“With your permission, Dame Trixie, I will take things from here,” Celestia said, the flowing black of the suit contrasting brilliantly with the little alabaster fur that was still visible. Celestia’s wings had been trapped, her body invaded by twin shafts buried deeply in her sex and ass, but none of it appeared to bother her in any way as her magenta eyes swept over the scene at large, before spying a riding crop and a harness lying on the floor near the pair.

‘Perfect,’ Celestia thought to herself. ‘These will do nicely.’

Without further ado, she reminded Breaker of her presence by neatly clearing her throat. Breaker whirled about, nearly knocking Trixie off her hooves as the force of her swinging flanks buffeted the Knight of Twilight aside.

“You!” Breaker snarled, her eyes narrowing with suspicion and rage. “My suit… my collar, they defeated you!”

The original Celestia chuckled in response, looking relatively nonplussed as she drank from a tiny bottle Trixie offered her. Then with a bit of skill that belied centuries of training, she flipped the riding crop onto a hoof with a well placed pawing motion then paused.

“Trixie, could you please take 143 and go check on the others please?” Celestia asked, noticing with a smile that the showmare’s eyes were tracking the crop. “Now please.”

“Trixie does not mind wait—” began Twilight’s knight, sending the Zodiac Sword back to its home in otherspace.

“Obey me, Trixie,” Celestia said, putting some weight into her voice and force of will into the eye contact she made with their saviour. “Later on, we can talk about… rewards.”

“As you command, Princess,” Trixie replied, bowing low and keeping herself that way as she backed out of the room, 143 against her side.

Breaker’s eyes were drawn by the gesture of subservience, shifting her attention away from Twilight and Bookworm in the process and while Celestia’s restored golden magic picked up the harness in a languid motion, it was the motion of the riding crop that had Breaker's attention. Bringing herself up to her full height, Celestia turned on her captive and used the Royal Canterlot Voice to bring power to her command of:

"Kneel."

As the magic from the ability struck Breaker like a dagger to the heart, she was unable to resist the command and quite unexpectedly found herself obeying. Confusion and irritation flashed across the darker counterpart’s face, mostly because despite straining against the invisible bonds she could not resist. “What is this?” She demanded, looking almost like an angry crab on the floor.

The crack of the riding crop sounded like a gunshot in the otherwise still room, taking the kneeling Celestia by complete surprise as it impacted before she had even noticed it moving, startling the harnessed mare in a way that caused Twilight's Celestia to grin broadly in a way that caused a shiver to run down Twilight’s spine as she observed the unfolding drama. Slowly, lazily, the riding crop was lifted in golden magic to strike again, gently at first so as not to cause too much pain. Yet. Even with the bloom of the impacts growing over Breaker’s rump, the harness was being moved into place to capture the invading princess as smoothly as possible.

Celestia smirked as the riding crop warmed up her enemy, who'd not even noticed the harness now binding her wings in place. "What did you say you called yourself again? Control Prime?" Tia asked, rhetorically, as she chuckled softly into a husky purr while the suit milking at her teats bubbled up a modicum of pleasure.

"Well, you can call me Mistress." With that, Tia used a flurry of erotic blows at the entrance to her counterpart's rather moist core before swiftly bringing out a familiar machine. "And you have been a very bad girl, Tia of the Roaman court."

Methodically with a skill honed over a thousand years, she hooked up Breaker to the breeding rack, tightening each strap with insatiable desire and locking down every buckle with a firmness that told Twilight that the invader of her home wasn’t going to be moving unless her mentor desired it. "I'm going to fuck you and use you until you beg me to stop, and when you do I'm going to fuck you myself. Because that's how you break someone into subservience, my dear."

“Fuck you,” cursed the rogue alicorn, just before Celestia trapped her tongue beneath a spoon bit.

“That’s the idea,” Celestia murmured into a snow white ear while tightening the securing bridle so hard it dimpled the flesh beneath. “That is so definitely the idea.”

Twilight’s teacher stepped back and watched as her bound prize did her best to free herself from the breeding block. The pony who had invaded her lands, hurt her student and tried to enslave her ponies bucked and heaved at her bonds, straining with all of her celestial strength and will. And although the straps creaked not a single piece stretched, gave way or even loosened. Not the harness, not the cuffs that held her legs apart, not the tailcuff that left her marehood exposed and ready, not even the bridle that controlled her head and trapped her voice.

Every single inch of alicorn flesh was completely at Celestia’s mercy, to use and abuse as she saw fit.

Celestia sent a smoldering look over to her one-time student, pinning Twilight in place with her eyes. The lavender mare had one hoof down over her privates, and Celestia could see the dampness, smelling mulberry tinged arousal from the lovely young thing that had learned so much from her, and was about to learn so much more.

