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“Sooo,” Sonic said, shifting his weight and wringing his hands awkwardly. “You, uh… you mentioned once, a little while ago, um…”
“Out with it, hedgehog,” Shadow said. He was not in the mood for conversation—he had his next cycle coming soon, after all. At the present moment, Shadow was standing in their shared bathroom, Sonic leaned against the doorway, trying to look as aloof and nonchalant as possible.
“You said that, uh, well, ‘cuz of your part-alien biology, you lay… eggs.”
“Yes.”
“Well, I was just, kinda curious… Y’know, a t-totally normal amount of curious, I mean,” Sonic watched as Shadow walked across the bathroom and grabbed a toilet plunger from the rack on the far wall. “What, um. What do you do with them when you, uh, lay ‘em? I haven’t ever seen any eggs around the house before. Except for the grocery store eggs, I mean. The ones we buy. From the store. And put in the fridge.”
“I flush them,” Shadow said flatly, gesturing with the toilet plunger.
“Oh,” Sonic breathed.
“The eggs can only survive if they have a host to incubate in. If they’re flushed down the toilet, they’ll wither away and die.”
“I—I see.” Sonic fidgeted, green eyes glued to the floor. “Can I, um. See one?”
“Not right now, moron,” Shadow grumbled, “They haven’t come yet.”
“Yeah, yeah, I know, but like, when they do—”
“Hmph,” Shadow grunted. It was a little weird, but his partner was curious, and he knew all too well that Sonic wouldn’t give up on nagging him about it until he got what he wanted. “Whatever, sure.”
And that’s how he ended up with his husband standing behind him with gentle peach-furred hands on Shadow’s waist, gazing over Shadow’s shoulder later that evening as he laid his eggs into the toilet. It took everything in his power not to slam Sonic into the wall and fuck him, as his biology so desperately wanted to find a home within which his eggs could thrive.
Sonic jerked him off, at least—something Shadow usually just did himself. The ebony hedgehog leaned his head back so it rested upon Sonic’s shoulder as Sonic pumped his hand up and down Shadow’s length. He was much longer and thicker than the average Mobian, mostly due to the fact that he needed to use said member to deposit eggs.
When Shadow reached his climax, the eggs came, and one by one they fell rather unceremoniously into the toilet with a rather disgusting splash.
It totaled out to six, this time around.
As Shadow cleaned up, Sonic reached into the toilet and gingerly grabbed one, cradling it delicately in his hands. “Do you always lay this many?”
“Meh, this cycle was on the light side.”
Shadow flushed the toilet, grabbing the plunger and keeping it at the ready for the inevitable moment that the plumbing struggled to keep up with the strange intruders.
The egg in Sonic’s hand was moderately sized—large enough that Sonic could cup it in his palm. It was gelatinous in nature, squishy and wet, causing the blue hedgehog to shudder a little bit at the texture against his hand. He poked it with his finger and watched it jiggle.
“And… How often do you lay them…?” The hero asked, and Shadow sighed.
“Every four months.”
Sonic squeezed the egg a little. He poked and prodded it; and Shadow almost missed the soft blush that dusted Sonic’s muzzle. The Ultimate Lifeform sighed, shoving the plunger into the toilet bowl and pumping it a couple times until the toilet flushed the rest of the way.
When Shadow was cooking breakfast the next morning, Sonic sat at the table and tapped away at his phone. He was quite intent on it, and Shadow wondered what had captivated his attention.
“So, um,” Sonic said, “Totally theoretically, if your eggs were laid in a host, what would happen?”
“Like I said yesterday, they’d incubate.” Shadow said, flipping the omelet he was cooking, “They soak up the host’s DNA, fertilizing them, impregnating their host.”
While the omelet cooked, Shadow chopped up some tomatoes and an avocado. “Why do you care so much?” Shadow asked, eyeing Sonic, who immediately stiffened and shifted awkwardly in his seat.
“Oh, uh, n-no reason,” Sonic laughed, “Is breakfast almost done?”
“Another minute or so.”
