All's Fair...

Shining adjusted his cloak as he peered into the foreboding cavern entrance laying before him. The air was cold and biting, the harsh wasteland was unforgiving as he remembered it being, and there were any number of things he’d rather be doing than exploring some frigid grotto by his lonesome, yet he steeled himself and trotted into the gloom. Sending power into his horn, he cast a rosy light to illuminate his way.

While he cautiously delved deeper and listened to the whipping wind outside, his thoughts darkened. He could have - heck, he probably should have sent a contingent of guards to investigate the magical anomaly, but he wasn’t about to take any chances. Slowing to a halt, he gave a frustrated sigh.

It was exceptionally rare for him to personally deal with problems. Being the Prince of a kingdom, and having the most loving wife in the world, meant he was busy more often than not - on top of that, he had his daughter, Flurry, to think about. There wasn’t much that would have him go out on an expedition, and fewer still that would cause him to go alone, but this required his immediate attention.

Sombra - the name alone was spoken of in feared, hushed whispers. Even after he’d been vanquished a handful of times, with the most recent being at the hands of Twilight Sparkle and the Elements of Harmony, the lingering scars he’d cast upon the ponies of the Crystal Empire endured. If there was even the smallest risk that the King had somehow returned, having clawed his way back from whatever infernal abyss he’d been cast to, he needed to be stopped before he could hurt anypony.

Shining to his left and right, down opposing tunnels that led deeper into the earth. There’d been a faint disturbance involving dark magic the night prior, one that even Sunburst had barely detected, and it was his job to determine what was going on. The whole entire affair was probably just a wild goose chase, likely just some crystals compressing or shattering under a glacial flow, although there was only one way to be sure.

With his breath fogging before him, Shining cleared his throat. “Hello?”

The call echoed away and gradually faded into oblivion. This was a waste of time. If Sombra really had come back, he would have felt some trace of umbral sorcery by now - plus there was the matter of subtlety. Sombra was a great many things, tyrannical and menacing being only two, yet he wasn’t one to lay traps or scheme.

Shining went to turn, refocused the power flowing through his horn, and froze. It was only when the light around him had faded, wreathing him in pitch blackness as he prepared to teleport back to the castle, that he saw it. Coming from deeper in the cave, there was a dim glow.

“Great,” he groused.

He wasn’t sure exactly what was going on, although he could make an educated guess. For some reason or another, there were ponies who viewed Sombra with reverence; such unhinged individuals, while troublesome, never really amounted to much - be that as it may, they would be dealt with and shown the error of their misguided ways. Pulling his cloak tighter, he lowered his head and stealthy pressed onward.

The passage he crept through took a turn and opened into a massive, icy chamber that was decidedly unnatural. As if the smooth surfaces of the ceiling, floors, and walls weren’t unnerving enough, standing in sharp contrast to the craggy tunnel he’d just gone through, there was a throne sitting squarely in the center of the room. As his eyes scanned the area, looking for any potential threat, the foundations of several offensive and defensive spells swirled about his mind.

What started as an ominous chuckle coming from everywhere and nowhere at once grew into a cruel laugh. The sound was unsettling, more than enough to disquiet anypony, yet it soothed his nerves. Whoever or whatever he’d just stumbled upon, having a distinctly marish voice, wasn’t anything he couldn’t handle.

“Ha ha ha,” he sarcastically clucked while straightening up. “Want to let me in on the joke?”

“I would,” his unseen host purred, “although I’d hate to spoil the fun. Are you alone?”

Waving his arms around himself, Shining scrunched his snout. “What’s it look like? Listen, I’m sure you’re having a great time in this little hovel of yours, and you did a fine job making that chair, but I’ve got better things to do than stand around freezing my but off.”

“Freezing?” the voice quipped. “My most sincere apologies, Prince Shining Armor. Perhaps I could heat things up a bit for you…”

Shadows billowed from behind the crystalline throne, consuming it and shrouding a large portion of the chamber in darkness, a rhythmic tapping cut through the air. Click Click Click- as the noise grew louder and more distinct, Shining’s hackles raised. With crimson eyes, a twisted smirk, and a flowing black mane, a figure emerged.

