Brotherly Betrayal

by TheVClaw

Rating: mature
Tags: Sex, Queen Chrysalis, Non-consensual, Pharynx, Thorax, My Little Pony: Friendship is Magic, Dark, Fetish, Porn
Length: 9368

Shortly after discovering that his brother is still aligned with Chrysalis in secret, King Thorax tries to escape Pharynx's clutches upon being discovered. Unfortunately, the changeling isn't able to escape his brother's twisted plans for him...

King Thorax was just informed that Queen Chrysalis, the former tyrannical ruler of the Changeling Kingdom, had recently been spotted in Canterlot during the Summer Sun Celebration. Due to the urgency of such a terrifying detail, Thorax was quick to try and find his brother, General Pharynx, to deliver the news himself. But much to his horror, when Thorax finally came across Pharynx's whereabouts, he was shocked to discover that the "reformed" changeling was still tightly aligned with Chrysalis in secret. And even worse, before Thorax could try and seek assistance in taking down his traitorous brother, he was quickly discovered as soon as he tried to escape.
Much to the Changeling Kingdom's soon-to-be horror, Pharynx had a lot of plans for his little brother while he was bound in chains in an undisclosed cave. Not to mention, an unexpected discovery by Chrysalis results in big changes for both of the changelings. One for the better, and one for much, much worse...

This story was the winner of my Monthly Patreon Commission Story Poll for August of 2019, and was suggested by my Patron QueenieChryssie. This is also the second place winner for the Self-Cest September Contest in the Incest is Wincest group.

Obviously, this story is a M/M clopfic that features themes like Incest, Changeling-Induced Self-Cest, oral sex, ball worship, oviposition, urethral play, cock-fucking, transformation, and a dark ending. Reader Discretion is Advised.

Published 2019-09-06 16:40:01 UTC
Last updated 2019-09-06 16:40:01 UTC

The Fall of King Thorax

“Pharynx? Ugh… Where in Equestria did he go at this hour?”

Thorax sighed with a strong roll of his eyes, not wanting his paranoia to get the best of him when it was so late already. Fortunately for the changeling, he didn’t have to worry about bumping into anything while he traversed through his Hive’s tunnels by himself. Even though it was late enough to leave the skies outside an eerily pitch black, the revitalization efforts put forth by King Thorax’s subjects left their Hive brightly lit where it was needed. Just over a year ago, the Changeling Kingdom’s main Hive was a desolate array of petrified stone and wood, meant to resemble a castle for their wretched Queen Chrysalis; but ever since King Thorax was fortunate enough to take control, the interior of the Hive now carried a beautiful plethora of vibrant, luminescent vines that hugged around the tunnels above Thorax’s head.

As he walked alone down one of the pathways, Thorax had to stop and sigh to himself with an optimistic smile. Even though he had been acting as King long enough to grow accustomed to the role, it was still jarring how quickly he was thrown into leadership after helping to defeat Chrysalis. Luckily, since most of the Changeling Kingdom secretly despised Chrysalis’ rule, it wasn’t too hard for Thorax to get the assistance he needed while revitalizing the nation’s sorrowful state. The Changeling Kingdom may have not been perfect, but Thorax was confident that things would continue to run smoothly under his rule.

Unfortunately, despite how comforting it may have been to reflect on things, the changeling still groaned as he looked around the vacant spaces he walked past. It had been over an hour since he tried to look for his brother, but Pharynx was nowhere to be seen. Normally that wouldn’t upset Thorax too badly, since he knew his brother to be more of a loner than most other changelings. However, since he was just informed of a possible sighting of Queen Chrysalis in Canterlot not too long ago, and Pharynx was given the role at the Changeling Kingdom’s Head General, Thorax was determined to find him and give the intel personally.

After rounding another corner, Thorax was trying not to seethe in anger upon finding another vacant cave. “Nnnnghhh!! PHARYNX!” he shouted out angrily, which caused his voice to echo down the tunnels and ripple the flowers hanging from the vines. “Pharynx, you better not be avoiding me! I’m not afraid to send out a search party!”

Despite that threatening remark, Thorax was still unable to find his brother after walking through a couple more tunnels. Even though he knew it would be difficult to find the General this late at night, Thorax was trying not to grow too worried about why that may be. Ever since he became the anointed King, he knew that Pharynx was never too pleased with his leadership skills. Not to mention, unlike most of the other changelings nowadays, Pharynx was one of the few who legitimately respected Queen Chrysalis, and blindly trusted her no matter what. But after the General experienced his own physical reformation before his very eyes, Thorax tried his hardest not to grow too suspicious on the matter; loner or not, Pharynx would always be his brother first and foremost.

“Okay, that’s it!” After losing hope in finding Pharynx himself, Thorax turned around so he could make his way back to the main part of the Hive. “If he’s not going to be present when I need him to be, I guess I--”

“Well of course I am!” came Pharynx’s voice, which Thorax was able to catch from a considerable distance away. It may have been very muffled and hard to catch, but Thorax could recognize his brother’s voice from anywhere. He turned his head around to where he heard it come from, just as he heard Pharynx add, “You really think I’m not doing anything around here?! The only reason I haven’t left yet is because of you…”

Thorax’s brows rose up tremendously, and he grew confused as to what Pharynx may have been talking about. Despite how strained their relationship may have been, Thorax always assumed that he was the reason Pharynx stuck around the Changeling Kingdom. His bug-like eyes narrowed in suspicion before he began to walk towards the voice, but he kept his steps silent so he could hear without the risk of intrusion. However, not too long after hearing that comment from Pharynx, a female voice replied with a tone familiar enough to make Thorax freeze in utter fear.

“Well, I should hope that was the reason, ‘General’ Pharynx! The last thing I’d want to assume is that you would be under that traitor’s influence as well…”

That voice belonged to Chrysalis, much to Thorax’s shock and unbridled panic. While he knew that Chrysalis was likely to return in an attempt to reclaim her throne, the idea of her actually being in this very Hive without tripping any alarms was more than mortifying for the young King. Not to mention, the idea that Pharynx would actually be assisting her was horrifying enough to make his blood run cold. But instead of running off to find reinforcements, Thorax gulped nervously before he stepped closer towards the voices. Unless he actually saw it with his own two eyes, the changeling had to be hopeful that it wasn’t what he was assuming at that moment. Unfortunately, just as he came across the opening to an unused cavern near the end of the tunnel, Thorax could better hear those voices conversing about more alarming things.