Sonic went out on a run later. He left his phone out on the kitchen table, so Shadow picked it up; it was a breach of Sonic’s privacy, sure, but he’d been acting… strange, lately. He had a feeling something on his phone, which he’d been quite obsessed with that morning, would give him a clue.
He knew Sonic’s password by heart—Sonic trusted him enough to give him that information, should he ever need to access it for some reason. Though, that was more of an “In case of emergency” type thing, a category in which this situation did not apply. He quickly unlocked the device, to find that the calendar app was open. Though, he noticed immediately, it was not open to today’s date, nor anything in the near future—no, it was open to May, a date exactly four months from yesterday was marked.
He opened the event that Sonic had created. It had no specific times listed, so it wasn’t any sort of appointment; and it had notifications set for two weeks before, a week before, and the day before.
Its title was vague enough that anyone who saw it wouldn’t understand what it was, but Shadow knew perfectly well what it meant.
eggs?
Sonic had been quite fascinated by this biological process; weirdly so. The Ultimate Lifeform brushed it off as being a simple curiosity over the parts of his DNA that were inherited from the Black Arms. Shadow exited out of the calendar app and looked at what other apps Sonic had open— his notepad app was next, so he peeked at that to find that Sonic had written down all the information Shadow had disclosed about his cycle. How often it happened, what the eggs looked and felt like, how many he laid. There were notes on what Shadow described would happen if they were laid inside of a host, and on the following line:
Gestation period: ???
Shadow smirked. He went ahead and deleted the three question marks, replacing them with the answer, for Sonic to stumble across later.
Next was the internet browser. A Q&A website was open. An anonymous asker had posted at 2am that morning, “My husband lays eggs. Is it weird that I find that hot?” The answers to the question were more or less along the lines of “Go see a therapist,” or “You’re definitely a weirdo,” or “Mobians don’t lay eggs, what the fuck?”
The front door opened and Sonic walked inside, drenched in sweat. Shadow quickly set Sonic’s phone back down, backing away from it in hopes that he didn’t notice he’d been snooping around.
“How was your run, darling?” Shadow asked, tossing Sonic a hand towel to wipe the sweat from his brow.
“It was good!” He said with a happy grin, “Twenty laps around the island, in record time.”
He spotted his phone on the table.
“Oh!” Sonic exclaimed, “I’m so sorry, Shads, I know you hate it when I don’t pick up after myself—”
“I’m more interested in you taking a shower,” Shadow waved his hand in front of his face teasingly, wafting away Sonic’s post-exercise scent.
“Okay, okay,” Sonic laughed. He snatched up his phone and hurried off.
Months passed and Shadow more or less forgot about the events of those couple of days—but Sonic certainly didn’t. Because before he knew it, as the two of them half-watched a boring TV show as they cuddled on the living room couch, Sonic casually asked him when his egg cycle was happening.
“Very soon,” Shadow said. He was starting to feel the pressure in his gut, the telltale sign that the eggs in there had developed and were ready to be released.
“Y’know, I was just thinking,” Sonic mused, “You don’t look like you’re full of eggs. But then you spit ‘em all out and it’s like, a pretty decent amount?”
“My biology is designed to efficiently store them,” Shadow replied simply.
“So, uh…” He fidgeted a little, “What’s the largest amount you’ve laid at once?”
“Somewhere around twelve, I believe. I don’t really count them.”
“I—I see.”
That night, as he laid down in bed, he estimated the eggs would come by, perhaps even before, morning—the pressure inside him had grown, his body beginning the preparations required to expel the eggs from his system. Under the bedsheets, his member was achingly hard, begging for some form of release, his damn hormones driving him wild.
Sonic stepped out of the bathroom after brushing his teeth and climbed into bed.
But he didn’t cuddle beside him like usual, catching Shadow by surprise. Instead, Sonic straddled him, pressing his lean, muscular body flush against Shadow’s. Heated red eyes met green for a moment, and then Sonic leaned down and kissed him.