Shining’s jaw nearly hit the floor. The carmine horn, grey coat, and menacing gaze were unmistakable, the very things he occasionally had nightmares about, yet what he was seeing didn’t make the slightest bit of sense. Sombra was a stallion, and an imposing one at that, not a tall, curvaceous mare.

“It’s so good to be back,” she groaned as she ran her hands over her expansive bust, down her slender waist, and to her broad, foal-bearing hips. “What’s the matter, Shiny, cat got your -”

“S…Sombra?” Shining croaked, finally finding his voice.

Smiling all the broader, she cupped and squeezed her heaving bosoms. “In the flesh, dear.”

He couldn’t bring himself to look away from her, so he did the next best thing - he pinched the bridge of his snout and closed his eyes. Whoever this was, they were evidently a fan of Sombra - an utterly shameless and slatternly fan, but a fan all the same. With the faintest hint of blush in his cheeks, he snorted in frustration.

“I don’t care who you are, you’re coming with me,” he grumbled. “I’ll -”

“Kneel,” she coolly interrupted.

Scowling over at her, he set his jaw. This mare obviously had a few screws loose, even if she’d momentarily duped him into thinking she was some whorish incarnation of the would-be despot, and he felt certain the psychologists back at the Crystal Empire would have a field day with her. Snickering to himself, he wagged a finger.

“Circling back for a second - yeah, you are pretty funny,” he mused. “The cape is on point, basically perfect, but the real Sombra wouldn’t be caught dead wearing all that.”

Following the flippant wave of his hand, she peered down at herself. “I’ll confess, I thought the same thing myself at first, although it would be a crime not to show all this off ~ wouldn’t you say?”

As if drawn by her words, his eyes drifted down from her face. He’d met more mares than he could count over the years, including Princess Celestia and Princess Cadance on numerous occasions, although not a single one of them could rival what this Sombra wannabe in sexual appeal. He kept his distance while he inspected her and drank in her admittedly alluring figure.

For starters, being nearly a foot taller than himself, she had him beat in the height department - secondly and even more glaringly, to call her voluptuous would be an understatement. Her tits were bigger than his head, she had legs for days, and her thighs - mother of mercy, her thighs were the perfect blend of muscle and plumpness. He had no idea who she really was, but he’d be lying if he said she wasn’t stunning.

“Ah,” she sighed, “I see you’re appreciating my assets - here, allow me…”

Turning away from him, she flung her cape over her shoulder. Her attire, consisting of a sling bikini top, thong, leggings, and stiletto heels left perilously little to the imagination - better or worse still, for he couldn’t honestly say which, she was none too modest about showing herself off. As she slowly bent forward and splayed her legs, grinning over her shoulder all the while, his heart skipped a beat.

She giggled and drew her tongue over her fangs while she swayed her hips from side to side. “I won’t complain about this new body, however…”

“H…however?” Shining stammered, unable to tear his gaze from the glistening, wet fabric clinging to her plump nethers.

Reaching between her udder-like breasts, she pawed at her crotch. “The marehood, Shining, it’s just dreadful. Whenever I think of you, the ache becomes nearly unbearable.”

Shining swallowed hard, his mouth instantaneously watering, and blood surged to his loins. Though he was a faithful stallion and husband, never once having stepped outside his marriage to sate himself with anypony, there had been several times when he’d been tempted to sin. Averting his gaze to spare himself the ignominy of getting a boner while dealing with a lunatic, he growled.

“Well I’m sorry to hear it,” he huffed. “Once we get back to civilization, I bet you’ll have plenty of -”

“Of what?” she breathed.

She was on him in a flash, so quickly that he had no time to react whatsoever, and his face was nearly buried in her cleavage as she loomed over him. Suddenly finding himself staring at two of the biggest tits he’d ever seen would have been bad, although that was only the tip of the iceberg. Shying back and drawing a breath, preparing to firmly but politely tell her she could find some poor sap to scratch her amorous itch elsewhere, he shuddered.

The aroma wafting off her was incredible, like a blend of bestial passion and exotic flowers, and it rocked him to his very core. While he was fully aware that each mare’s scent was slightly different, he was unprepared for the olfactory assault on his senses. Fighting the urge to step forward entomb his muzzle in the valley of her bosoms, he felt his pants tighten.

“Of what, Shiny?” she pressed. Resting one hand on his shoulder, she brought a finger under his chin and lifted his face. “I’ll have plenty of what?”

