Cadance lay on the polished crystal floor, naked but for the metal collar around her neck. From it departed a thick metal chain, fairly long to allow her some degree of mobility, the other end secured to a hoop at the base of the crystal throne. Two smaller, lighter chains were also attached to the D shaped ring hanging from her neck, their short length connected to the rings piercing her nipples. She lay on her side, one hand massaging her visibly pregnant belly, while she dutifully lapped at the bowl of cum in front of her, savouring every drop of it. Her other hand was busy lazily pumping in and out of her cunt, stoking the fires of her constant and ever-present arousal. Her turn would come shortly.

Behind her, sitting on the throne, completely naked as well, Shining examined some papers he was holding up in his telekinesis with a slightly bored expression. He opened his mouth, taking in one of the grapes he was being fed, and nodded to one of the mares at his side to be a little slower in her fanning motions. He then gave a jerk of his head to the one next to her, and she quickly walked behind the throne to begin massaging his shoulders. She too sported a rather noticeable pregnancy, though not as much as Cadance's, having been one of the first to be taken as part of the King's new harem. The one sucking Shining's cock was a new one though, as visible by the way her waist remained slim for the time being.

They all shared a common trait though. All the crystal mares in the throne room, whether they were standing at attention ready to feed the King, fanning him, waiting for his command to massage him, please him or dance for him, or simply standing in the room like furniture the way they'd been instructed to, whether they were young or more mature-looking, whether clearly pregnant or still slim, shared the mark that identified them as the King's property. A pink, heart-shaped light in their eyes, more or less visible depending on the amount of energy it took to enforce the spell, symbol of the way their minds had been opened to the truth of their King's supremacy.

It would fade, with time. As they became more and more accustomed to their rightful position, less and less energy would be required to upkeep the spell, until they accepted the truth fully and the need to keep them aware of it magically was no longer there. A faint outline would remain, visible if one looked the right way, and of course the shape would shine bright and vivid anew whenever the King decided to bless them by imprinting his will upon their minds again, but with time it would become impossible to tell of its presence if one didn't know to look for it. It was what allowed her to still pretend she was her old stupid self when it was needed, Cadance thought as she caught the faint shape of the mark in her own eyes while staring at her reflection in the crystal floor.

She'd had so much fun using her spell on those mares. Of course her King didn't need her, as he could simply syphon her powers and do it himself, but he often enjoyed having her flood the new slaves' minds with her own memories. He said it helped them understand. That reminded her, her supplies had filled up again. Her horn began to glow, as the gossamer trail connecting it to her King's lit up and she began to feed more of her powers to him, moaning as she did. She looked at him, returning his smile, then her eyes drifted to the mare in front of him. Her hand was jerking up and down his length in slow strokes, while her lips remained wrapped around his tip, her head bobbing up and down slightly as she sucked in her cheeks and ran her tongue over the top of his shaft. A thought occurred to Cadance. "My King?" she asked.

Shining stopped a mare intent on offering him a glass of water and set his papers to the side for a moment. "What is it, slut?"

Cadance rolled partly on her back to better look at him. "Have you thought about reintroducing the Jus Primae Noctis? It seems like such a waste to deprive mares of experiencing your magnificence, they all should have a chance to feel what it's like to be with a real King, even if they won't join your harem." The alicorn idly played with a stand of her mane, then burst into small giggles. "Though I'm sure that wouldn't be appreciated by the stallions. Poor things, forced to marry mares they'll never be able to satisfy after they've had a taste of you. And poor mares, forced to live their lives with someone who can't hope to compete with the King. You'd have to end up taking them in the harem, even the ugly ones!" she said, exploding into laughter.

Shining chuckled. "How utterly depraved a thought," he said, bringing a hoof forward to caress Cadance's belly, "just the way I want you." His hoof moved lower, now teasing the alicorn's sex. "Though ugly mares and stallions will be a thing of the past once Sunny's studies in body manipulation magic are complete. Or once Celestia will take her place alongside you, whichever will come first. Still, we need a workforce for the time being, can't turn the whole world into my harem just yet. I might need some sons after all." With a flash of his horn, he bound the arms of the mare sucking him off to her back, and pushed her head in deeper, forcing his cock in her throat as he came inside her. After he'd finished, he let go of her, and the mare crawled away, cum dripping from her mouth, as another one took her place servicing his still hard cock.

A sound came from the end of the room, and both Shining and Cadance looked up to see a mare step inside. She wore only a starry blue cape over her naked orange body, concealing her modest chest but not her pregnancy, and a round pair of glasses on her nose. She made her way quickly across the floor, white hooves clacking on the polished crystal, and stopped in front of the throne with a small bow, a deep blush across her face and a letter in her hands, her gaze pointed to the side.

"Ah, Sunny!" Shining greeted her. "We were just talking about you. How is Flurry doing?"

The mare who had been Sunburst blushed even harder as she was addressed, her thighs squirming together as she began to leak from her marehood. "The young Princess is doing wonderfully, my King," she huskily breathed. "She will grow up to be a perfect cocksleeve for you, just as you asked."

Shining clicked his tongue. "Great news." He took hold of Sunny's head with his magic and forced her to look at him.

The unicorn's breath grew harder and deeper, her blush deepening even further and spreading to the small slopes of her chest as she stared at her King with absolute adoration in her eyes, a line of drool escaping her mouth. "I..." She shook her head and looked away, pursing her lips and blushing harder still. "I-I have a letter," she said, extending the envelope towards Shining.

The white unicorn grabbed the envelope in his magic and gently opened it, surveying the contents with an interested gaze, a smile spreading on his lips.

"What is it, dear?" Cadance asked.

Shining set the letter down. "A formal invitation by a foreign leader to a meeting meant to reinforce existing bonds through mutual participation in informal activities designed to induce feelings of closeness between ponies."

"Oh?" Cadance adjusted her position.

"Twily wants to hang out with us," he explained, cutting off his joke. "It has been quite a while since we last saw each other, really." He reclined back in his throne, broadly grinning to himself. "Perhaps it's time I pay her a visit."

Author's Note

Because I feel compelled to say it, and in case it wasn't obvious: the relationship portrayed here isn't a healthy one, and the twisted version of a D/s relationship the story presents isn't representative of my views on the matter or of how such a thing works in real life. It's porn, and the contents are meant to be morally wrong, that's the reason why it was written in the first place. This type of content is enjoyed because it isn't something one would ever consider replicating, and because one knows it's the wrong thing. The entire appeal of something like this is the enjoyment you get out of experiencing something that's utterly wrong, without the moral consequences of having actually done something like it. I don't like it because it's something I would like to do, I like it because it's something I would never even conceive of doing, and its inherent appeal lies in the knowledge itself that it isn't the right thing.

As always, remember to leave a like if you like this, and thank you for taking the time to read through all of this.