Shadow hummed into the kiss, gripping Sonic’s waist. He’d done a good job at ignoring his biological needs to this point, but herein lies the problem: one of the preparations his body made was an increase in sexual drive. The hours leading up to his egg cycle were always so painful and arduous, given how strongly he desired to fuck his husband silly, laying his eggs inside of him, breeding him…
He’d done so well at avoiding it for years, but now Sonic was kissing him, pinning him down into the bed. Sonic’s hips were pressed so deliciously against Shadow’s, and Shadow gripped Sonic’s beautiful, breedable little waist, digging his claws into the supple skin beneath his fur.
He lost all control. He ground his hips up against Sonic, and the hero moaned, juicy and loud.
“I want you to lay your eggs in me,” Sonic gasped.
Before Shadow could even properly process what Sonic had said, he sprung int action, grabbing Sonic and flipping him over on the bed, switching their positions so the hybrid was now on top. Shadow growled, his primal urges taking over as he yanked Sonic’s legs open, shoving his cock into Sonic’s entrance. He showed no mercy, thrusting hard and fast into his husband, who shouted in pleasure. He was already pretty wet, Shadow noted, and he had a feeling Sonic had been thinking about this for long enough prior that he’d gotten himself pretty riled up.
Which was fine by Shadow, because it made fucking him easier.
He adjusted his position, lifting Sonic’s leg up over his shoulder as he slammed himself into his mate. Usually, when they made love, Shadow would start a little gentler, give Sonic time to adjust—but today the alien side took over, clouding his brain. He desired nothing more than to fuck, breed, claim.
“Shadow,” Sonic moaned, panting heavily, “Oh, fuck, Shadow…”
Shadow thrusted harder, faster. He aimed for that sweet spot in Sonic’s pussy, nailing it over and over, making Sonic scream for him.
“Good boy,” Shadow growled. He sunk his teeth into Sonic’s neck, biting and marking him, making sure to leave bruises and marks dark enough to show through that soft blue fur. Sonic whined and purred, leaning his head back to allow Shadow more access.
Then, the first egg came. It worked its way down through Shadow’s ovipositor, leaving the hero wide-eyed and gasping as the lump pushed past his entrance and released deep inside of him.
“Oh—” Sonic moaned, “That’s—Fuck—”
Sonic shifted, adjusting to the new feeling in his body. It felt cold as it latched to his inner walls. But he didn’t have much time to acclimate as the second egg came, finding its home inside of Sonic along with the first. They sloshed around inside of him as Shadow thrusted, and Sonic’s eyes rolled back in pleasure. It was strange, sure, but it felt really, really good.
“More,” Sonic gasped, “I need more…!”
And Shadow was happy to comply—in fact, he wasn’t sure he could stop, even if he wanted to. Not until all his eggs were laid inside their deliciously wet, warm host. Egg after egg, he filled Sonic up, the pressure in Sonic’s belly increasing as the pressure inside of Shadow was relieved. Sonic’s belly bloated to accommodate the intruders, and Shadow couldn’t help but rub it as he filled him up. It was hot, seeing Sonic full of eggs, thoroughly bred and well-fucked. The expression of pure pleasure on Sonic’s face told him everything he needed to know.
When all the eggs had been successfully planted into his lover, Shadow pulled out, gazing down at Sonic.
“Holy hell, Shads,” Sonic groaned, his belly full and heavy with eggs, “That felt so good…”
The haze of post-sex bliss left the two hedgehogs drifting to sleep in each other’s arms.
There were a few… side effects, of being full of Shadow’s spawn.
First of all, Sonic was hungry pretty much constantly, having to now feed ten, perhaps twelve, incubating eggs. Shadow, sick of having Sonic raiding the fridge every hour, bought plenty of bags of potato chips and pretzels for Sonic to snack on instead, so their week’s groceries didn’t get devoured in a couple days.