“I - Ahem -” he weakly coughed, finding it hard to speak. “Plenty of stallions.”

“But I don’t want plenty of stallions,” she cooed, “I want you ~ is that not apparent?”

His slacks tented and railed against his growing erection while sinful, self-indulgent thoughts invaded his mind. Summoning every ounce of restraint he had, he slapped her arm away and leapt back. No - buck no. He had never cheated on his wife, and he sure as heck wasn’t going to stick his dick in some crazy mare lurking in a cave!

She rolled her eyes and folded her arms under her immense bust as he reached for his sword. “Shiny, you wound me. After all these years, all the history we have, I would have thought you’d be elated to subdue and conquer me once and for all…”

“You’re not Sombra,” he insisted through gritted teeth. “You’re just some wacko who -”

“Oh but I am Sombra,” she hissed in his ear.

His blood ran cold, his heart sank, and a cold pit formed in his stomach as a pair of hands ran up his back. What was happening? How had she gotten behind him so quickly? Who was this mare? Unsure of what to do or say, if anything should be said at all, he was drawn back and held in her embrace.

Sandwiching his head in her bust, she caressed his chest. “The sooner you accept that it’s me, the quicker you can cast me into a little dungeon and keep me as your pet. You’d be a hero, you know, sparing the citizenry of such a malign force - granted, I can’t say your wife would approve of you having a concubine, but that will be our little secret ~ won’t it?”

“I…” he rasped.

It would be so easy - so incredibly easy to give her a roll in the hay. Nopony would believe her word over his, seeing as how she was clearly insane, and everypony knew he was a devoted husband and father - furthermore, for all he knew, she would claim they got frisky anyways! Wriggling free from her clutches, he marched forward, turned on his heel, and drew his blade.

“We are not doing that,” he snarled. “Come back with me peacefully, or else…”

“Or else what?” she cackled. Defiantly strutting to him and pushing the tip of his sword down with a finger, she locked eyes with him. “How about this ~ if you’re insistent on making this hard, you run back to the castle, gather as many guards as you can, then you may be able to overpower me.”

He balked as she sauntered past him and toward the throne. “I don’t want to hurt you.”

“You couldn’t if you tried,” she tutted without sparing him a glance. Spinning and easing herself down, she swung one leg over the arm of the chair. “Go on, the exit’s right where you left it.”

Every ounce of common sense Shining had implored him to leave, if only to return with a platoon of armed and armored royal guard to corroborate his story, yet he couldn’t budge - not because he was held captive in any meaningful way, but because of what Sombra did. Tweaking her right nipple with one hand, while rubbing her marehood with the other, she reclined and gave a deep, guttural groan.

He’d seen strippers who would struggle to put on a show that came close to the depraved display she was putting on. While he couldn’t see everything she had to offer, what with her nipples and nethers still covered, the bawdy spectacle sang a siren’s song to his stallionly wants. Gripped with indecision, he fidgeted in place.

Cadance was a loving wife, impeccable mother, and had a body that was the envy of many mares - still, Sombra was in a league of her own. The deranged, wanton mare’s incredible stature would have made her captivating enough in and of itself, yet her mountainous rack, physique, and imperious, almost haughty demeanor made her a walking avatar of lust.

“Aaaaaaaaghn,” she cried, her voice sending a shiver up his spine. “It’s so awful,” she whined while peeking out at him with a single, heavily-lidded eye. “I’d - Nnnnf - always assumed intrusive erections were worrisome, but this is so much worse…”

If the feeling she was grappling with was anything remotely similar discomfort wracking him, he could genuinely sympathize. His stallionhood was so hard that it hurt, genuinely hurt, and the fabric of his slacks was straining to contain it. As lightly tugged at one side of her top and caused a gargantuan to spill out and into the open, a bead of pre-cum slipped from his cock-head.

“And the leaking - Ugh,” she pouted. Shifting course and tugging her panties aside, she spread her meaty, lower-lips to reveal her succulent, pink interior. “Whenever you traipse through this cute little head of mine, I get so wet…”

With his curiosity getting the better of him, he met her gaze. “Why though - I mean, if you really are Sombra, why would you be so interested in me?”