“You may continue, my dearest student, but you will only allow yourself to cum when she does,” Celestia ordered in a voice rich with the tones of command and desire. It was the voice of a mare used to being obeyed, and who expected that her orders would be followed. In all things.

Jerkily, Twilight nodded her agreement and obedience, finding herself just as tightly bound as their prisoner, but with chains made of Celestia’s will instead of leather and steel.

“Shhhh,” Celestia whispered, not knowing that the mare had already been rendered mute, but now made silent in a way more sure than any gag or muzzle or collar could. “I said you could cum, but you will make no attempt to speak. Do you understand my intent, my faithful student?”

Twilight’s repeated nod lurched back and forth in time with the motions of her hoof, as it continued moving over her delicate nub. The action sent jolts of heated lightning through her body, and she realized that she did understand what her dearly loved and ardently desired mentor intended to teach her this day.

Celestia was showing her that dominance wasn’t whips, chains and collars. Dominance was desire, controlled. Dominance was will, exercised. Dominance was control, desired. It was a loop that came back on itself in a perfect circle that bound dominant to submissive and submissive to dominant.

In that moment, if Celestia had held out an open collar, Twilight would have gladly placed her throat in its unbreachable circle and allowed, no begged, for it to be sealed in place. Such was the power of undeniable will from a being who had spent a millennia in caring control of both herself and others.

“Now as for you,” Celestia began, delivering a strong nip to the tip of the rogue’s ear that drew an inarticulate squeal from the mare. “I want you to fight me. I want you to struggle, and buck and try to resist me. I want you to give my student a good show. Can you do that for me, Cake Flank?”

An incomprehensible growl of anger and denial rose from the bound pony, only to devolve into a series of pained cries as Celestia unleashed a flurry of blows with the crop she had retrieved with her magic.

“Yes, that’s going to be your name from now on. ‘Cake Flank’,” Celestia informed the alicorn beneath her. Twilight’s hoof sped in its movement as she noticed her teacher picking up a long braided whip in her magic and holding it out in front so that Cake Flank could see it.

“Nuh nuh,” begged the mare, taking in the coiled leather and dreading what it could do to her flesh.

“Oh? You think I’m going to whip you?” Celestia asked, giving her opposite a closeup view of the strands of leather. A princess deserved to own only the best things. Whether it be jewellery, furniture, or instruments of pain and delight, and interestingly enough, Twilight had been buying some of the best there was.

Cake Flank nodded as best she could. The martingale attached to her bridle kept her head nearly immobile, but there was enough slack for her to convey her fear that she was about to be whipped and brutally so.

“I would never whip one of my ponies,” Celestia stated, allowing her slave a moment to relax, then coiling the braided line around Cake Flank's throat like a long collar made from a single leathern snake. “But then again, you aren’t one of my ponies, are you?”

Cake Flank had just enough time to whinny out a plea before Celestia tightened the whip like an anaconda grasping its prey, cutting off her captive’s wind. Celestia held the mare like that for a long, long minute. Long enough for Cake Flank to begin to struggle, before releasing the tension and allowing the mare to breathe again.

“Now then, Twilight. Note that our new mare has just learned her first lesson from us,” Celestia commented as she froze her student in place again with her eyes. “She’s learned that we hold the power of life and death over her, to use as We see fit. And that she has no say at all in the matter. Isn’t that right, Cake Flank?”

Cake Flank’s frantic nodding sent the now loose ends of the whip bouncing against the fronts of both her shoulders.

“Good girl,” Celestia praised, easing herself back to the rear of the secured female. “And now for the second lesson. We will teach Cake Flank that we also have the right to decide whether she feels either pleasure or pain.”

Cake Flank braced herself as best she could for the onslaught that she knew was about to come. Whether or not the stinging blows of the crop or the biting constriction of the whip, she held herself ready for whatever Celestia was about to hurt her with. Which is why the soft touch of a velvet tongue gliding up her weeping inner folds shocked her into a moment of total mindlessness.

A second gliding stroke up the opposite side of her holy entrance and around her clit had her gasping for breath even as it caused her to lose control of her legs, the limbs spasming outward and only the tight bonds of her harness to the breeding block kept her from falling to the floor.

Bracing her hooves up on either side of Cake Flank’s bound tail Celestia leaned forward, driving her muzzle deep into the rich dark tunnel of the captive mare, spreading the passage wide as she drank deep of the rich scent that she herself had smelled far too rarely over the long, long years.