“My Queen, you know that I’d never betray you like that,” said the voice of Pharynx with a sincerely insistent tone, which made Thorax wince strongly. “I already told you multiple times before, I couldn’t risk being exposed if I went against Thorax too openly! You understand that, don’t you?”

“Well, of course I do,” purred Chrysalis’ voice with a more withheld, but unrelentingly firm tone back at Pharynx. “I was obliged to do a lot of things I didn’t care for when I posed as Princess Cadance. But even then, I got things done after a couple months! You’ve been pretending to be a defector for over a YEAR, and what do you have to show for it?! TELL ME, PHARYNX!!”

Thorax shivered badly enough to make his wings buzz for a second against his back, but he was quick to pull them down to avoid being heard by either of those voices. Even though he was determined to peer in on whatever Pharynx was doing, that response he heard caused Thorax to bite his lip in trepidation. The idea of Pharynx realigning with Chrysalis was bad enough, but it was almost unfathomable to think that none of his efforts since his reformation were for show. Thorax knew that it was a better decision to run away from their conversation, and get some Guards to apprehend his brother for whatever crimes he was planning to commit. Unfortunately, since he saw himself what happened to Twilight when she made assumptions about Chrysalis at the wedding, the last thing Thorax wanted was to do something similarly foolish with his brother. He hoped more than anything that it was just an elaborate roleplay session, or even two other changelings posing as the two for a skit...

But as soon as his head peeked through the opening of the cavern, Thorax gasped silently upon seeing his brother by himself in the room. Or more specifically, General Pharynx standing before a glowing orb of green magic, which carried a direct feed to show Chrysalis’ face. She was standing in what looked to be a room in a completely different location, but her presence alone was still shocking to the Changeling Kingdom’s current King. Not only was Pharynx still aligned with the fiendish being, but he was somehow able to acquire a private feed to converse with her without anyone knowing! And right now, Pharynx had his full attention on the former Queen, not noticing the gawked stare from his brother behind him as he spoke confidently.

“Believe me, my Queen,” said Pharynx with a stern and unmitigated stare at the screen. “I’ve been doing everything I can to ensure your return would occur flawlessly. My secondary officers are already aligned with me without Thorax knowing, and I’ve altered the magic signatures on our security spells so they wouldn’t be able to track you. As soon as Grogar and his forces overthrow Canterlot, you can come right in without any combat needed! Even Thorax won’t be able to stop me by the time you reclaim your throne. I can promise you that with my life~”

Thorax’s jaw dropped, not able to say a word after hearing his own brother saying those things. Meanwhile, Queen Chrysalis’ smile widened through that screen as she peered down at Pharynx, and gave a satisfied nod of her head. “Now that’s what I was wanting to hear from you,” she said with a more content-sounding growl in her voice, before her eyes narrowed more intently on him. “Although if you really wanted to show your place like you SHOULD, you should consider letting me see some results before Grogar starts his own plans. I’d rather have my Hive back so I can better defeat him myself~”

Pharynx huffed with an amused smirk up at her, and asked confidently, “Are you suggesting we hold a takeover now? I mean… I wouldn’t be against that, but it might be risky.”

“So was sleeping with Shining Armor for months on end, but I was able to do that, wasn’t I?” asked Chrysalis with a scoff. “So how about you stop questioning your Queen like your brother would, and show how much more capable you are than him. Find Thorax, and have him ready for me to indoctrinate! As soon as you can do that, I’ll come back so we can start our plans. You think you can do that in less than a year?!”

Thorax’s eyes were beading in fear, and his heart was racing while standing out of sight from Chrysalis’ magic feed. Unfortunately, even if he wasn’t being noticed by either of them, the changeling never felt more at risk in his entire life. That panicked state only intensified as he watched Pharynx bow his head before the Queen, and said, “My Queen, I promise I’ll have him in my grasp before the week is over~”

Thorax’s mind was running a complete blank, but his body was fortunate enough to take action in its place. Without even realizing it, Thorax felt himself turning around to run like Tartarus away from the cavern, hopeful he could make a beeline for Equestria and get some help. Unfortunately, as soon as his hooves tried to get some traction, his hind-legs skidded a little against the gravel lined outside the cavern. And only a second or two after he began to run, even the buzzing of his wings wasn’t enough to keep him from hearing Pharynx’s voice shouting out, “What the?! WHO’S OUT THERE!?!”

Thorax’s hooves bolted from the ground, and he tried to keep his body still as he flew through the tight confines of the tunnel at top-speed. He may have not been the best flier, but he knew this Hive well enough to confidently try soaring through without the worry of injury. His eyes were narrowed in utmost focus, and he tried his hardest not to think about the looming threat set to try and find him before it was too late. But sadly, despite how hard the wind was brushing past his green chitin, and how quickly he felt he was flying down that tunnel, Thorax’s tearing eyes widened in dread when he heard his “brother’s” voice bellowing out from behind him. “THORAAAAAAXXXXXX!!!”

Thorax couldn’t dare try and look behind him, but he could still sense Pharynx gaining speed on him as he shot through the tunnels like a rocket. Along with being a skilled tactician and survivalist, Pharynx was also significantly faster and stronger than his King of a brother. So even as Thorax was flying for his very life through the tight confines of his Hive, Pharynx had his fanged muzzle snarled intensely as he barrelled closer to him inch by inch. “YOU CAN’T HIDE FROM ME, TRAITOR!!” he screamed out with an unbridled anger that Thorax had hoped was no longer in his system; but as the General continued to gain on his brother, his demeanor appeared to be just as menacing and cruel as he lit up his horn brightly. “GET BACK HERE NOW!!!”