She smoothly slipped a pair of slender digits into herself while looking into his eyes. “You’re one of the few who can rightfully claim to have defeated me, you captured the heart of the Princess of Love, and you’re a paragon of virility. If there were ever a stallion who was worthy to sow their seed with Queen Sombra, it’s you.”

The mere mention of sowing his seed was nearly enough to derail Shining’s train of thought, but he collected himself and focused. “Queen Sombra. So - um - what even happened with that?”

Continuing to finger herself, she shut her eyes. “It was - is my one hope of finding salvation. Since I’m clearly incapable of retaking my - pardon, your empire, it’s only right that I surrender myself and my fruitful womb to you. Should you sire a foal with me, I’ll have no other option than to forsake my wicked ways and raise your heir.”

Shining knit his brow. There was a small amount of logic to her assertion, although it was certainly a highly atypical approach. Sombra was a powerful wielder of magic, capable of feats that could equal even alicorns, so it wouldn’t be impossible for him to change his sex and gender on a whim. Pondering on the bizarre conundrum, he started as a pitiable whimper crept past her pouting lips.

“Please,” she whispered. “I’ll do anything you ask of me, just please - please find it in your heart to give me the smallest respite from these insatiable, marish urges…”

Licking his lips, he inched forward. Life had brought him to a crossroads, and there was no simple solution he could turn to. On one hand, if he brought her to back to the castle, irrespective of whether he summoned several guards to assist, she’d almost assuredly end up getting rutted by the soldiery - on the other, should he yield to his impulses and give her what she wanted, his marriage and title would be put on the line.

“If…if we do this,” he warily began, “I’ll deny it ever happened…”

Perking up practically flinging herself from the throne, Sombra fell to her knees and clasped her hands together in supplication. “Of course! Should I fall pregnant, everypony will just assume I’m carrying a bastard foal with an unknown father.”

Her jubilant tone soothed his nerves only slightly, but it was enough to sway the pendulum. The choice was made, the die cast, and he was about to do the unthinkable. With the smallest smile gracing his lips, he crossed his arms and expectantly nodded down at the throbbing bulge in his pants.

“O…of course,” she stammered. Shuffling forward on her knees, she gently placed her hands on his hips. “Allow me to serve you, my liege…”

There was something supremely gratifying about seeing a mare kneeling before him, and that enjoyment was magnified exponentially by the fact that it was none other than Sombra herself gradually loosening his belt and unbuttoning his pants. As she opened his fly and lightly tugged at his slacks, his enthusiasm grew. He may have been thrown off to discover that she’d turned herself into a mare, although she wasn’t the only one with a surprise or two.

Revealing inch after inch of his length, she held a hand to her snout and gasped. “Y…you’re huge…”

“Yeah,” he flippantly noted as his cock sprang free and into the open. “Hope you’re ready to take responsibility for that.”

She visibly gulped while wrapping her hands around his shaft. Fate had been kind to him in many different ways, yet his stallionhood was a source of constant pride. From the days he’d intimidated classmates in the locker room at school, he’d known he was extraordinarily well-hung. Stepping in and swinging his hips, he smacked his cock against Sombra’s cheek.

“I…if I may,” she stammered.

Seeing her bring a hand beneath his prolific coin purse, he chuckled. “Go ahead - after all, you’re going to make sure they’re completely drained before we leave this place.”

Keeping his eyes on her, he reveled in the sight of his nemesis, one of the only creatures he’d ever feared, worshiping him. Her touch was soft and timid, her breath hot against the tender flesh of his cock, and her stunned expression were exquisite. Since it had taken quite some time for Cadance to acclimate to his endowment, with the first few weeks of sex being more onerous than anything, it was his hope that Sombra’s massive size would make matters enjoyable for the both of them.

She gently fondled his balls while looking up and down his length. “I…I can’t take it any longer…”

Moments from asking her what she meant, Shining got his answer. Rising up and shifting around to face him, Sombra squeezed her tits together between her forearms as she opened her mouth, extended her tongue, and clutched the base of his shaft. There was still time to turn back, to preserve the sacred vows he’d made to his wife, yet the temptation proved too strong. He slowly exhaled and shivered while she wrapped her lips around his bloated cock-head.

