Reminder: Alpha! Werewolf! Dean and Omega! Human! Castiel

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Edited 1/15/23: Updated tags- Omegaverse. Dean is in anthropomorphic wolf mode for all of this. Werewolf-on-human penetrative sex. Knotting.

Castiel wandered in and out of moonlight let into the nursery by open blinds. Fortunately werewolves didn't have to worry about Moon Fever until after they presented, typically the same time when they hit puberty. This was also when they would discover their second gender. Until then he and his mate were just happy knowing they had a healthy baby girl. Beckett was growing quickly, as he was told was normal for werewolves. She ate as much breast milk as he could give her, supplemented with formula on days when she was particularly hungry. Despite the fact she was eight months old she was able to sit up on her own already, was the size of a human child nearly twice her age, and had taken her first steps today. Castiel worried sometimes, having been unprepared for just how different a werewolf baby was from a human one, but since she'd started sleeping through the night at six months he worried a bit less.

Beckett was finally settling down, her head lolling on his shoulder as she finally fell asleep. Relieved, Castiel gingerly lowered her into the crib, backing out of the nursery on tiptoe. Once he was out he pulled the door closed, hurrying downstairs. He grabbed the baby monitor as he went, turning it on and ducking into their bedroom. He stripped off his clothes as fast as he could then shrugged back into his trench coat, tying the belt around his waist. Picking up the baby monitor once more he padded out of their bedroom and across the living room, opening the front door.

The Omega bent to set a currently quiet monitor on the doorstep once the door was closed, then straightened to face his mate. Dean was pacing in the sprawling yard surrounding their isolated cabin, supposedly having already been on a run to blow off steam. He was down on all fours, on edge. It grated on his instincts, Castiel knew, to be away from a new pup and his mate for any length of time. Technically Moon Fever only hit once moonlight touched them, so if both parents were werewolves one would always have to hide away to care for the pup, but it wasn't a good idea to suppress the change too often. The less often their primal wolf natures were let out, the less control they had over it. Dean had actually put off changing for three whole months once Castiel had started to show, but then the Omega had refused to let him into the cabin one night, forcing him to change. He loved his mate, trusted him, but Dean's wolf had been getting too violent, too territorial.

Since then they'd agreed Dean wouldn't suppress his changes unless it was necessary, but that didn't mean the Alpha wasn't on edge for a different reason. No sooner had Castiel straightened then Dean was on top of him, yanking him off the ground with both arms wrapped around the Omega, sniffing him from head to toe, a questioning whine in his throat.

Castiel gave a quiet sigh, reaching up to stroke his fur reassuringly. "She's fine, Dean. I just put her to bed. She won't wake until morning."

Dean relaxed a little at that. Wolf Dean was less rational than Human Dean, but that didn't mean he couldn't be reasoned with, within limits. It would be difficult for him to get to the second floor in this form, and even if he could there wasn't much he could do. It made the Alpha a bit edgy, but nothing Castiel couldn't deal with. Unfortunately during the last Moon Fever Dean had become less interested in hunting and pacing around the house. Less than a year after Beckett's birth the Omega's body was ready to breed again. Castiel hadn't realized just how potent Dean's protective instincts could get until he had both an infant pup and a fertile mate under one roof. He'd come outside to meet him last Moon Fever and gotten knocked off his feet when the Alpha shoved him back inside the cabin, a warning rumble in his throat as he yanked the door shut. Once assured his mate wasn't trying to leave, he'd settled down enough to bend the Omega over their couch and fuck his brains out. Honestly Castiel had been amazed the racket hadn't woken the baby.

This time Dean was a bit calmer, enough to nuzzle his mate's neck, a pleasant thrum in his throat. Castiel smiled, absently brushing his fingers through warm fur. Clawed fingers brushed his trench coat, pawing meaningfully at the fabric. Obediently Castiel undid the belt, letting his mate nudge the coat from his shoulders. As the rough fabric pooled at his feet Dean sniffed him up and down, the growl taking a lustful turn. Castiel had heard it too many times to mistake it for anything else.

The Omega sighed quietly, then leaned up to drape his arms over his mate's shoulders. "I'm yours," he murmured simply.

Dean outright growled at that. It wouldn't be every Moon Fever, especially now that they were starting a family, but whenever Castiel was up to it they would...indulge. He was tired, yes, but not so tired he'd keep the Alpha at arm's length tonight.