“I really should thank you, Cake Flank,” Celestia said, her muzzle gleaming wetly with the juices of what she was sure was going to become one of her favorite diversions. “I’ve wanted somepony like you for decades. Somepony as strong and as durable as me. A pony that would be with me for all the long years ahead. And then you came here, invaded the home of one of my nearest and dearest, and gave me all the excuses I needed to keep you here forever. As mine.”

Cake Flank barely understood what Celestia was saying, so powerful had been the switch from terrible pain to joyful delight. And even if she had, it wouldn’t have mattered as the spoon on her bit kept her tongue pinned, preventing even a single understandable syllable from escaping her mouth.

Celestia dove her muzzle back into the soft strength that was the increasingly wet core of Cake Flank, gliding her tongue along the soft folds of the pony’s entrance and lashing the ever rising nub of flesh until Cake Flank began to tense up. Every muscle from her most sacred place outward gearing towards a release designed by one who had been trained for years in the erotic arts. Celestia felt the growing tension, tasted the beginnings of that most wonderful of frissons…

And then brought the crop across the tips of Cake Flank’s teats with a slash whose speed rivaled that of a sonic rainboom.

Cake Flank promptly erupted into a thunderous orgasm that ripped out of her with a force beyond belief. So powerful was the carnal outburst that Celestia was forced to duck as her captive released a literal jet of musky liquid from her spasming core, traveling in a great arc to splash against the far wall.

Another splattering sound drew Celestia’s attention and turning, she saw that her faithful student had been obedient to her commands and held her own orgasm until that very moment.

“Well done, my little pony,” Celestia declared, taking a moment to step over and give Twilight a brief nuzzle of praise. Twilight, nearly mindless after the climax of some of her darkest fantasies, merely lifted her chin up and to one side, revealing the control collar of the suit bonded to her in wordless offering.

“I accept, Twilight,” Celestia stated softly. “But not right now. I’ve only started to break this pony to her saddle, and there is much more to be done before Cake Flank learns all that I have to teach her.”

It was three hours later and the other Princess of the Sun had been reduced to a pleading mess of trapped wings, fur and fluids. The tongue bit had at some point been removed to allow Cake Flank’s throat to be used, and so she was free to speak once again.

"Please, I can't take any more. I'll go back to my world. I'll do anything," the bound mare begged.

"Now, I hope you’re still taking notes, Twilight," cooed Celestia, savouring the sensations she had denied herself for at least two centuries. "Because this is how you finish fucking someone into utterly submissive servitude. And the best part? Once her body recovers she'll beg me to do it all over again."

Effortlessly chanting a spell that caused her teats to swell slightly, a sudden girth appeared under her belly which promptly engorged with the desire that coursed through Celestia’s body like the thunder crashing across the sky in a storm. She was fully erect in an instant, and eyed her counterpart’s entrance with a mildly critical eye. Yes, she’d be able to take this. Her shaft was no bigger than the ones that had broken her in ancient Roam, so it would not be any worse than what she’d endured before.

Without any further hesitation, Celestia reared up onto her hind legs, bracing herself on her enemy’s hips while she probed for the entrance with a cock that already glistened with precum. Finding that soft, aching yield of flesh was like a silken vise welcoming her home, Celestia pushed her way inside with a ground out moan of satisfaction. It was a little weird to realize that she was technically fucking herself, but since this was the perfect opportunity to both slake her lust and break her enemy she wasn’t going to pass it up on account of a little bit of strangeness.

"No, no. You can't. I won't. You can't make meeEEE!," shrieked Cake Flank as the big white mare atop her proceeded to plow the productive new field Celestia’s favorite student had found for her.

Her skill was unmatched, moving with power and force before shifting into more lazy undulations that provoked deep, guttural moaning from the mare under her. While the thrusting seemed erratic on the surface, Celestia was quite carefully driving the rogue princess into madness by fucking her while being simultaneously denying the orgasm her counterpart craved with greater and greater desperation.

Harder, deeper, faster, Celestia thrust over and over and over while savoring the sensations of the flesh gripping at her shaft, enticing her to move ever closer to climax and spill her seed into the fertile womb within. With a sudden motion of her magic, the golden light enveloped the abandoned riding crop and had it slap the invading princess’ rump while her telekinesis formed hooves to stroke, caress, tease and deny with increasing tempo.

Telekinetic hooves fondled Cake Flank’s teats while tongues of magic lapped at the swaying nipples as surely as though two other ponies had joined them. While the cock slamming in and out of the pussy was completely physical, one made of shimmering aura found itself probing and teasing the anal entrance like a needy stallion. As it entered the other hole, the bound alicorn found herself moaning with a querulous agony that threatened to rattle the windows within their frames.

“Ohh fffffFUCK Cake Flank,” Celestia gasped out, sweat forming on her fur from the efforts of breeding. “You’re so fucking tight for me.”

