“Ahaha, D-Darling, if you p-please don’t mind...” Radiance stuttered out, her gaze flickering between the crazed look on the Mane-iac’s face and the huge dark purple cock that hung out of a torn section of her suit.

“Bwahaha! I do mind very much, Power Pony!” The Mane-iac laughed and retorted at the other mare, a few green tendrils of her mane slithering up from the ground towards the crotch of her captive’s own suit, with some other tendrils already wrapped around her and holding her in place. “You’ve caused me a lot of trouble, destroying my machines and tossing around my henchponies...” Pushing herself forward a bit towards Radiance, the villain reached one of her forehooves out towards Radiance’s face, who understandably flinched away from the contact.

However, the hero wouldn’t get any respite from the other mare and her titular mane, as the Mane-iac suddenly slapped both forehooves onto the unicorn’s cheeks, forcing her to stare directly at the deranged pony’s strange and captivating red and green eyes. “Now I will show you...” She spoke almost quietly for a moment, leaning her face close enough to the other mare’s they almost touched snouts, and rubbed the marshmallow-coloured mare’s cheeks with her smooth, latex-covered hooves, “...Just how enjoyable being my subordinate truly is.”

Shrrrip!

Radiance gasped aloud as she heard the sudden noise, and took only a moment before realizing just how drafty it had gotten on her crotch, the cool breeze of Maretropolis’s nighttime whooshing past her now exposed damp pussy and swollen teats. “W-wait, no!” She exclaimed, trying to hold onto her dignity as she stared into her opponent’s powerful and hungry gaze, “I-I am a lady, a-and you will not--!”

The supposedly incorruptible hero’s voice was cut off as she felt a thick tendril of green mane sliiiide along her engorged snatch, making her freeze as a hearty blush bloomed on her otherwise pristinely-coloured face.

“Bwahahaha...” The Mane-iac giggled, pulling her face a bit away from her captive, “You never had a choice, Radiance, and now you will be my mane sex toy!”

And with that remark, and a laugh at her own pun, the Mane-iac shoved her cock into Radiance’s pussy with surprising accuracy and speed, throttling the mare in question and forcing all the air from her lungs as that thick purple cock got stuffed deep into her tight breeding hole. It was only for a moment that the fully-female pony could feel herself get completed with that shaft filling up that gaping hole of hers, as that villain decided to yank it out right after!

Deftly swivelling the little pony around with her dexterous mane so her hips would clap against the hero’s plot, the Mane-iac then swiftly rammed her cock back into Radiance, making her gasp again as she felt so full and warm with that fuck-stick inside of her, but again it was only for a moment before it flew back out.

Thankfully, though, the Mane-iac was comfortable with her position partially behind the other pony’s back and looking into her shocked and overwhelmed face, as she immediately thrusted her cock back inside of her, and then back out once more. Quickly, she came into a rhythm of cock-thrusting and retreating, leaving Radiance stuffed like a Gryphon’s Thanksgiving turkey when it went in, and gasping and gaping like there was something utterly missing from her body when it came back out.

Gasps and groans weren’t quite the reaction the Mane-iac wanted, so she laughed her infamous ‘Bwahaha!’ when she felt Radiance getting a tad more used to the pillar of meat pitoning in and out of her body, and started moaning out loud in the middle of Maretropolis like a slut getting railed, because she was a slut getting railed, after all! Being in the middle of Maretropolis did leave the possibility that they were being watched by dozens, if not hundreds of ponies that would otherwise being going about their day, and even possibly some other of the Power Ponies, too stunned by their compatriot’s lustful moaning and wriggling in their mane villain’s, well, mane, to do anything to stop any of it, but said villain hardly cared about that at the moment, as the tight, warm, and wet sensations slrping at her huge dick were quite taking her senses all on their own!

However, the Mane-iac could feel more than just her shaft, as the hefty, weighty, and almost swollen balls below swung wildly with each of their owner’s thrusts, slapping around chaotically as they were far too slow to keep up with the villain’s quickening thrusts. Of course, the Mane-iac’s mane was only feeling some things as well, such as the rough and course ground below that was everywhere and was very irritating, but there was also the pleasant squeezing around Radiance’s latex-clad tummy, and the feeling of holding back the unicorn’s frantically wriggling legs--both fore and hind, and even sensations of slithering across the smaller mare’s swollen crotch-tits, tracing around their plump size and tickling the sensitive little nipples atop them.

Radiance, the incredible slut she had now shown herself to be, moaned even louder as she felt her teats get mane-handled, some intermittent swearing mixed in where she lewdly proclaimed her ravenous desire for the villain to breed her. Of course, the Mane-iac had no qualms about obliging, and kept ramming her cock into her captive’s pussy again and again, wet squelches and plapps sounding out into open air, and with her potent musk that usually remained trapped in her fur-tight suit wafting out as well, it would be clear to any would-be watchers just how heavily she was claiming Radiance.

As the claiming continued, it didn’t take too long for the Mane-iac’s grin to get even more mane-iacal, grunting and laughing lightly behind her clenched teeth as she pounded away at her so-called opponent, feeling a tension build in her crotch that seemed to sting at her balls, which were already bruised a bit from how much they kept slapping against plush pony plot. “Bwahahaha!” She mane-iacally laughed into said pony’s ear, speeding up her thrusts and many lewd noises they caused, “Are you enjoying succumbing to your new leader, Power Pony?”

Radiance could hardly respond to that question, and may have not even registered it, as she just kept moaning, unable to voice anything but the absolute bliss she must’ve been in, and so the Mane-iac took that as an agreement.

“Well, this is just the beginning!” She called out in response, and moaned through a bitten lip as she continued to rail the enraptured mare, before practically shouting in her ear, “Now, get ready for the final show before you join me for good!” Her groans and grunts became more feral and passionate as she continued, shoving her cock harder and harder into Radiance’s engorged pussy, making her own moans louder and more feverish by the second, and all of it led by the Mane-iac’s hefty, swollen nuts, both stinging with impacts and tense with pent-up seed.

And finally, gripping the slutty unicorn tighter than ever with her mane, the Mane-iac slammed her cock inside her a few final times, and came. A thick deluge of semen immediately shot through her length as she remained hilted into that puffy pony pussy, splattering into what was presumably her womb with how deep her dick had gotten, quickly filling it with multiple fat ropes of gooey spunk and inflating it like a balloon. It only took a short while before that expanding reservoir became large enough to distend Radiance’s belly itself, with most of it bulging out from the lower area under the tight green mane-ropes around her upper section.

So much cum splurted out of the Mane-iac’s cock and into her new recruit’s belly that there soon became no question about how non-svelte the pretty mare was, as the spunk sloshed around in that balloon as yet more shot inside, but thankfully, it all stopped before the balloon came anywhere near bursting.

“Oooohohoho!” The Mane-iac moaned into a laugh, and huffed out some heady, exhausted breaths before leaning closer to her sex toy’s ear and said to her, “I hope you enjoyed that introduction, as there will be far more of that to cum…” Grinning like, well, a mane-iac, she added, “In fact, let me show you right now!”

“O-oh, g-goodness...” Radiance muttered weakly as she realized, with what little proper awareness she had left, that the villain was going to keep fucking her until there was nothing left but subservience, and while the capital-L ‘Lady’ part of her wanted absolutely none of that, the rest of her though it was pretty fucking hot.

Author's Note

Image source is 2691664 on Derpibooru (plus some related images by the same artist).