Castiel gasped as he was shoved back against the cabin, furred arms hooking under his legs to hoist him up. He wrapped his own arms around the werewolf's shoulders, tangling his fingers in thick fur. He had moments to brace himself before he was lowered down, a keen in his throat as he buried his face in Dean's fur. The werewolf's growl intensified all the more as he sank balls deep into his mate, apparently enjoying the trickle of whimpers this elicited from the Omega.

Already wet, Castiel knew he was dripping slick by the time Dean was fully inside him, breath coming in sharp gasps. It was well worth having the rough side of their house against his bare back, having his mate fill him, claws digging into the flesh of his thighs but not breaking skin, a cool wet nose buried in his neck, the heady scent of Alpha wolf musk swamping his head...oh gods it was intoxicating.

"Dean," he whimpered, the word drawn out.

The Alpha's tongue, hot and rough, lapped lazily over first one nipple, then the other. Castiel gasped, head falling back, tightening his grip on his mate. Dean shifted his grip, moving one hand to brace just over the Omega's shoulder as he drew out only to slam back in again. Castiel cried out, then bit his lip, eyes flicking over the baby monitor. Still nothing. Oh gods he hated having to keep quiet. It wasn't easy, especially when Dean was in this state of mind. The louder he could get his mate to voice his pleasure the more he enjoyed it.

"Al- Alpha- Alpha, please," the human gasped, tightening his arms to take the pressure off claws now digging into his buttock. This made it easier to lean up, nuzzling one erect canine ear. "Fuck me, mate."

To say the werewolf obliged was putting it lightly. If Dean hadn't already positioned his hands to keep Castiel in place the Omega would have been driven up the side of their house by thrust force alone. Within seconds Castiel gave up, burying his face in Dean's shoulder to smother his cries.

Just as the Omega was almost to the edge he was hoisted off his mate's cock. He didn't even bother trying to cover his wordless, dismayed protest. It was followed by a whimper when his mate growled a warning, setting him down on the soft grass in the moonlight. Castiel grimaced as his already tender back made contact, but the werewolf was already shoving his legs aside and hoisting his hips up. The Omega's head fell back, the moon coming into full view as his mate pushed back into him, resuming his rough pace. Why Dean had made this change he had no idea, but considering this new position resulted in Castiel getting his prostate rammed with every thrust he was hardly complaining.

The Omega clamped a hand over his mouth, the other fisting in Dean's fur, but a clawed hand pinned his wrist to the grass. Castiel whimpered, biting his lip, then gasped as a rough hand wrapped around his aching cock. His eyes screwed tightly shut, mouth falling open in a voiceless wail.

Dean went over the edge first, slamming home one last time, a snarl in his throat as his cock pumped his mate full of cum. The Omega climaxed before he was done, not bothering to smother his quiet scream of ecstasy. His eyes fluttered shut, body going limp as the Alpha slid out of him with a decidedly wet sound. The wolf was panting as he loomed over Castiel, chest pumping like a bellows.

Clawed fingers caressed the Omega's cheek, and cobalt eyes flickered open. He made a questioning noise, not putting up a fuss as he was rolled onto his side. Dean curled around him, settling with his head resting on the Omega's belly. Rough finger pads idly stroked his hip, occasionally brushing the crack between his buttocks. Castiel grimaced a little, but the werewolf seemed to enjoy it. Even without a knot the Alpha expelled more cum in this form, enough that it would be leaking out for a little while if left alone.

Castiel was fully resigned to sleeping out here like this, closing his eyes and resting his head against Dean's chest, listening to the werewolf's heart. It was still pounding at first, but gradually it began to slow. He settled a hand in Dean's fur by his ears, gently stroking the soft tufts as he began to nod off.

The Omega was just below the surface of sleep when a sound jerked him awake again, his eyes flying open. Dean's ears snapped forward at the sound, both of them lifting their heads. Castiel struggled to get up, and at first the Alpha's body tightened around him. He whimpered desperately, struggling against both a weakened set of muscles and a bigger mate to get back to the house. The lights on the baby monitor were flaring as cries came through the speaker. Beckett was awake. She was crying. He needed to get to her.

Abruptly Dean uncoiled from around him, pushing him onto his feet. Castiel barely remembered to grab his trench coat before hurrying inside, jamming his arms into it as he hurried up the steps. Beckett, as it turned out, just needed a change. Once that was done it didn't take long to get her to sleep again, not even ten minutes of walking and bouncing around her room, crooning lullabies.