Hips moving as though she was racing to an imaginary summit, Celestia’s senses narrowed while her telekinetic assistants worked into a frenzy. With an earth-shattering whinny, she thrust one last time while pumping her seed into the dripping passage of Cake Flank’s canal. Two other cries echoed hers, one being the now quivering mass that was the other Princess of the Sun, and the other being a furiously clopping Twilight Sparkle who’d been unable to resist the show.

Withdrawing neatly after catching her breath, the counterspell was uttered that returned the solar alicorn to complete marehood again. From there she walked around to the front of the device that held the usurper still.

“Release me from this suit,” she commanded evenly.

“Yes Mistress,” was the quiet response from Cake Flank. “Suit 1000, recognize Control Prime.”

“Recognized,” replied the collar. “Initial configuration for 1000?”

“Release.”

“Password?” the collar prompted. The neutral voice seemed more startling than if it had replied with any emotion.

“Solaris,” Cake Flank intoned, her voice resigned.

With a soft beep, the ichor that had spread across Celestia’s body promptly retreated into the collar, which a few moments later clicked open and fell harmlessly onto the floor.

“Good girl,” Celestia praised. “Now undo what you’ve done to my student.”

Bleary eyes lifted until they made contact with the eyes of the much younger alicorn some feet away, and she connected to the collar resting on a black coated lavender neck.

“Suit 614, recognize Control Prime,” she commanded wearily.

“Recognized,” replied the other collar. “Configuration for 614?”

“Release all restrictions, release sole Control Prime mode, revert to previous configuration.”

“Password?” the collar prompted. The neutral voice was once more monotone in its responses.

“Solaris,” Cake Flank said, all of the wind drained from her sails.

The other suit then reverted to how Twilight Sparkle had originally had it, the soft beep alerting her when it was done. Tearing her eyes away from her former captive, Cake Flank lay muted and spent within the breeding rack.

“Excellent work, Cake Flank,” Celestia purred, stroking a hoof over the sweaty face of her other self. “I think this warrants a reward.”

With that she swung herself around, lifting her tail high and proud while revealing a glistening crevice. There was no real way for the bound mare to object to it being shoved into her face, but the instinct was there to dip her muzzle into the slippery depths and deftly use her tongue. Celestia moaned in abject approval, leaning into the ministrations that weren’t too far off from her own abilities.

The scent of her arousal began to fill the room again while she was feasted on, and this time she locked her gaze onto Twilight who still stood frozen in place.

“Come here, my faithful student,” Celestia commanded, her voice as gentle as a spring breeze. “I think you’ve suffered without release long enough.”

Transfixed, Twilight Sparkle moved forwards as though she was walking on air. Her heart thudded in her ribcage, all thought to do anything else wiped as cleanly from her mind as though she’d been put under a spell. Pausing a short distance away, the young alicorn awaited the next set of commands.

“Present yourself to me,” Celestia murmured. “I know you ache for more than the paltry release of your hooves.”

A deep shudder went through Twilight, and she found herself obeying with a dreamy gracefulness to her motions. Turning around, she lifted her tail to reveal her own swollen nethers that were begging for release despite her reaching climax twice. Part of her held her breath while waiting to see what would happen next, and the other was furiously taking mental notes.

“You’re so wet, little one,” Celestia purred. “I think your lessons have taught you well today.” Instead of waiting for a response she plunged her face into the sensual garden of her student, lashing with her tongue and bringing the young alicorn into a swift frenzy.

Rocking back and forth against the mouth ravaging her, Twilight Sparkle let out gasps of pleasure while her hind legs quivered with approaching release. At the critical moment, Celestia grabbed the riding crop and struck twice in rapid succession.

“Cum!” She roared as she did so, and Twilight couldn’t have disobeyed even if she’d wanted to. The sudden flare of pain knocked her over the threshold of release, and she sprayed her juices in a powerful orgasm.

Seconds later Celestia’s own cries filled the room as she too orgasmed, and she took a moment before moving away from her prisoner. “I believe this will be enough for now,” she murmured thoughtfully. “I will need to rest and regain my strength before deciding what to do with my newest acquisition.”

Cake Flank was too fatigued to raise her head in response, merely let it hang while she drifted off in exhausted sleep.

Co-writing credit for this bonus chapter definitely belongs to my editor, Coyotethetrickster who said to me one night, "Isn't it about time Celestia had some fun?"

Four hours later we had banged this together by throwing paragraphs at each other and editing like mad things. More editing after writing the fight chapter to fit how that chapter turned out and we had an extra chapter waiting in the wings for just this moment. We hope it satisfies.

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