When Lust Wins

by TotallyNotAWulf

Rating: mature
Tags: Sex, Anthro, My Little Pony: Friendship is Magic, Princess Cadance, Sad, Original Character, Porn
Length: 2866

Princess Cadence discovers the difference between love, and lust in a night of shameful passion.

When Princess Cadence first married Shining Armor, she was the happiest mare in the world. But marriage wasn't everything she imagined it would be--especially in bed. Now her eyes are starting to wander--and when they find a mare who takes her breath away...

...Her willpower proves to be weaker than her desire.

Cover art by Evehly!

Published 2023-09-26 07:00:00 UTC
Last updated 2023-09-26 07:00:00 UTC

A Broken Vow

Author's Note

Fair warning--this is not a feel-good story. But, it does have sex, so if that's your cup of tea, have at thee!

...Didn't intend to rhyme there. Honest.

I hope you enjoy the story! ^w^

A Broken Vow

A small gasp pierced the air.

As a pair of fingers worked their way around Cadence’s labia, the mare had to cover her mouth to prevent herself from making too much noise. Although she and her mistress were alone, the burning shame of infidelity quieted the princess, making her feel as though every little noise she made had to be silenced, lest her husband hear. Her cheeks were tinged red with embarrassment; her body language, utterly ashamed. But a twisted excitement coursed through her; even as the more logical and sane parts of her mind screamed at her to stop, their voices were rendered mute by the fiery, ecstatic pleasure that coursed through her body, whispering its sweet nothings into her as the mare behind her pushed her fingers deeper, and deeper into the Love Princess’ nether lips.

Satin Shade was her name–and my was she ever a mare. Princess Cadence had first met her at a café in Canterlot, and ever since that day, her mind had become utterly transfixed upon her. Routine meetings at the café turned to visits to her apartment, which had quickly blossomed into… escapades, with each other. Cadence could not bring herself to even think the word ‘affair’ to herself, so ashamed was she at the thought; and yet, every time her husband would travel to some far-off corner of Equestria on military duty, Cadence found herself at Satin’s door, wearing a set of fine lingerie underneath her usual attire. Satin, for her part, would always welcome her with that devious smile she always sported, those half-lidded eyes of hers sizing up her prey as the princess was ushered in. And, before too long had passed, the two mares would be all over each other, every article of clothing on Cadence’s body being stripped from her and tossed aside as Satin’s devilish hands began to work her over.

Such had been the case the first time she had visited Satin’s apartment–and such was the case now.

“You’re so sexy…” Satin said in a low, husky tone, planting another kiss on the Love Princess’ neck. “So fucking hot…” the mare’s fingers pressed deeper into Cadence’s pussy, eliciting another small, quieted gasp from the princess.

Electrical tingles of pleasure shot through Cadence’s form, causing her to arch her back further and further as those fingers worked their magic. They swirled around inside of her, dancing a fiery tango as they touched one part of her inner walls, then another, and then another still. “A-Ah…” she moaned, placing a hand over her cunny, gently encouraging Satin to go deeper. “F-Fuuuuck…”

Satin giggled. “Such a naughty little thing,” she crooned, obeying Cadence’s wishes as she pressed her digits that little bit further inside of her. Cadence bit her lip, and then grit her teeth, doing everything in her power to keep from crying out with ecstasy. She squirmed, legs dragging across the sheets as her butt jutted back into Satin, grinding up and down. Satin could only smile, nestling in closer to the alicorn. “Does Shining do nothing for you, honey~? We’ve only just gotten started…”

The words caused a deep blush to form on Cadence’s cheeks–even deeper than the one already present. She did not know why his touch failed to satisfy her as much as Satin’s did… but it did not. She was always left feeling so… wanting, so… unsatisfied. It was like drinking from a well only to leave more parched than when you had arrived. Several times had Cadence thought of broaching the subject to her husband, but…

…But she just didn’t know if she could. Perhaps it was cowardly… but to express her dissatisfaction with his performance in bed would shatter his ego worse than most anything else, in her estimation. The number of times he had confided to her his insecurity in his body, the shame he had felt when he was younger in being smaller than most other stallions in the locker room–how could she possibly confirm his worst fears to him?

Then again… it wasn’t as though what she was doing now was any better. Far worse, actually… breaking her marriage vows, shattering the sanctity and purity of their bond by giving her body to someone else…

…But it felt so good. Satin’s every little ministration felt like a small slice of paradise, taking the princess to a place where she felt nothing short of bliss. The way she would whisper dirty little things in her ear, the way she would slowly, methodically own her… it fulfilled every desire Cadence had. Every dirty, naughty thought she would think to herself when she was hot and bothered in bed. Satin was like an oasis in a scorching desert…

…Even if the water she provided was supposed to be forbidden for Cadence to drink.