It may have been his imagination, but her maw was absolutely phenomenal. From the way she massaged the underside of his stallionhood with her tongue to how she softly moaned around him, her devotion left nothing to be desired - or so she thought. As she leaned in and brought the tip of his length to the back of her throat, he assumed she would start sucking him off - turns out, he was only partially correct.

Taking a deep breath through her sinuses, she rammed her head forward and hilted him in her muzzle in one smooth movement. The sensation of her snug gullet, paired with her stifled gag, was enough to make him hiss with pleasure. She wasn’t playing around, literally choking herself on him without the smallest bit of hesitation, and things had only just got going.

She pulled back slowly, mopping his shaft with her lips all the way, then began swabbing her throat in earnest. Her skill was, in a word, impeccable. Cadance struggled with blowing him properly, even after all the years they’d been together, and she was was none too shy about telling him that - Sombra, on the contrary, seemed gleeful to fuck her face on him.

Straightening and reclining ever so slightly, she crushed the lower portion of his shaft in her cleavage, smiled around his cock, and winked up at him. While it was one thing to be with a mare who’d begrudgingly warm him up, it was another entirely to have a mare who was happy to slobber on his endowment. As his inner scales steadily tipped to one side, he lowered his hands and ran his fingers through his thick, luscious mane.

“Be rough,” she breathed after pulling back just enough to clear her snout, “I deserve nothing less.”

“Gladly,” he muttered.

Simultaneously rutting her muzzle and tit-fucking her, he bucked his hips while pulling her head to his crotch. Considering it had been decades since he’d been able to let himself go, caring too much for Cadance to get overly rough with her, it became increasingly difficult to hold himself back. As he ignited his horn and surrounded her nipples with his sorcerous aura, pulling and twisting the delicate buds of flesh, his libido overtook his reluctance.

“Fucking slut,” he rumbled.

She made no move to oppose him - quite the opposite, his harsh words and domineering actions only seemed to fan the flames of her arousal. Shifting and splaying her legs, she reached down to her groin. Though he couldn’t see what she was doing, the view of her loins obscured by her bust rack, it was clear what she was up to.

She’d meant it, she really did want to serve him. Plowing her tits and snout, he flashed his teeth at her. A part of him wanted to magically bind her arms behind her back and prevent her any pleasure other than what he chose to deliver, yet he abstained and allowed her to play with herself. If or when things got too heated, he’d intervene and show her that he would be the only way she got the release she so desperately craved.

Hastening his pace, he bucked his hips and relished the exquisite feelings her maw and breasts afforded. To her credit, in spite of him using her face like a sex-toy, she endured his onslaught with startling ease. She took breaths when she could while hungrily slobbering on his length and fingering herself.

Should Cadance or anypony from the Empire stumble upon him, he’d be dead - no, worse than dead. Exile would be assured, his wife would undoubtedly leave him, and he’d have to live the rest of his life knowing that his daughter had been robbed of a happy, functional family, yet what he may lose was overshadowed by what he’d gained. For the first time in ages, possibly for the first time in his life, he was in complete control.

Taking a step back, he released her and drew his stallionhood from her muzzle with a wet Pop. “Get up.”

“I - Cough - g…give me a moment,” she wheezed while wiping strands of saliva and pre-cum from her chin. “That was -”

“Get up,” he snarled. “You’re the one who asked for this, and you’re going to obey me.”

She got her feet under her, shakily stood, and kept her eyes on the floor. “M…my apolog-”

“Sit on the throne and spread your legs,” he commanded, cutting her off for a second time.

It was then, seeing her nod and stroll back to the throne to obey him without question, that he understood it. She was extremely attractive, even by alicorn standards, and the blowjob she’d given him was incredible, but it was the power, the absolute authority he wielded over her, that spurred him on. Walking over to her, he sank to one knee and pressed his muzzle to her slavering, winking cunt.

While he’d always had a weakness for making his sexual partners feel good, although this was so, so much better than that. His nemesis, the same pony who’d come just shy of destroying the kingdom he cherished so deeply, was now little more than his thrall. As he lapped at her cunt, his mind grew clouded by the intoxicating notion of bringing her to heel.

Sombra locked a leg around the back of his head, ensuring he couldn’t escape. “S…such a gracious master! I’m n…not worthy!”

Lifting his head, he gazed through the valley of her bosoms and to her face. “You’re not.”