The exit of the tunnel was within sight after rounding the final corner, but Thorax instantly felt his speed diminish before he could reach it. An immense bout of pressure clung to his hind-legs, which was caused by the strong grip of Pharynx’s magic catching his brother before he could escape. That eerie yellowish aura soon enveloped Thorax’s entire body, and covered his muzzle before he could have the time to scream. The King quickly found himself unable to fight back, as his he felt entire body being pulled back like he was caught in an elastic trap. And without a moment to even reflect on what he may have done wrong, Thorax was thrown with tremendous force away from any sense of safety.

With a thundering crash, the changeling’s body collided with the wall of that corner, and caused him to instantly black out before he could use any of his magic. Because of that, General Pharynx was able to land back on his hooves, and walk disturbingly casually up to his brother’s unconscious form. Even as a couple stray tears rolled down the King’s cheeks, Pharynx couldn’t help smiling in satisfaction upon seeing the changeling laid out for him so easily. “Heh~ And to think, those ponies actually considered you to be a proper King~”

Even though Thorax wasn’t conscious when that statement was made, Pharynx wouldn’t have waited for a response anyway. Instead, the darker green changeling lit up his magic to pull Thorax off the ground, and quickly pulled him back towards the dark abyss he had just tried to escape from…

“MMMPHH!!”

Thorax jolted awake in an instant, and his eyes shot-wide open as he tried to get back on his hooves. But much to the changeling’s dread, his legs were all tightly bound in metal chains, and he was left hanging from the stalagmites above his head to dangle helplessly. Thorax had no idea where he was, but he could only assume that his “brother” took him to some nondescript cave that none of the other changelings were aware of. And to make matters worse, it didn’t take long for Thorax to realize that his face was restrained with a black muzzle-guard, and his horn and antlers were all fitted with thick magic-inhibiting rings at their bases.

“Nnnnghhhhh!!” Despite how hard he tried as he thrashed wildly in his bindings, Thorax couldn’t break himself free while he hung by his forelegs from the ceiling. The chains connected to his hind-legs were securely latched to the stone ground, and kept him stretched-out in a spread-eagle position to ensure he wouldn’t escape. After about five minutes of continuous squirming and buzzing, the only thing Thorax was able to achieve was a thoroughly exhausted state before he slumped lazily in his bondage.

Oh, Goddess, he thought to himself in deep lament, as his eyes clenched tightly shut to keep from crying alone in the dark. How could Pharynx do this to me?! How could he do this to the Changeling Kingdom?! I thought he was doing so well… I… I trusted him…

Even with his eyes clenched shut, a couple tears trailed down his chitinesque cheeks as he hung in silent remorse. He had no idea how long he would be down in that desolate cave, but he had a feeling his traitorous brother wouldn’t let him out anytime soon. All he could hope for was the chance that someone up above would realize he was gone, and possibly send that intel to Celestia before Grogar invades Canterlot. But given the state he was in, the idea of staying optimistic seemed more fruitless with each additional tear that dripped down to the ground below his dangling hooves.

Eventually, a bright light came out of nowhere, and caused Thorax to wince from the blinding pain that irritated his eyes. While the changeling tried to turn his head away from the source of light, a familiar shape came into view from the cavern’s revealed entrance. A strong aura of teal magic took hold of a massive boulder, which was used to re-cover the entrance and keep the daylight from seeping in. But even as the darkness returned, Thorax was able to see his oppressor when he slowly reopened his eyes, and caught a glimpse of Pharynx’s glowing magic. Unfortunately, as soon as his eyes adjusted to the light, Thorax gasped through his muzzle guard upon seeing the identical copy of himself who was standing before him.

“Well, it’s nice to see you haven’t died yet~” purred Pharynx with a shit-eating grin, which was the only thing that looked off when it came to his Thorax disguise. The real Thorax tried to thrash and scream through his muzzle, but only muffled groans were able to come out while his brother chuckled in delight. “Honestly, I don’t really care if you exhaust yourself any more than you already have,” said Pharynx with a light shrug of his shoulders, and a perfect mimic of Thorax’s voice. “It’ll just make things easier on my own end.”

Thorax eventually settled down in his chain bindings, and stared back at his imposter with a deathly glare. Of course, Pharynx didn’t look the least-bit intimidated by that stare, and just scoffed with a playful roll of his eyes. “Yeah, no,” he said with a shake of his head. “I swear, Cozy Glow looks more intimidating than you do.”

The bound changeling growled even louder through his muzzle, which didn’t faze Pharynx in the slightest while he circled around him tauntingly. “I will say though, your form is disturbingly easy for me to use as a ploy, Thorax~ I was able to cancel all of your upcoming appointments for the next two weeks, order your staff to refrain from doing any upkeep in your living quarters, and put out an official notice to say you were going on ‘Vacation’ for the foreseeable future! And you know what the best part of that is? Not a single one of those idiots even batted an eye~”

If Thorax was able to break from his chains, he likely would’ve been able to bash his brother’s skull in before he finished that villainesque monologue. Unfortunately, since the chains were thick enough to pull up an anchor, the fallen King was no real match against the stainless steel. So instead of dishing out any much-needed revenge, Thorax could only hang helplessly as the imposter continued his rant. “So now… You and I are able to have a lot more time together to ‘reconnect,’ as you’ve suggested countless times before~ Heh heh heh… Although, I’m willing to guess this wasn’t how you intended it to go, huh?~”

“NNNNFFFFFF!!” Thorax thrashed hard in his chains the moment Pharynx got back in his line of vision, and his murderous stare on the traitor grew more intense with each passing second. Pharynx was sure that if he undid that muzzle guard, he would likely hear a plethora of slurs and insults thrown in his face by the furious King. So instead, Pharynx took solace in his brother’s muzzled silence, and looked away from Thorax with a content-looking smirk.

