Crowley had started to squirm more, pacing when she was told to be still. She grew restless, wandering the Ark more freely than she should have, looking for something. It was anyone’s guess what the demon was on the hunt for, but Aziraphale was certain she would find it. The question was whether or not she would be found out by Noah first. The angel shuddered to think it, knowing as well as Crowley should have that the human had been chosen for this task as much for his love of God as for his potential for ruthlessness.
Crowley’s normally-subtle scent had only grown stronger in recent days, though in the dark damp of the bottom of the Ark, it was hard to tell the days apart. That was why Aziraphale had come to the deck in the first place, to try to discern how long it had been raining, and perhaps glean when they would be free of their watery confines. Everything had been dark so far, and showed no signs of lightening any time soon, the angel sighed, trying not to feel disappointed. The soft padding of feet behind him shook him from his reverie, the sound somehow reverberating over the sound of the pounding waves and rain. Aziraphale turned, surprised to see Crowley, her hair wild in the wind, clothes soaked by the rain as she approached him.
“Crowley? What are you doing up here?” The angel called, walking towards Crowley, pace quickening when he saw the flush on her cheeks, and the rapid rise and fall of her chest. Combined with the sharp tang of anxiety in her scent, it was clear something was wrong.
“Angel-” She started, voice sounding strange even to her own ears.
“What’s wrong? Are you ill?” Aziraphale placed his hands on her shoulders, his own minor drying miracle extending to her by now. “Is it one of the children?” His voice was lower now, worried that they had been found. A quick shake of the demon’s head soothed his anxiety, but it returned in waves as her knees buckled. The angel tightened his hold on her shoulders, holding her upright with ease. Crowley panted a bit, slitted pupils almost round with- something almost feral. Aziraphale wasn’t sure he’d ever seen this look in the demon’s eyes before.
“Angel, I need-” Crowley began again, this time cut off by her own high whine. Aziraphale felt his anxiety spiking involuntarily at the sound.
“What is it, my dear?” He murmured, pulling her hot, damp body closer to his chest. “What do you need?”
Crowley seemed to pause for a moment, and Aziraphale noted how abnormally hot her skin was to the touch.
“ You. I need you .” Her voice was a whisper now, body already stiffening, trying to jerk away from Aziraphale, the fear of pushing him away too strong. “Just you, angel…”
Aziraphale’s eyes widen, but he doesn’t let her move away. If anything, his grip tightens, earning a soft shudder from the demon in his arms. He feels her relax again, before pressing a hesitant kiss to her overheated forehead.
“I think… I think I’m going into heat.” Crowley murmurs, voice barely audible to an angel’s ears, let alone to a human’s. The new information sits in Aziraphale’s mind, already making itself at home there. Crowley is an omega. She doesn’t just smell like one for a temptation, or from any perfume. The scent that sometimes winds its way through a crowd, finding the only other celestial being in it every time, the one that’s slowly embedding itself on one of his wraps, that scent is pure Crowley. Not that he minded if her scent permeated his world, he hoped it would cling to the fabric of his clothing long after they got off of the Ark, just so that he could remember their time together here. Playing at being caretakers, perhaps even parents, though it would all end with the flood. “Angel, say something .”
Aziraphale stuttered for a moment, gaze locked on Crowley’s face.
“How… er. That is, what do you need from me?” Aziraphale pressed a gentle kiss to her cheek as he spoke, one hand running up and down the omega’s side. She practically purred in his arms, a slight mewling sound escaping her throat.
Crowley bit back a groan, arms moving up to allow her hands to wind through Aziraphale’s cropped curls.
“Everything. Anything you want to give.” Her answer was fast, and a little too honest for her usual style, but right now none of that mattered. All that Crowley cared about was the maddening pound of her heat, throbbing between her legs, as her desire for Aziraphale grew with each passing moment. All she wanted was him, in any way he would take her, and she told him as much, as their faces both grew pink in the night.