For the second time that night Castiel put his daughter in her crib and slipped out of her room, padding back down the stairs. He was initially going to get cleaned up and go to bed, he still had cum trickling down his legs for pity's sake, but as soon as he was back on the first floor a low rumble reached his ears. The Omega stopped, hesitating. Dean was on the other side of their front door, waiting.

Sighing quietly, Castiel went to pull it open. "She's fine, she just needed a change."

He was about to go back inside, prepared to leave it at that, but Dean slid one furry arm around his waist and pulled him back outside.

"What are you- "

His protest was cut off as the Alpha swept him up, almost ripping through his trench coat as he shoved him belly down into the thick grass ten feet from the house. Out in the open, in broad moonlight. One clawed hand pinned his shoulders to the ground, the other hefting his hips into the air. It was the only semblance of warning he got before the werewolf was pushing inside him again.

Castiel yelped, more from surprise than pain. Dean hesitated, but then continued when the sound was followed by a moan of pleasure. The Omega closed his eyes, any thought of protesting forgotten. He was tired, even more now than before, but it was very difficult to argue with a horny Alpha werewolf. Particularly when said horny Alpha werewolf already had their sizeable dick inside you. There wasn't even the brief discomfort as he adjusted since this was round two.

That said, it did occur to him that his mate might very well be trying for a knot. Regardless of how horny he was one round was usually enough when he was in the middle of a Moon Fever, after that he was typically content to curl around his mate and doze with his muzzle in Castiel's neck. He couldn't exactly protest now, and while they hadn't discussed whether or not they'd try for a second child they had agreed some time ago to try for multiple kids. Running numbers wasn't easy when you had an enthusiastic werewolf with an impressive cock attempting to fuck your brains out, but he managed. Assuming they got lucky and this knot did the trick that'd give them a year and a half of difference. Castiel would have preferred two years or so, but he could live with a year and a half and oh gods that felt incredible.

"Dean- Dean, Alpha, please, please, don't-don't stop, feels so good mate...fuck me, knot me, please mate, please knot me- ah!"

Attempts at speech were unsuccessful after that. Castiel was too busy trying not to scream outright, for fear of waking the baby. His hands scrabbled for purchase in the thick grass, fingers digging into the dirt and clawing into the ground. The hand bearing down on his shoulders tightened so much he felt multiple stings as the claws broke skin, his ribs protesting as more pinpricks dug into his hip. His own breath rasped loudly in his ears, blood roaring in them, almost drowning out the repetitive wet smacking as his mate maintained a punishing pace. Castiel couldn't believe the idea had once terrified him, the idea of having an oversized anthropomorphic wolf looming over him, screwing him with an equally oversized cock. Even now he pushed back into it as much as he could, keening and moaning as loudly as he could in hopes of urging his mate on faster, harder.

When the end did come Castiel stuffed his own arm into his mouth, muffling a scream as he came hard on his Alpha's cock, feeling his inner walls clamp down hard as his own cock spurted cum into the grass. Behind him, a guttural half snarl half howl came from Dean's muzzle. A spark of savage pleasure stirred in Castiel's chest, at knowing even now he could do that to his Alpha.

That thought was soon forgotten as his wavering vision settled, just in time for an outright howl to reach his ears. Castiel gasped, sucking in a deep breath as Dean came hard. He was surprised to find he could hold still this time, something he'd never managed before. It still hurt, having a knot swell inside his still clinching hole as copious amounts of cum spilled inside him, but he wasn't fumbling to get away. He'd never done so successfully, but Dean had always had to restrain him for the knot.

Castiel closed his eyes, letting his body fall limp in his mate's iron grip, trying to relax his inner muscles and just holding on for the ride. Cramping pain gripped the lower half of his abdomen, his fingers digging deeper into the dirt, but he didn't move.

A hot, rough tongue slowly lapped at the back of his neck once the knot was secured, Castiel slowly relaxing as the pain eased. The Omega hummed, eyes drifting closed as clawed fingers stroked his hair, a chilled nose nuzzling his neck. He felt completely drained, unsteady down to his bones. It was a wonderful feeling he never got tired of. Even if Dean would have to carry him to bed. If they ever got to bed.

The mass of hot fur at his back settled over him, Dean sighing contentedly. Castiel mourned the knot when it eventually faded, another first. If he wasn't so zapped he might have been tempted to ask for round three. What was wrong with him? Not that it was a bad thing, but why the sudden change?

But he wouldn't be getting an answer tonight. So he settled down, fully prepared to sleep out on the grass with his mate curled around him. There were certainly worse ways to spend what remained of the night.

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