Second, the hero was sluggish, no longer bolting energetically around the house. It was hard to run with a belly stuffed with eggs, too bloated and drowsy to move much. He wasn’t huge or anything, he simply looked as though he’d eaten a few too many chili dogs. It was quite the strange feeling for Sonic to get used to—he complained quite a lot about how weird he felt with eggs inside him. It felt tight, he’d explained one evening, and every once in a while the eggs would shift around inside of him on their own, weird alien volition, sending sharp chills up the hero’s spine. His muscles felt sore, his energy drained. Shadow purred soothingly into his husband’s ear, gently massaging his body.
So, since he couldn’t quite run anymore, Sonic spent most of his time on the couch watching movies and playing games. Shadow was designated as the one to run the errands—anything from grocery shopping to getting the mail to cleaning the house. After all, Sonic had no interest in moving around; even though he was usually quite hyperactive, Sonic found himself content to laze around. Perhaps something had triggered in his brain, something that told him to conserve his energy so the eggs inside of him could flourish.
Third, his hormones were all sorts of messed up. It didn’t take long after getting accustomed to this new feeling inside him, that he grew rather affectionate for the alien spawn in his gut. He was happy to rub his belly and poke at the lumps that formed here and there. The constant pressure inside of him started to feel good, even more so when the eggs were wiggling and churning around inside of him. And oh, oh chaos, was he horny.
He wanted more. He wanted more eggs inside him, he wanted to be stuffed to the brim.
Any time an egg shifted inside of him, a sharp flare of sexual need shot through him. And, of course, they started to do so quite frequently, making it known that there were living things inside his belly. Maybe, Sonic wondered offhandedly, this was for some evolutionary purpose, to coax their host into taking more eggs.
Most of the time, Shadow wasn’t home. He had his job at G.U.N; which meant Sonic was alone in the house to try his best to handle his situation. Sonic did everything he could to alleviate this need. He touched himself, he rutted against pillows until he came, he shoved anything he could get his hands on inside of himself. His fingers, the TV remote, and even an unfortunate cucumber he’d found in the fridge were fair game.
Sonic, fed up with being creative, eventually ordered an obscenely expensive amount of sex toys for himself. The week it took for them to be delivered was torture; but after that, it was nothing but pure bliss. Most of his time while Shadow was at work was spent in bed, playing with himself and experimenting with the wide array of dildos he’d purchased. Any and all positions were fair game, as long as there was something inside of him.
His favorite toy, he’d found, was a large vibrator that stimulated the eggs inside of him, causing them to wiggle and churn. It felt so good inside of him that he couldn’t help but feel like his body was made for carrying eggs. He supposed, in the literal sense, it was, given that he had been assigned female at birth—but standard Mobian reproduction was quite different than something like this.
One particular evening, Shadow had returned home from a mission and the two of them were spending their night playing video games on the living room couch. It was a racing game, and Sonic was so close to the finish line, just seconds ahead of Shadow. He couldn’t wait to win and rub it in his husband’s face—
And then the eggs inside of him started to churn and shift, immediately sending a desperate heat between his legs. Perhaps, he realized, this was because he hadn’t properly masturbated for a couple of hours, and the alien spawn in his body was getting restless. His bloated belly gurgled, and Sonic couldn’t help but throw his head back and moan.
He dropped the controller, game entirely forgotten.
“Are you okay?” Shadow asked, startled.
“Mmmm,” Sonic keened, and in an instant he was on Shadow’s lap, grinding down against his thigh. Sonic nipped at Shadow’s neck, whining and purring. His hand found its place between Shadow’s legs, pressing, rubbing.
“Sonic,” Shadow breathed, his breath hitching. “What are you—"
“More,” Sonic whined, pressing his fingers down and releasing Shadow’s cock from its pouch. “I need more…”
“I don’t have any more,” Shadow whispered, bucking his hips into Sonic’s hand, “Not for another couple months.”
“Please,” Sonic begged, shifting so he was straddling Shadow’s cock. He lowered himself onto him slowly, moaning loudly. “Ahh, please…”
Shadow’s hands found their place upon Sonic’s hips, digging his claws into him as Sonic lifted himself up before pushing back down again.