Aziraphale stared at her for several long moments, moments in which the omega fought to stay where she was, to not bolt from the near-palpable presence of her confession. The angel seemed to come to a decision in those moments, could almost feel a shifting in the very fabric of the universe as his own narrowed down quite suddenly to one demon, standing in his embrace. Like an arrow fired from a bow, the alpha surged forward, lips capturing Crowley’s in a heated kiss, full of warring tongues and nipping teeth, and exchanges of hot, panting breaths in between it all. His strong hands wrapped around Crowley's waist, pressing her flush against his body, fingers pressing hard enough that a human would've bruised. Not Crowley. Her flesh was made of sterner stuff than that of a mere mortal, and Aziraphale would have to try if he wanted to mark her skin. By the end of her heat, she would be covered in his fingerprints, small claiming marks left all over her body.
The thought left Aziraphale growling, a low and dangerous sound that was Crowley's only warning before the angel placed his hands on the backs of her thighs and lifted , her legs wrapping on instinct around his waist. If either one had had the presence of mind to think of it, they would have been reminded of a garden, one from long ago- though perhaps not as long as it felt- in which a serpent had wound her way around an apple tree, her strong body hugging its trunk for support. As it was, nobody on the entire Ark was reminded of this scene from long ago, of how tightly a serpent's coils can hold on when gripping to her only safe perch.
"Not up here, my darling." Aziraphale whispered into the shell of Crowley's ear, earning a shudder from the soft kiss of breath over sensitive skin. "It isn't safe for us." Lips met the same skin for a moment, and then they were moving as one, Crowley writhing with desire in Aziraphale’s strong and sturdy arms as he snuck her back into the dry warmth of the belly of the ship.
No human nor animal took note of the pair as they slipped closer and closer toward a room that had only come into existence moments ago, and had only done so to please its future occupants. By rights it shouldn't exist, having never been built into Noah's designs, but nevertheless, the door was there, waiting to be opened. It didn't need to wait for very long, before being miracled open to allow the celestial pair safe entry into their own nest, one that Aziraphale dearly hoped the omega in his arms would approve of.
Crowley was gently lowered onto the nest at the center of the room, a pile of soft blankets and stuffed pillows that had been miracled into existence by the angel above her. Her body felt cushioned and comfortable, and she reclined for a moment before reaching up to pull Aziraphale on top of her.
The alpha grinned, a sharp wicked thing that had no place on his gentle face, before ducking his head down to mouth at a cloth-covered nipple, hand running up and down the demon’s sides, before moving to pull her dress up and slide under it. Once his hand found the hot, smooth skin of Crowley’s belly, Aziraphale’s grin faded to a smirk, as his fingers grabbed her waist, pulling the omega ever-closer. The high keen she let out should have been embarrassing, if Crowley had been able to think about anything other than the vast empty feeling deep inside, or about the only way she knew to fill that void. The angel’s hand gripping at her waist was nice, but still not what she needed.
“Please, angel , you need to move faster.” Crowley managed to command, voice soft and breathless as she cupped the alpha’s straining erection. “Need this…” She whispered, back arching when Aziraphale scraped his teeth over one sensitive nipple. She whimpered, a high tone that shot straight to the angel’s cock, the member twitching in response. His grip on her waist tightened just a bit more, and Crowley knew there would be bruises where his fingers were pinning her body in place. The idea had her cunt throbbing harder than before, slick trickling from her entrance.
Aziraphale captured Crowley’s lips in a kiss, tongues warring with one another, and groaned when the omega nipped at his lower lip, the sensation electric, coursing through his body. The shock of it had him pulling off, earning a whimper from the demon beneath him, the sound making his already hard cock twitch eagerly. She felt bereft without his mouth on hers, the wet heat of it a balm for her lust-filled brain. He quickly moved down her body, kissing a trail down her neck, and with a snap of the fingers he miracled her dress away, before continuing to kiss, nip and suck his way down her torso, only pausing for a moment to give each nipple the attention it deserved.
Crowley was a writhing mess beneath him, and in her ecstasy almost missed when one of Aziraphale’s hands snuck between her thighs, gently stroking the tender skin of her left thigh. Her hands twisted into blonde curls, giving the alpha's hair a soft tug, one leg hooking behind his back. He glanced up at her, face mere inches above her belly, looking for approval to go lower. A soft plea did the trick, and with growing anticipation Crowley could only watch as her angel settled between her thighs, and with eager enthusiasm began kissing and suckling his way up from her thigh. Even though she had known it was coming, the feeling of his mouth on her clit had Crowley moaning, head thrown back against the nest beneath her.