“S-Satin…” Cadence whispered her mistress’ name. “F-Fuck…”

“Fuck?” Satin giggled as she kissed Cadence’s neck again. “Be patient, dear… we’ll get to the fucking in due time~”

The indigo unicorn quickened the pace of the movements made by her fingers. If a fiery tango was what they danced before, a rave was their dance now–they began to push in, and pull out with growing speed, feeling every inch of the princess’ insides as they went. Cadence covered her mouth as a sharp moan escaped her, the rose-colored alicorn’s breathing beginning to speed up in tandem with the movements of her mistress. Her legs ground against each other–her body writhing with rapturous glee. “S-Satin!” she cried out again. “I-I’m g-gonna, I’m GONNA–”

Cadence quickly buried her face into one of the pillows on Satin’s bed, and let loose a passionate cry as a forceful orgasm rocked her figure. A small jet of her honeyed nectar shot forth from her pussy, covering her mistress’ fingers in a large amount of the warm, sticky substance. “Mmmh…” Satin hummed, nestling her muzzle into the crook of Cadence’s neck. “That’s it… cum for me, honey…”

Her fingers continued to work for a few moments after the princess’ climax, but in time, their movements slowed, and the dance they had been engaged in subsided. Cadence was breathing heavily at this point, little beads of sweat beginning to slide down her forehead as she continued to moan into the pillow. Fuck was she pent up… she hadn’t had an orgasm like that since… well, the last time she visited. As her thighs ground together, almost begging Satin’s hand to stay where it was, the indigo mare began to kiss… and kiss… and kiss her neck, humming gently as she lavished Cadence with affection.

“T-Thank you…” Cadence eventually squeaked out as she raised her muzzle from the pillow it had been buried within for the last several moments. It always felt so humiliating to thank her mistress… but that was something that only added to the excitement. It was a recognition of the subservience that one part of her mind detested, while another part of it embraced–that binding she had to Satin which gave the unicorn so much control over her. No one else had made her feel this way… and Cadence doubted that anyone else could. It was a relationship of master and servant that, try though the Love Princess did to deny it in normal times, meant that she was completely and totally hers.

Satin giggled. “Thank me later, dear… there is still much fun to be had.” With that, Satin Shade rolled over onto her other side, sat up, and swung her legs over the side of the bed. She rose to her feet, stretching out as she brought the hand that had invaded the princess’ depths to her lips, licking up the honey she had left behind with a satisfied, happy hum.

It took a few moments for Satin’s words to register, but when they had, Cadence could feel herself quiver with excitement. As she rolled onto her back, she looked over to see her mistress standing by the bed, her svelte figure putting on a little show for her as she stretched, swayed, and practically danced as her hips moved from one side to another. Satin’s body was nothing short of immaculate; long, toned legs made their way up to a set of wide hips that were nothing short of enchanting to view. Her waist, meanwhile, was petite, with not an ounce of spare fat to be seen upon it. Her breasts were round and full, and her butt was even more so, its pert, supple cushions capturing Cadence’s gaze every time it came into view. Everything was rounded out by a wonderfully pretty face; a smile that made Cadence’s heart skip a beat, eyes that could convince her to do anything at all, and long, flowing hair that spilled down over everything. She had the body of a goddess.

“Admiring the view~?” Satin giggled, causing Cadence to snap out of her trance. She hadn’t even realized that she had been staring, bringing yet another sheepish blush to the Love Princess’ cheeks.

“Y-Yes…” she admitted with a titter. “It’s hard not to when you put it on display like you do.”

Satin smirked, putting her weight onto one side, and placing a hand to one of her hips. “Well… I can do more than just put it on display for you, honey,” she spoke in that characteristically seductive tone of hers, appraising Cadence’s own form as she spoke. “And you’ve been such a good girl, lately…”

Satin then strode back over to the bed, sitting back down before swinging her legs back over top of it. Giving the pink alicorn a wink, she lay her head down, taking a few moments to get comfortable before taking in a deep breath… and releasing a sensual moan. “I’ve been pent up too, you know… think you could help me out with that~?”

Before Cadence could respond, the princess watched as Satin spread her legs wide open. A set of beautiful pink lips stared back at her, Satin’s clitoris winking out momentarily before disappearing back inside, almost as though it was beckoning Cadence to it. The princess could hardly speak a word as she took in everything there was to see, so awestruck was she by the tantalizing sight before her. “C’mon, dear…” Satin crooned. “Don’t you know it’s rude to keep your mistress waiting~?”

Without missing a moment more, Cadence got on all fours, and made her way over to the inviting unicorn. The aroma of her sex was nothing short of intoxicating, and as Cadence positioned herself between Satin’s legs, she could not help but smile. Even though the burning shame of her infidelity still tugged at her thoughts, its influence over her actions gradually began to fade as she pushed it further and further back into her mind. Right now, Shining didn’t matter. Right now, her marriage might as well have been void. Right now, the only thing she wanted—the only one she wanted—was Satin Shade… and as she looked into the mare’s eyes, she could tell that Satin felt much the same.