“Nghh,” Sonic groaned, “I need…”
The eggs inside his body shifted to accommodate Shadow’s cock, and Shadow had to admit it certainly was a… unique, experience, fucking Sonic when he was full of eggs like this. The cool, gelatinous outer membrane of the eggs added another level of sensation, one that drove Shadow wild.
If he had more eggs to put in him, he would.
“I don’t have any more,” Shadow whispered, “They’re still developing…”
But despite what Shadow cooed at him, Sonic just kept begging as he rode him, his hands braced against Shadow’s shoulders. Shadow thrust his hips into Sonic every time the hedgehog lowered himself, quickening their intensity and pace. Shadow felt tension begin to build up inside of him—but not the kind of tension Sonic wanted.
When he came, it was just fluid, which spilled into Sonic, and both hedgehogs moaned loudly, hitting their climax.
“I think I’ve accidentally turned you into a breeding drone,” Shadow grumbled, pulling Sonic close to him.
“A… huh?”
“I… don’t know much about the Black Arms from whom I descended, but from what I’ve learned, there are… certain members of their society whose sole purpose is to be bred. They drift from nest to nest, taking in as many eggs as they can, and… I suppose there must be some sort of hormone in the eggs that drives such desire to be bred.”
“Oh,” Sonic breathed, “Well, I wouldn’t mind being a breeding dr—”
“That’s because your belly’s full of eggs,” Shadow said, rolling his eyes and poking at Sonic’s stomach, “and your brain’s all gunked up with hormones.”
Shadow swore Sonic was able to sense when his next egg cycle was starting; because, he noticed, as the pressure in his body began to build, Sonic grew much more doting. He massaged and caressed Shadow’s body whenever he was within arm’s reach. The hero began to make quite the habit of hugging Shadow from behind, wrapping his hands around Shadow’s body and kissing tenderly at the back of his shoulder. Ungloved, peach-furred hands massaged at Shadow’s lower belly.
Shadow ended up having to take a few days off of work, because Sonic would whine and whimper whenever he was separated from his mate. He would beg Shadow not to leave him—even when the hybrid was only going into the other room. He’d grown quite needy. Likely because he wanted to be there when the eggs came.
By this point, Sonic’s belly had swollen little bit more. The eggs incubated differently than a standard Mobian child; they didn’t grow nearly as much. This was likely due to the fact that there were so many of them; they just needed a nice warm place to incubate, and then they’d be released to continue the rest of their development. But still, being a third of the way through the gestation period, Sonic no longer looked like he ate a little too much, and more like he was actually a few months pregnant.
When Shadow’s eggs were nearly ready—perhaps only one more day, Sonic got even more handsy. He dared to rub between Shadow’s legs with a free hand as they watched movies. He kissed Shadow hungrily, nipping at the hybrid’s lips. He sat with his legs spread wide, inviting.
And eventually, Shadow was unable to resist the allure of his mate, and he found himself bending Sonic over the kitchen counter and shoving his achingly hard cock into him.
Shadow had been in the middle of cooking dinner, but the eggs were more than ready for release and Sonic had gotten just a little to adventurous with his hands. He quickly shut off the stove’s burner and shoved Sonic face-first into the counter, fucking him hard and fast.
Sonic’s moans were delicious, intoxicating. The way Sonic shifted his legs to allow Shadow as much space to drill into him was beautiful. The eggs inside him felt amazing; so amazing that he wanted to fill him up with even more. Shadow caressed Sonic’s swollen belly as he wondered just how big and pregnant he could make his mate.
“What do you want?” Shadow growled. “You want to be full of my pups?”
“Please,” Sonic begged between moans, “Fill me up!”
Both of them were breathless when the first egg pushed its way into Sonic. They were seeing stars by the time the second came. Sonic clung to the cold surface of the marble countertop, a puddle of drool pooling on its surface.
By the time all the eggs had been laid, Sonic was limp against the counter, whimpering at the pressure in his body. As Shadow came down from the high, he gently caressed his mate’s physically taxed body, purring soothingly into Sonic’s ear.
“Help me—” Sonic whispered, slowly pushing himself up from where he’d been bent over the counter. Shadow placed a hand on his bicep to support him as he wobbled out of the kitchen and into the living room, where he flopped exhaustedly down upon the soft couch.