“Oh, but don’t worry,” he said in a sickly-sweet, faux-assurring voice that was practically dripping with disdain. “I’m not planning to kill you, dear brother. After all, it would be far too suspicious if you were to disappear, and I had to constantly switch between our two forms all the time like some bad sitcom plot. Not to mention, my Queen was intent on keeping you alive, just so you could see with your own eyes what she’s able to do…”

With that pause, the fake Thorax grew an evilly wide grin as he looked back at his binded brother. Thorax still looked enraged, but his squirms lessened as he took notice of Pharynx’s demented smile. His breaths through the muzzle guard weakened, and his expression showed a notable look of fear. As for the unchained changeling standing before him, he only took another moment to marvel at his work before he lit up his magic even brighter. “Or more specifically… What I was able to do without you knowing…”

The captor closed his eyes, and activated his changeling magic so a fiery inferno of green flames enveloped his body. The flames may have not been able to burn anything, but Thorax still averted his eyes from Pharynx due to the intense brightness. The entire cavern was illuminated with that vibrantly green magic, which lingered across Pharynx’s form for far longer than usual. However, as soon as the flames finally depleted, and the changeling was left in a thick plume of smoke, a flash of white light soon came afterward to reveal Pharynx’s new form…

Or more specifically, his original form.

Thorax gasped in shock the moment he took notice of his brother’s new shape, which happened to be the unreformed version that was commonplace before Chrysalis’ expulsion. Pharynx’s moose-like antlers were gone, and only the misshapen chitinous horn was what remained atop his bald head. His stature was much shorter than before, and was glistening from the smooth black chitin that encompassed his form once more. The holes in his legs were back, which didn’t seem to faze Pharynx at all while he shot a cocky grin up at his captive prey. In fact, judging by how many of his fangs that could be seen in his wickedly wide smile, it seemed that Pharynx was downright elated to be back to his insectoid state.

Thorax looked absolutely mortified, and his eyes sunk in fear as he realized just how horribly things were likely to go for himself.

“I know, right?~” beamed Pharynx as he narrowed his dark purple eyes on him, and gave a giddy-sounding chitter while his wings buzzed against his back. “I couldn’t believe the effects of that putrid ‘reformation’ were reversible myself! But apparently, when Chrysalis and her allies captured a bewitching book from Canterlot, she was fortunate enough to craft her own spell that could counteract your ‘love-giving’ bullshit! And guess what?!”

Since Thorax was rightfully frozen in fear, still in shock that the reformation process could actually be undone, Pharynx flew up to get in close to his brother’s face and say with a deathly grin, “While you wallow away down here, I’m going to reverse it for Every. Single. Changeling~”

“NNNNNNNNNGGGGGG!!!” Thorax tried to lunge in and attack his brother, but he was barely able to move an inch due to those chains. Meanwhile, Pharynx cackled to himself gloatingly as he flew back down to the ground, and left his brother thrashing furiously to no avail. Unfortunately, it seemed that Pharynx wasn’t done with the bound King just yet. Even though he could’ve easily went back up to start Queen Chrysalis’ horrifying plans, the changeling made his way over towards a far-off corner in the cavern. And for Thorax, who was still desperately trying to free himself, his eyes widened as he followed the glow of Pharynx’s horn, and saw him reach for something that was hidden underneath a heavy tarp.

“And you know what’s the best thing about reconnecting with our Queen, Thorax?” he jeered as he shot a cheeky grin back at his brother, and gave a theatrical pull of the tarp for his big reveal. “She was able to send me gifts!~”

Thorax almost had a heart-attack, and screamed through his muzzle guard the moment he saw those thick, glowing changeling eggs laid out in a makeshift nest. He had no idea how Pharynx was able to acquire something like that without detection, but there was no denial that those throbbing, insectoid-like eggs were as real as could be. The luminescent greenish glow helped to light up the cavern even more, and revealed just how much Thorax was trying to writhe himself away from those eggs. Meanwhile, Pharynx casually trotted back towards his panicking brother as he asked, “Oh, what’s the problem, brother? It’s technically morning right now, so you might as well get some eggs for breakfast~”

An even louder scream emitted from Thorax’s muzzle guard, but his muffled cries for help only echoed fruitlessly within the confines of the cavern. Meanwhile, Pharynx chuckled lightly to himself after making that little quip, and shook his head as he got up close to his brother’s bound form. Since he already revealed his de-reformation, the changeling wasn’t too worried as he gave a quick flash of his green flames to change form again. But much to Thorax’s surprise (or at least, what would’ve been a surprised reaction if he wasn’t continuously screaming and thrashing away from Pharynx), those flames dissipated to reveal that his brother had turned back to Thorax’s appearance.

“Aaahhhhh… I’ll be so glad to rid you of this fru-fru form soon enough,” Pharynx said with a strong tone of distaste as he glanced down at one of the lime-green hooves Thorax possessed. Nevertheless, the changeling shrugged to himself before he looked back up at the petrified state the real Thorax was carrying in his terrified, wide-eyed expression. The traitor may have been aware of how “wrong” it may have been to do all of this, even if he vehemently supported his Queen’s cause without hesitation. But as soon as he saw Thorax starting to cry again, the changeling groaned with a roll of his eyes. “Oh, come on!” he said as he quickly illuminated his horn. “I didn’t want to go this far to make you comply, but I guess that can’t be helped, can it?”

With a strong flash of his magic, Pharynx’s ghastly green aura illuminated around Thorax’s head. The King instantly clenched his eyes shut, and tried his hardest to resist as he squirmed uncontrollably in his restraints. But down below Thorax’s dangling hooves, Pharynx carried a determined grin while he kept that magic in focus around his brother’s mind. And despite how much Thorax tried to train himself to counteract any mind-control or hypnosis spells Chrysalis may have had, Pharynx’s unreformed magic was able to weaken the King’s defenses in less than thirty seconds.

“NNNNGHHHH!! Nnnnnnnnn… Mmmrrrrghhhhh…” Slowly but surely, Thorax’s strained movements against the chains weakened as he felt that changeling magic taking hold of his conscience. His eyes tried their hardest to remain tightly shut, even as his mind succumbed deeper to those horrible auras he was forced to use so many times before the reformation. His lips began to quiver behind his muzzle guard, and his weakening state made his last remaining tears trail down his cheeks. But eventually, as Thorax’s muffled screams turned to faint and mumbling groans, it grew scarily clear just how effective Pharynx’s magic was to leave his brother compromised. And as soon as he released his magical grip around Thorax’s mind, the chained King laid completely limp in his restraints, much to Pharynx’s delight.