Aziraphale hummed around the omega's clit, and the vibration of it had her grasping desperately at his hair, legs wrapping tightly around his torso, locking him in place. The angel started to suck, before slipping a finger easily into her slick cunt, curling it slightly to stroke her walls. The fingers entwined in his hair tightened their grip to be just the right side of painful, and he slipped another finger inside of the omega, pumping out a steady rhythm with his hand. He spared a thought for his own arousal, eager to know what it felt like to be buried to the hilt inside Crowley's wet cunt. For now though, he focused on pushing the omega over the edge, into what would be the first of a great many orgasms throughout her heat.
As Aziraphale quirked one of his fingers inside of her, Crowley could feel her orgasm approaching, like a wave about to crash down on top of her. A quick scrape of his teeth over her clit was what sent her over the edge, screaming Aziraphale’s name as she came, slick pouring out of her and into the angel's waiting mouth. He lapped up the liquid, cleaning her quivering pussy eagerly.
Crowley's vision blurred, her mind somewhere in the Earth's upper atmosphere, vaguely aware that she had a body, and that it was being tended to by her alpha- if she could even claim him as hers. As she floated back down to earth, she became aware of one of his hands slipping away from her thigh. With a soft mewling sound that she would later deny, she gave his hair a questioning tug.
"Just, uhm. Just taking care of my own-" Aziraphale blushed and stuttered as he explained, only endearing himself further to Crowley. Wordlessly, she tugged at him to get the alpha to move up her body again.
"Angel, if you don't stick that massive cock inside me right now , I'll have you on your back sooner than you can think it, and I'll do it myself." Crowley's growl made Aziraphale shudder, and he pressed a kiss to her collarbone.
"I wasn't sure if you wanted-"
"I want you ." The omega reiterated, feeling a bit more lucid now, her post-orgasm glow dimming her heat for the moment. "And right now I want you to fuck me with that beautiful cock, and when you finish I want you to fill me up with your cum. Okay?"
Aziraphale grinned hungrily, claiming her mouth with his own as he lined his cock up with her still-quivering entrance.
"Anything for you, dearest." He whispered, sliding into the tight heat of Crowley with ease. He felt her clench around him, heard her moan his name in his ear. The sound had him thrusting, a quick experimental thing. Crowley let out a high keening sound, and Aziraphale knew he'd done something right. It took two more gentle thrusts to ensure he had the right angle, before the motion became faster, firmer, more desperate. The angel began pounding into the omega beneath him, encouraged by the litany of sounds pouring from her mouth as he did.
Neither of them lasted too much longer, Crowley being pushed to another climax by the steady, punishing pace Aziraphale had set. She could feel his rapidly swelling knot getting caught at the outer edges of her cunt, relishing the thought of it being nestled inside of her.
It took almost half a dozen more thrusts before Aziraphale buried himself for the final time, knot locking the pair together as he spilled his seed into the omega. Her walls clenched around him, earning a deep groan from the angel. Crowley felt her mind flying apart once again, felt as her orgasm pulled her apart, and as the steady pressure of Aziraphale's cock tied her neatly back together. The alpha could have cried at the feeling, as Crowley's body milked him for all he had, his own climax a tidal wave of ecstasy that the demon was pulling him through.
As they both came back to themselves, Aziraphale collapsed, with just enough presence of mind to roll a bit to the left of Crowley, not wanting to pin her under his body. They both lay there, panting for several moments, still tied together by the alpha's knot. The demon tucked herself as best she could into Aziraphale, hands coming up to pull his head down for a gentle kiss. Aziraphale returned it, and they traded slow, languid kisses as his knot deflated. He finally slipped out several minutes later, rolling onto his back with a pleased groan. Crowley rolled with him, pressing up against his side as he wrapped his arms around her trim waist.
Neither spoke for several long moments, each just enjoying sharing their afterglow with the other. Aziraphale's hand had begun to draw gentle circles on Crowley's hip, just as she had begun carding her fingers through his hair.
"Won't be long before I'll want to go again…" Crowley murmured, something like sheepishness invading her tone.