“How many do you think that was?” Sonic asked softly. “I—I wanted to count ‘em this time, but it’s so hard to think about anything when you’re being fucked senseless.”
Shadow chuckled. “Hell if I know,” He said, “It’s hard to think about anything when you’re fucking your husband senseless.”
Sonic giggled.
“But really,” Shadow continued as he gazed down at his mate who lay stretched out across the length of the couch, “I’d estimate around ten. Plus the first round, I think it’s safe to say you’ve got at least eighteen to twenty in you right now.”
Sonic purred.
With a roll of his eyes, Shadow exited the room and went back to the kitchen, intent on finishing what he was cooking.
As the months continued to pass, Sonic’s belly swelled, full of an obscene amount of Shadow’s spawn. Logic told them both that it was too much; that taking care of so many children would be a nigh impossible task. But desire kept them going, Sonic’s mind muddled with hormones and need. Even when Shadow had no eggs to give, Sonic was desperate for Shadow.
They made a habit of having sex every morning before Shadow left for work and every evening when he returned. Ever since he’d laid the first round of eggs in his husband, Sonic’s sex drive had skyrocketed, so much so that Shadow almost had a hard time keeping up.
Almost.
“What—” Sonic asked one morning between as he bounced up and down on Shadow’s cock, Shadow laying flat on the bed as his husband rode him, “What are these things even gonna—ah—look like?”
“Hell if I know,” Shadow said, planting his hands firmly on Sonic’s hips and groaning, “They could look like Black Arms spawn, in which case we’d have to kill them; or we could be stuck with way too many children for our own good.”
Sonic whined as he slammed himself down onto Shadow, his eyes rolling back as Shadow’s cock hit that sweet spot inside of him.
“We could put them up for adoption,” Sonic muttered when his brain allowed him to form a coherent thought, “Though that would be a lot of kids displaced from a home…”
“Maybe we should stop,” Shadow said, even though he didn’t want to. His eggs were ready to be released into his mate once more, but they hadn’t come yet— they still had time to back out. Soon, Sonic’s body would expel the first batch of eggs he’d laid. And in time, things would potentially go back to normal.
“Noooo,” Sonic whined, leaning down and pressing his face into Shadow’s neck, nipping gently right where it met his shoulder. Shadow’s hands found their way around Sonic’s body, kneading at his ass, forcing his hips down onto his member.
Sonic’s body didn’t quite fit as neatly against Shadow’s anymore, his impregnated belly jutting out and pressing against Shadow in a rather awkward (but hot) way. He loved the way he’d ruined Sonic, turning him from the lithe, graceful, dignified Hero of Mobius to a pregnant whore.
“Do you think they’ll even fit in me?” Sonic breathed, groaning as Shadow yanked his legs further apart to give his cock more access. “Chaos, I’m so full already…”
“I’ll make them fit,” Shadow growled, bucking his hips into his lover. Sonic moaned and purred.
“H—” he stammered, “Hang on, Shads, I wanna try something.”
Shadow snarled aggressively as Sonic pulled himself off of his member. The hybrid moved to grab Sonic and shove him back on. What was he doing? His little slut needed more eggs inside him—
But then, Sonic shifted, sliding downwards until his mouth met Shadow’s cock. He took the tip into his mouth, tracing his tongue over it. Shadow moaned loudly at the sensation, gripping the bedsheets as Sonic worshipped his cock with his mouth.
And when the eggs finally came, instead of going into Sonic’s pussy like they had in the past, the hero greedily swallowed them one by one. He whined and shuddered, unaccustomed to having the eggs in his mouth. But he was a good boy, and he took them all.
Despite his commander’s complaint, Shadow called out of work that day, opting to spend it with his beloved husband, cuddled together on their bed, his hands on Sonic’s swollen belly.
“I like you like this,” Shadow growled into Sonic’s ear as his hands explored his body, “horny and pregnant.”
Sonic moaned, and in an instant they were all over each other once more.