“Sooooooo…” The captor, who was still taking Thorax’s form with a curious smirk, raised up a hoof to gently rub against his brother’s thigh. “... are you still gonna resist your Queen?~”

The real Thorax slowly lifted up his head, and revealed a blank expressionless face that made Pharynx grin excitedly. And when Thorax finally reopened his eyes, it was obvious that he was under the captor’s control as they glowed brightly with Pharynx’s green magic. The changeling was no longer thrashing in his restraints, and laid completely dormant as he hung before his brainwashing captor. Fortunately for Pharynx, his question didn’t go unanswered, and it only took a couple seconds before Thorax groggily shook his head.

“That’s what I was hoping for~” purred the fake Thorax, who was grinning even more upon seeing how effectively he disabled his brother’s resistances. He rubbed up and down Thorax’s leg more sensually, and looked up at him with his eyes narrowed with intrigue. “Mmmmm… I gotta say, you’re a lot more tolerable when you keep yourself silent,” he said with a more alluring tone, not seeming to mind that it was technically his brother’s voice. He glanced up at Thorax’s bound form, and grew a look of contemplation for a moment before saying, “You know what? I’m gonna keep you in the chains and muzzle guard. You won’t complain, right?~”

Thorax gave another slow, half-conscious shake of his head. It seemed that he was looking down at the mimic of himself who was grinning more cockily, but it was hard to tell since his eyes were glowing so vibrantly with green magic. Nevertheless, Pharynx still chuckled upon seeing the King’s compromised state, and brought his chitinous hoof up closer to his brother’s hips. “That’s a good thing to hear, brother~” he said rather cheekily, making sure to place some emphasis on that relation like he saw it as a joke. “Because with the plans I have for you, I have a feeling you should stay off the ground for a while. After all…”

His smirk became more lustrous as he glanced down at Thorax’s waist, and stared directly at that exposed sheath. The changeling race may have been more open-minded about sex (obviously due to how essential it was to retrieve love before Chrysalis was defeated), but incest was one of the few taboo kinks that many of the drones refrained from practicing themselves. But judging by the grin that fake Thorax was carrying on his muzzle, it seemed that Pharynx wasn’t against seeing his brother’s sheath and balls up close. The package may have not been too impressive while flaccid, but Pharynx seemed optimistic about the work he was about to give to his former Superior while finishing his statement. “... it would be such a shame if any of our Queen’s eggs were to break inside of you~”

With that, Pharynx didn’t wait to hear a reply from his brother, and stood on his hind-legs so he could be in a better position before his brother’s crotch. The Thorax mimic closed his eyes as he leaned in, and dragged his tongue along the inside of the real Thorax’s thigh. Aside from a small twitching of his muscles, the only real response that Thorax could give was a soft and muffled groan through his muzzle guard. Meanwhile, his captor continued to work his way up towards Thorax’s member, and moaned a little while he lapped across his brother’s smooth chitinous flesh. There was a slight saltiness to Thorax musk due to how much he was sweating, but also a distinct sweetness that could be caught just beneath that. Blood relation or not, Pharynx groaned with a strong shudder the moment his snout made contact with the bottom of Thorax’s ballsack.

Pharynx’s eyes clenched even tighter before he took a deep breath, sucking in that heady aroma that had been lingering on Thorax’s bound form since he was thrown into this cave. Even if his appearance wasn’t too pleasing to the unreformed changeling, it seemed that his scent was still alluring enough to make his own member slip from his sheath. With every groaning breath that the fake Thorax took underneath the real Thorax’s crotch, his curved and lime-green cock twitched more prominently as it grew erect beneath his barrel; the member itself looked fairly unique with a shaft slightly thinner than a stallion’s, and a bulbed cockhead that resembled an unbloomed flower. And while that cock grew harder from every sniff he took, it didn’t take long before Pharynx’s actions elicited a similar response from the bound changeling’s sheath as well.

“Mmmmmm…~” Pharynx’s eyes were rolling to the back of his head while he continued to tease his brother’s package, and felt those distinct throbs from Thorax’s balls while they were draped over his identical muzzle. Just above the randy changeling’s head, Thorax’s cock began to twitch and slip from its sheath due to the titillation he was receiving. Even though he was being held hostage by his own brother, Pharynx’s mind-control ensured that the only response the King could give was a couple of weak moans through his muzzle guard. Of course, as soon as Pharynx brought his tongue back into play, those moans grew notably louder while Thorax became fully erect.

Underneath the binded changeling, Pharynx was fully indulging in his brother’s musky flavors while dragging his tongue across that petite ballsack. He shivered as he felt that loose skin clinging to his tongue, as well as the weight of Thorax’s balls with every hungry lap he gave. One of his hooves came up to grasp the King’s throbbing shaft, and he began to stroke it slowly to better tantalize his prey. He could hear Thorax’s muffled moans intensifying with every tug he gave, and it helped him to go even further without any hesitation.

By the time Thorax grew rock-hard with his brother’s hoof wrapped tightly around his cock, Pharynx had both of his balls inside of his muzzle to suckle on more sensually. If anyone were to walk in at that moment, they would’ve likely been thoroughly confused at seeing two King Thoraxes while one was Domming the other. But for the unbinded changeling who was standing below his brother, he probably wouldn’t have cared less while he sucked on those plump balls with more vigour every passing second. By the time Thorax began to tremble in his chains, and precum seeped at the tip of his twitching cock, the corners of Pharynx’s muzzle began to trickle in a similar manner from his drool.

“Mmmmph~” With a wet pop of his lips, Pharynx stopped his oral assault on his brother’s balls to leave them glistening in saliva. The Thorax mimic licked his lips with a satisfied purr, and brought his attention up to that cock still in his grip. Thorax’s eyes were half-lidded while he moaned helplessly in his bondage, and his hips buckled a couple times due to how badly aroused Pharynx made him. Fortunately, the captor was quick to satisfy those urges as he held Thorax’s cock at its base, and pulled the remainder of that length into his hungry maw.