He set upon her with renewed vigor before she could reply. The flavor of her sex was astonishing, strong and all but feral, and her silken depths spasming around his tongue only fueled his mounting lust. Whether or not he ultimately knocked her up was of little consequence, because she’d learn that he truly was her master.

The rush of the taboo, of understanding what was at stake, was a exotic spice to what was already a scandalous dish. There he was, a Prince, father, husband, and hero, and he was wantonly feasting upon a cruel ne’er-do-well’s pussy like some lucky, hormonal teenager. Casting aside his inhibitions, he nursed on her clit and earned himself a delighted squeal for his efforts.

Thoughtlessly eating her out, and stroking himself in one hand, he recoiled when she howled. Rivers of sweltering nectar gushed from her cunt, baptizing him in her juices and bringing him to a sudden standstill. He would have had every right to be upset, not for the least of which reasons being he was drenched and would reek of her until he’d gotten a chance to shower, yet the climactic spray sent him into an absolute frenzy.

He bolted upright, took her ankles in his hands, and plunged his turgid stallionhood into her. Her velvety interior was everything he could have dreamed for and more. Neither too snug nor too loose, her marehood embraced him as though it had been made for him. As he seated his cock-head against her womb, only just bottoming out within her, he leaned forward and gently bit down on her nipple.

She came in an instant, braying to the heavens while bathing his crotch in sweltering she-cum, although that did nothing to slow him down. Hammering into her, he angled his plunged to grind his medial ring around her g-spot. He’d never failed to satisfy a mare, even the handful he’d bedded before committing himself to Cadance, and he’d be darned if he was going to start now.
Rearing back and to his full height, he plowed her like a verdant field in spring. She may have been a veritable amazoness, equal parts tall, beautiful, and intimidating, but that was just a front. At the end of the day, she wasn’t any different from any other mares - a slave to their desires.

Her hand shot past her swaying bosoms and rubbed her clit as she cracked an eye and weathered his carnal offensive. “H…harder…”

He sneered and fucked her even harder than he had been already. Even with Cadance, a mare he’d been having sex with routinely for over a decade, he wasn’t able to tap into his full potential, but that was about to change. Broadening his stance and steadying himself, he pulled out all the stops.

In a fit of pique, she shook her legs free and snapped them around his waist. “Yes!!!”

His vision tunneled, his pulse raced, and his breaths came hard and heavy - nevertheless, he didn’t relent. Beating his cock against her cervix, he grimaced. He couldn’t explain it - heck, he barely even noticed it, yet he had a nagging sense that something was amiss. As he brushed aside his concern and focused on screwing her into submission, she screamed and came once again.

While minutes languidly passed, his grasp on time around him grew tenuous. Though he wasn’t tired, it felt like the world around him was fading away. It was hard to think, sweat slickened his body, and he was filled with the single-minded yearning to claim her. Shifting his attention up to her face, he smirked while she extended her arms.

“Kiss me,” she implored.

There was something wrong with her tone, like her words reverberated through every fiber of his being, yet he wasn’t strong enough to defy her. Bending forward, he snaked a hand behind her head and locked lips with her. The moment her tongue snaked into his muzzle, a jolt of energy surged through him.

His memories and passions, the very pillars his life had been built upon, faded into nonexistence. Queen Sombra - the only thing that mattered, had mattered, or would ever matter was Queen Sombra. The final thought to grace him as he was consumed, slipping beneath the unyielding tide of her will, was that he’d fallen straight into her trap.

Bringing her muzzle to the side of his head, she breathed hotly on his ear. “Cum.”

He did so in a blink, grunting and hilting her as a tide of foal-batter coursed through his flaring, pulsing stallionhood. There was no anger or regret as he bred her - instead, he was overcome with profound, soul-crushing contentment. Heaving air into his chest, he stared vacantly into her glowing, green-tinged eyes.

“Mine?” she purred.

“A…always,” he numbly responded.

Pulling him into a hug, she giggled. “As it should be…”

Shining Armor was gone - in his place was nothing more than an obedient, broken husk that had once been a proud stallion, and he knew it. A prisoner within his own mind, he was helpless to stop her - worse still, a sliver of his being was grateful that she’d chosen him. A lifetime of servitude awaited him, filled with pleasure beyond his wildest imaginings, and there was only one mare he could thank for it - his Queen…