Making herself look like a servant, Cadence bent over, jutting her ass into the air as her wings fluttered and ruffled behind her. She brought her face closer and closer to Satin’s pussy, casting glances up towards her mistress’ eyes every so often to gauge her reaction. But, after a few moments of waiting… she finally brought her lips down, and kissed the petals of Satin’s delicate flower.

“Mmmh… there it is…” Satin smiled with a hum, putting a hand to her face as she arched her back. “More, love…”

Cadence obeyed, and planted another kiss on Satin’s cunny. Then another. And then another. Kisses quickly turned to licks, which, before too long, grew ever stronger as the sweet, captivating nectar drowned Cadence’s thoughts in a wave of lust. In mere moments, the once-dignified and proper princess had reduced herself to a sex-crazed whore, pushing her tongue into Satin’s sex with desperate enthusiasm. Her cheeks burned with embarrassed excitement; her wings twitched and fluttered behind her in arousal. Her mistress’ taste was one like none other, an indescribable ambrosia that never failed to leave her wanting only more, and more.

Satin, for her part, began to rub and tease her own breasts as little moans of pleasure escaped her. Her erect nipples made easy targets for her fingers to pinch and push and stimulate, making her body writhe and squirm in much the same way that Cadence’s had earlier. “M-More, love,” Satin commanded, her voice beginning to shake from the ecstasy she was experiencing. “F-Fuck you’re so good… you make me so f-fucking wet…”

By now, Cadence was lost in her tongue’s ministrations. Moaning and humming with no consideration for noise as had been the case before, she explored Satin’s depths with lick after lick, lapping up every little bit of her honey that her tongue could possibly find. She could feel droplets of her own cum begin to stream down her inner thighs, so enamored and aroused was she with what she was doing. Kiss after kiss, lick after lick, Cadence ate her mistress out—all the while being met with moans of approval. Satin’s legs began to twitch, her thighs almost enclosing around Cadence’s head before she managed to spread them apart again. “HFFFFfffffhhh…” she hissed, grabbing the sheets with both hands as a bolt of pleasure shot through her. “Your tongue was made for my pussy…”

Cadence agreed. She wanted nothing more than to continue being this close to her mistress—her love. Shining had never made her feel this way—fuck, he never could. He had never made her feel this absolutely enraptured, this absolutely drunk with lust and desire. Satin fulfilled every desire, every dream she had… she was perfection. And as Cadence shoved her wet muscle deep into her mistress, it was only confirmed to her all the more. This was what she wanted. This was what she craved.

Minutes passed. Satin’s moans turned to cries of joy, calling out her lover’s name into the bedroom. “C-Cadence!!” she called. “A-AAAHHFFFUCK! CADENCE! YES! YES!!”

She was close—Cadence could feel it. Pushing her tongue as far as it could go inside of her mistress, the princess unleashed the most vigorous flurry of ministrations she could muster, screwing her eyes shut as she focused on nothing else but touching every single inch of Satin’s insides.

“C-CADENCE, I—“

There was not even time to warn her.

With a powerful thrust of her hips, Satin orgasmed harder than she had in quite a long time. A veritable jet of her nectar flew out from her insides, and past the princess’ lips—something which Cadence accepted with eager enthusiasm. She hummed with approval as Satin writhed and wrenched herself around, coating her lover’s muzzle with her juices with each spurt that came forth. She moaned, she cried, she growled—there were no combination of noises that she tried that could truly express the level of abject bliss she was experiencing. Her mare—her princess—had done this to her. And she wouldn’t have it any other way.

In time, however, the pleasure subsided. Her movements became less erratic, and her breathing came more under control. Cadence, for her part, slowly began to come to from her drunken, lust-driven ministrations—and when she raised her head, from Satin’s cunny, reality once again began to set in. The fact that this was an affair. The fact that she was breaking her husband’s trust. The fact that she was… naked, even, with someone else.

The burning blush from before began to return. She began to cover herself up, as though she hadn’t just been eating out another mare with reckless abandon. What was wrong with her? What kind of a sick, twisted mare was she? How could she do this so casually… so, often? This was not the first time she had given herself to Satin—and she feared that it wouldn’t be the last time, either. With a shaky inhale, she turned her gaze away in shame.

Then came a set of arms from behind her. “Hey now…” Satin crooned. “Thinking about him again?”

“I…” Cadence opened her mouth to speak, but few words came out. There was so much on her mind—so much to say, so much to express, so much to… convey. And yet, she couldn’t—it was like she was paralyzed, condemned to only be able to think while everything happened around her.

Satin wrapped her arms around Cadence’s waist, and kissed her on the neck. “Honey… he doesn’t matter. He can’t bring you the kind of happiness I can. Just push him out of your thoughts for tonight… let yourself enjoy the moment.”

Cadence tried. She really did. But as she felt Satin’s hand brush across her breast, she could feel nothing but disgust. Moving to cover herself, she felt a tear come to her eye.

What had her life become… the Princess of Love, abandoning that very thing…?