Pharynx took his time as he sucked on his brother’s cock, and groaned in pleasure as he felt each distinct throb of Thorax’s shaft between his lips. Even though he wasn’t a fan of taking his brother’s form, he was aware that the lack of fangs was likely a benefit for this session. Not to mention, the fact that he was titillating Thorax with himself was surprisingly fun, since it provided an interesting form of psychological strain for his captive King. Or at least, it probably would’ve done that if Thorax wasn’t so deeply entranced in that mind-control magic, which left his mind blank enough to moan out without any hesitance.

For several long minutes, Pharynx’s head bobbed back and forth as he slid his lips across Thorax’s shaft, and sucked on that cock to push him closer to the edge. Even though he wasn’t intending to make his brother cum, the fact that he was able to bring him to that point so easily was a trait he was surprisingly prideful of. Pharynx may have been a General for his combat and survivalist skills, but he was also very efficient when it came to seduction and sexual technique. And even with his own brother’s cock inside of his mouth, Pharynx tended to it like he would any other member he was fortunate enough to satisfy with his talented muzzle.

“Nnnnnn… NNNNNN!!!~” Thorax’s hips squirmed in deeper titillation as he tried to thrust inside his mimic’s mouth, feeling himself reaching his peak faster than expected. Unfortunately, those enamored and muffled cries were loud enough to make Pharynx slide his mouth off that needy cock. His hoof went back to stroking Thorax’s length at a teasingly slow pace, and he made sure to drag his tongue slowly across the underside of his throbbing shaft. A more strained-sounding groan came out of Thorax’s muzzle guard, but Pharynx paid no heed to the King’s dire state while strings of saliva connected his mouth to that dripping member.

“Yeaaaahhhhh…” After another quick lick of his lips, Pharynx eyed his prey more intensely while grinning in Thorax’s identical form. “You like getting some head from yourself, dirty boy?~” he asked flauntingly, only doing so to further arouse his captive King. Fortunately for the traitorous changeling, Thorax instantly nodded his head as he groaned strongly in his restraints, and spurted out a couple hefty strings of precum. Pharynx chuckled in delight after seeing that response, and decided that his brother was ready for the next step.

“That’s good to hear,” he said as his smile grew wider, and he used his magic to carefully float up the nest he had waiting for Thorax. “Because I needed to make sure those balls of yours were ready for some fertilization~”

The nest was lowered before the fake Thorax’s hooves, and the ominous green glow of those eggs gave a ghastly illumination underneath the real Thorax’s bound state. The helpless King continued to moan out needily as he tried to thrust his hips, even after Pharynx pulled away from his cock completely. But despite how desperate Thorax looked as he squirmed in his chains so pathetically, Pharynx merely grinned in anticipation before deciding to change himself back. With a quick flash of his green flames, it only took a split-second before the changeling went back to his unreformed, classic changeling form.

“Aaaahhhhhh, that’s better,” he said to himself with a satisfied hiss, and an involuntary shudder that caused his wings to buzz elatedly. Since he was more content with his pre-reformed self than he ever did in that olive-green getup, his confidence only grew stronger as he went back to work. He picked up one of Chrysalis’ eggs from that nest, which was about the size of an apple while resting against his hollow hoof. Fortunately, despite how drastically the changeling anatomy changed from the reformation process, Pharynx was aware one one distinct feature that wasn’t taken away from his brother’s still-throbbing cock.

Unlike the phalluses on most other species throughout Equestria, changeling cocks weren’t necessarily a one-way appendage. Even though they functioned in the same manner as any other member, their bulbed cockheads weren’t that oddly-shaped for no reason. When Pharynx brought that first glowing egg up to Thorax’s twitching erection, the changeling’s instinctual urges overwhelmed him as he moaned out and thrusted his hips strongly. Meanwhile, the head of his cock slowly opened up, and bloomed out to reveal the three thick, drooling petals that served as Thorax’s ovipositor. And like a venus flytrap hungry for its prey, those meaty bulbs quickly latched around the egg the moment Pharynx pressed it against that inviting opening.

“Therrrrreeeee you go~” Pharynx watched with a wickedly wide smile as the head of Thorax’s cock tentatively began to swallow of the first of Chrysalis’ many, many waiting eggs for fertilization. A thick bulge soon appeared as the bulbous size of that egg tried to travel through the changeling’s thin shaft, almost resembling a snake’s body after it devours a mouse. The egg’s ominous glow could still be seen as it illuminated through Thorax’s chitin, and gave Pharynx a distinct view as it traveled its way down to the base. However, the moment that egg was fully swallowed up by Thorax’s cock, that greenish glow didn’t settle within the bladder; instead, due to another unique feature in changeling anatomy, that first egg of Chrysalis’ was somehow able to move its way downward, and settle within the confines of Thorax’s ballsack.

Thorax moaned out deeply through his muzzle guard, and shivered in unbridled pleasure as he felt that long-forgotten sensation that made his nerves tingle endlessly. The pressure of that egg may have felt intense within Thorax, since it actually encompassed more space within that sac than both of his balls combined. However, even with how brightly the egg was glowing through that loose skin, the King could instantly feel the titillation as it became fertilized with his own sperm. His head reeled back while he moaned out in rapture, and his cock throbbed like mad as the egg pulsated within him.

While that first egg settled inside of Thorax’s balls to create Chrysalis’ newest brood, Pharynx was already starting work on getting the next egg ready for him. Much like the first, Thorax’s drooling petals clung around the next thick egg like a hungry serpent, eager to swallow it down. Thorax’s legs tensed up hard against his chains, but his body was absolutely reeling from the blissful sensation as that second egg traveled through his twitching shaft. Before that egg could settle down within his ballsack like the first had, Pharynx was already cramming a third egg through his brother’s ovipositor as a greedy grin widened across his face.