"I'll be ready when you are." Aziraphale promised, pressing a kiss to the top of the demon's head. She rested a hand on his torso, long fingers drawing lazy designs on his chest.
They lay in silence for a little while longer, before a thought struck Aziraphale.
"Crowley?" He asked, earning only a questioning hum in response. "What have you done with the children? Your heat will last days -"
"Don't worry about them, angel. I left the eldest two in charge, and gave them food and water for a month before I came to find you." Crowley sounded smugly satisfied with herself for this, curling just a bit closer to the alpha. "Not that this'll take that long. Just wanted to be sure they'd have enough."
Aziraphale smiled at the words, the hint of anxiety that had found its way into their nest snuffed out by them.
"I'm quite glad to hear that, dearest. I'm not sure either of us will have the time to tend too heavily to them for the next week or so…" His smile remained, though it turned a touch lascivious, his gaze raking up and down Crowley’s lithe body hungrily. Crowley shuddered under the alpha’s intense stare, ducking her head into the crook of his neck.
"We've got all the time in the world, angel." The demon murmured, languid as she basked in the afterglow like a snake on a sun-warmed boulder. "And I'm ready when you are." She finished with a smirk, hand moving to cup Aziraphale's cheek. The angel raised his eyebrows, nearly surprised by Crowley's admission.
"Already?" Aziraphale balked, thoroughly enjoying the confused look on the omega's face.
"Of course already, you daft angel!" Crowley cried, swinging her leg over to straddle Aziraphale's hips. She dragged her dripping cunt down along his stomach until he grabbed her hips, squeezing hard to keep her in place.
"Not yet." The angel commanded, earning a shudder as he only response. "Lay with me for a moment longer." His voice softened, and Crowley paused, before silently acquiescing to his request. She lay her head down on his chest, torso moulding to rest along Aziraphale’s own.
They lay they for a few more minutes before Crowley's heat got the better of her- she'd never been good at patience, anyway, even before her Fall. Her hips rocked of their own accord, Aziraphale began rising to meet her, and, at least for Crowley, all was as it should be.
Crowley's heat lasted for almost a full week after that, a week spent wrapped up in bliss, a great escape from the torments of the flood. Aziraphale took better care of the omega than she ever had imagined- and she certainly had imagined. When it was all over, in the privacy of her own mind, she finally admitted to herself that she could never truly belong to anyone but her angel. Aziraphale’s gentle dominance and quiet strength endeared her to him, and his continued care had sealed the deal. She knew even as they left the Ark that they had been changed, knew it as they found places in the world for the children they'd saved, knew it as they finally parted ways, not to see each other for centuries, maybe.
Indeed it would be centuries before Crowley and Aziraphale would meet again, in another time, with new humans and new orders. Centuries before which the angel's only parting gift had been deep purple bruises on Crowley's thighs, and a blissful soreness between her legs. Nothing more than that had been considered, but Crowley still felt branded, claimed by those temporary marks. more permanent than the alpha had realized they could be. In the days as they faded, Crowley allowed herself to imagine a bruise of another nature on her neck, one on her scent gland, surrounded by the mark of the angel's teeth.
After they parted, after the last child of Mesopotamia had found a new home, Aziraphale had said his goodbyes, leaving the mock family he'd had with Crowley behind. He had wanted to say more to her, to do more with her, but it hadn't been the time. So he'd walked off, leaving her to turn and walk the other way, and kept walking until he couldn't even smell the omega. During the long nights that followed, he fantasized about lush red curls, of a thin body draping over his own as the demon it belonged to snuffled lightly in her sleep. He thought about her long neck, still unmarked by anyone, including Aziraphale.
The angel suddenly knew with absolute certainty that although it was the first, this would not be the last time he and Crowley parted this way, with hasty goodbyes after tender stolen moments together. In that moment, Aziraphale knew he was done for, could never go back to Heaven and their cold practicality, not after he'd bitten into his own proverbial apple. No, just then, he knew that he would chase the warm enigma of Crowley for the end of his days if he had to, even if she stayed forever out of his reach. Just then, Aziraphale knew he could never truly mind such a fate, as long as he got to spend his time on Earth with his demon.