“Oh, man~” Pharynx began to giggle like an overexcited schoolcolt, and continued to feed Thorax’s cock while hearing the King’s strained moans. With each additional egg he stuffed inside of his brother’s ovipositor, the eerie glow of those eggs grew brighter between Thorax’s squirming legs. And due to the changeling’s spread-eagle position, there was more than enough room for expansion as Thorax’s ballsack started to swell out from those eggs. Chrysalis’ brood weren’t exactly heavy individually, but the collected weight of those eggs quickly started to manifest as Thorax’s sac began to hang lower, and the elastic skin stretched out to make those eggs glow even brighter through it. And with a strong shiver of his chitin, Pharynx was grinning with absolute glee as he witnessed more of his Queen’s lineage being properly fertilized. “Mnnghhh… I’m not gonna lie, brother. Part of me is a little jealous that you get to hold her eggs instead of me~”

Thorax’s mind may have been too wiped to comprehend what his brother said, but a hungry moan still bellowed out through his muzzle guard while he writhed direly within his restraints. His nerves felt like they were being electrocuted from each intense wave of titillation that coursed through his veins, and grew stronger each time a new egg was being shoved inside of his cock. The smooth, slimy texture of those eggs made his body writhe as they slid through his sensitive urethra, and caused his hooves curl up tightly in his bindings. And even as he felt the pressure of his ballsack being tugged down harder which each additional egg slipping inside, the pulsating warmth from that bundle radiated out to turn any painful sensations into absolutely tantalizing jolts of pleasure.

As the minutes of continuous cock-feeding passed within that desolate cave, the weight of all those eggs began to take its toll. Thorax’s balls were swelling out more immensely while he kept trying to weakly thrust his hips, and that sac soon began to sink past his knees and dangle like a pendulum. All the while, Pharynx was groaning with a tightly-bitten lip, and began to jerk himself off while he shoved more of Chrysalis’ eggs into their newest brood drone. Even though he was groaning enviously from hearing his brother’s enamored moans, Pharynx was determined to fill him up to the brim for the sake of his duties.

“Mmmmmmphhhh… NNNNNNNGGG!!~” Thorax’s glowing eyes clenched shut while he convulsed lewdly above Pharynx, not seeming to care that his balls were swelling out dangerously large to contain all of Chrysalis’ eggs. The combined illumination from her glowing brood was shining brightly through his stretched-out sac, and emphasized the dozens upon dozens of bulges that littered across the beanbag-sized girth it now carried. Due to how overstuffed Thorax’s sac was becoming, it was hard to tell where his actual balls may have been inside of that impromptu brooding chamber. However, given how badly Thorax’s cock was throbbing by the time the last of those eggs traveled down his bulging shaft, it was obvious that he was still deeply aroused in his captive state.

“Mmmph!!~” Pharynx couldn’t take it anymore, and got himself in position in front of his brother’s cock after that final egg was stuffed inside. While that last bulge worked its way down Thorax’s length, those drooling petals at the head weren’t able to retract inward before Pharynx pressed his own cock against it. The unreformed changeling was growling animalistically, obviously too pent-up to mind what hole he was able to shove his cock into. And since the opened head of Thorax’s cock was beginning to drool with the glowing green remnants of those gooey eggs, it provided the perfect lubrication for Pharynx’s closed cockhead to work its way inside. “Y-Yeah, get in there~” he groaned to himself, gritting his fangs as he tried to accustom himself to his brother’s tight passage.

Since his mind was still thoroughly clouded in a haze of primal lust, Thorax couldn’t object to the pressure of his brother’s cockhead making use of his outstretched shaft. However, as soon as Pharynx used his magic to unclasp the chains connecting Thorax’s hind-legs to the floor, his hooves dangled helplessly while he hung by the stalagmites above. Meanwhile, Pharynx let out a strained moan the moment his bulbed head finally pushed past those petals, and left a notable bulge inside of Pharynx’s length. Regardless of whether or not Chrysalis’ eggs were already fertilized within Thorax’s ballsack, Pharynx wasn’t willing to end this assimilation without some fair play. “Aaaahhh!!~ You… You better get comfortable, egg-boy~” he growled with an eager grin, and a hard push of his hips to slide his cock deeper inside his brother’s. “C-Cause I… I’m not letting you go for a loooooong time!~”

Thorax continued to moan weakly above Pharynx’s upright stance, and shivered intensely as that pitch-black changeling cock invaded his own. While one of Pharynx’s hooves tightly grasped the captive King’s supple flanks to hold him in place, the other kept a firm grip around the base of Thorax’s cock while it throbbed mercilessly. But despite how obviously Thorax was needing to cum in his titillated state, Pharynx was intent on being the first to shoot his load between them. And as the changeling’s cockhead reached the base of Thorax’s, those eggs within his sac began to glow even brighter before Pharynx slid his cock back slowly.

“Ohhhhhhh man~” Pharynx was grinning wide enough to make his fangs glisten from the glow of those eggs, with their greenish hue illuminating him in an especially ominous light. Just as the bulge of his cockhead reached the tip of Thorax’s shaft, the captor stopped himself just before they could pop out through those twitching bulbs. Instead, Pharynx shuddered in anticipation before he huffed through his nostrils, and said up to his moaning brother, “Let’s hope you’re as tight in the front as Shining Armor was in the back~”

With that, Pharynx thrusted his hips inward to shove his cock back inside of Thorax’s twitching length, and elicited a hearty cry to bellow out of that muzzle guard. But due to his deeply aroused state, Pharynx didn’t stop to give his brother time to breathe, and instead slid himself back out to repeat the process. And as soon as that bulge from Pharynx’s cockhead traveled up towards those petals clenching around his shaft, the changeling groaned out deeply as he shoved his cock back inside even harder. And with every motion of that unreformed cock pistoning in and out of his length, Thorax couldn’t stop crying out from the relentlessly hot sensations striking his senses.

Pharynx was panting like an enraged bull as he held onto his brother with all of his might, and fucked the King’s cock with increasingly rapid thrusts. Thorax’s hind-legs squirmed and writhed while resting against the sides of his outstretched balls, and his hooves couldn’t stop curling inward from the tantalizing pleasures he was embracing so mindlessly. His head reeled back as he savored every thrust inside of his cock, and tried his hardest to cum from the lustful incestuous embrace. Unfortunately, due to that thick cock which was constantly stuffing his own, any orgasmic release that the changeling would’ve wanted to do merely made those eggs glow brighter inside of his ballsack.

The King’s cock couldn’t stop throbbing, even with how hard Pharynx was fucking it like a fleshlight. But with every pulsation Thorax felt that should’ve elicited a volley of thick, hefty ropes of cum to shoot out wildly, his balls were thoroughly claimed by those eggs that were glowing brighter from their much-needed breeding. Every drop of Thorax’s seed was being absorbed by Chrysalis’ brood, and were already undergoing the lengthy fertilization process inside of his overstuffed ballsack. But given how badly Pharynx was panting between his rapid thrusts, it seemed that the dereformed drone was eager to add his own notch into their Queen’s next lineage.

“Mnnnnghhh… You… You need to embrace the change, brother…” Thorax’s mind may have been claimed by his brother’s hypnosis, but his ears still twitched in response to hearing Pharynx’s strained words up to him. “L… Let it take you again, Thorax… Let yourself go back to what you were… Wh… What you know you deserve to be!~”

Without even realizing it, Thorax’s breaths became deeper and less frantic while succumbing to Pharynx’s lustful words. Despite knowing deep-down how horrible it would be to submit himself to such a dark and twisted transformation, his hooves were already clenching hard in anticipation while hanging from his chains. His cock tried to throb even harder in an attempt to clench around his brother’s, intent on milking him for that load meant to serve their queen. And even with his own magic being restrained by those inhibitor rings, Pharynx’s magic was able to take effect on the King as that green chitin began to steam from the increasing heat.

“That’s it!” groaned Pharynx as he felt himself getting close, but tried to refrain from finishing until the deed was done. “L-Let… Let the flames take you again!! I… I want you to change back, Thorax!! You… You know you want it, don’t you?! Serve your Queen again!! Let it take over… and… AND!! Unnnghhhh… AND TAKE IT ALL BACK!!!~”

Just as Pharynx’s head reeled back to bellow out a moan loud enough to echo loudly within the cave, his voice was accompanied by Thorax’s as he felt himself doing the same. The fallen King’s eyes remained tightly shut as he thrusted his hips against his brother’s, and his hooves finally relaxed within his bondage to let the sensations overwhelm him completely. “Nnnnnnnnn!! NNNNNNNN!!! NNNNNNNNNNNNNN!!!”

Just as Pharynx finally reached his peak, and pounded his cock as deeply as he could inside of Thorax’s shaft, the two changelings were temporarily lost from sight as that blazing inferno of green flames enveloped both of their bodies. The magical blaze lasted for several seconds, but the sounds of those brushing flames weren’t loud enough to cover up the lustful cries both brothers gave within that taboo embrace. Pharynx held onto the captive changeling with both hooves tightly clenched around his back, and hugged him with all of his might while his cock continued to throb. Inside of Thorax’s bulging ballsack, a massive volley of his thick, virile cum erupted inside of it to better fertilize every egg belonging to their Queen.

Slowly, the green flames started to dissipate, and soon revealed the back of Pharynx’s black chitin while he held onto Thorax for the duration of their shared orgasm. By the time Pharynx was able to come back to his senses, his wings were instinctually buzzing to keep him off the ground. Due to the change in size, the captor found himself dangling off the ground much like his brother was. However, now it was clear that the two were a little higher, since Thorax was no longer in the enlarged form he had been carrying before.

Pharynx opened his eyes to look back at Thorax, who was now back in that identically black chitin he once had. His bulging antlers were now gone, which caused both of those inhibitor rings to fall off of Thorax’s bald head and clang uselessly against the stone floor. Fortunately, the ring around Thorax’s crooked horn was still tightly latched around the base, as was the muzzle guard that covered his newly re-fanged muzzle. Thorax’s insectoid wings made a couple weak and involuntary buzzes, but it was doubtful he could move very far while he remained hanging in those metal chains above his head.

By the time Pharynx finally pulled out of his brother, Thorax was nearly comatose while he hung limply in his restraints. His massively swollen ballsack continued to dangle between his newly hollowed legs, and carried a very bright hue of green to reveal the massive brood developing within his body. With a long and relieved hiss, Pharynx landed back onto the ground while looking up at his bound brother. The General’s smile carried a look of self-satisfaction for what he was able to accomplish on his own, and maybe a hint of jealousy as he saw the changeling’s member still erect; even though it was unlikely he would be able to ejaculate until those eggs were laid, a small trickle of Chrysalis’ luminescent green ooze was seeping out from the tip of Thorax’s rigid and twitching cock.

Pharynx shuddered antsily upon seeing that, but he closed his eyes to keep himself in focus. Even though the hard part was over, he knew that there was still a lot to do to ensure his Queen’s plans would come to full fruition. So while the dereformed and oviposited Thorax laid nearly lifeless in his bondage, his brother went back to work as he enveloped himself in another gust of green flame. When the changeling turned himself back into a mimic of the now former King Thorax, he smirked evilly up at his captor with his eyes narrowed in determination.

“I know you probably can’t hear me right now,” he said as he gave a light shrug of his shoulders, “but if it makes you feel any better, Chrysalis was able to obtain Shining Armor up in the Crystal Empire already, along with most of his troops. So if it means anything, you weren’t the first to fail~”

The fake Thorax then began to talk away, and used his magic to pull away that boulder to reveal the exit once more. And as the blinding light enveloped that cavern, and caused the bound Thorax to shudder involuntarily, the imposter paused at the opening to look back at him, and said, “Now if you excuse me, I need to inform our Queen of your disposal, and get to work on arranging a… ‘Peaceful’ Surrender upon her arrival~”

While Thorax was left hanging in utter defeat, unable to even react to his brother’s horrifying plans, all that he was able to hear was Pharynx’s maniacal laughter before that boulder closed once again. And as the darkness returned within the cavern, the fallen King was left all alone with nothing but Chrysalis’ eggs, and the long bout of time needed to make them ready for laying…

Author's Note

Hey, guys! If you're wanting to read about what happened to Shining Armor, be sure to check out Shining's Return to the Brood.

Also, if you're wanting to help support my fanfiction writing, and also get early-access to all of my upcoming projects, then I would recommend checking out my Official Patreon Page!