themariogamer

Unwanted Pony Girl Experience

Published: March 17th 2025, 7:14:05 pm

Hey there dudes and dudettes!

First off I am really sorry for the lack of updates the last 2 weeks. I won't mince words, work was a bitch.
A few Coworkers got pregnant, and one of the labs has faulty equipment, so now our lab is not only understaffed, but we also have to take over some extra work. Fun
Alongside that I had shifts every weekend alongside regular week-work for the whole month...

But now I am back again with a new captain. This time a Patreon Request by "Fionna" who wanted to see a guy getting turned into a ponygirl by his step-sister and put up for auction!

This one was a new experience and hard to write. Ponygirl deviates quite a bit from the usual feminization stuff I do.
I just hope that they are happy with the result anyway. If not I am terribly sorry.

And with that, I take my leave again, and until next time, stay happy and healthy!

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„Aww, what the matter, little sis, cat got your tongue?“ Viviann giggled as she heard her step-brother's muffled protest as she led him down the hallway.
„Or maybe you are just so excited for the day! Is that it? Are you so excited you can‘t speak?“ she continued her teasing, only causing Michael to glare at her.
The male in question would have loved to retort to his step-sister's teasing, but the harness in his mouth that was locked to his head made it quite tricky.
Instead, he dug his feet into the ground and threw his head back, trying to defy his sister.
But the massive heels he was wearing, along with the new weight on his chest, made it near impossible for him to keep his balance, and with a small tug from the leash, he was forced forward.
„Bad girl!“ Viviann admonished, frowning at her brother‘s little rebellion. „Seems like you still need some training. But I think your new handler will take good care of that!“

Michael‘s feminized torture began just days before when he once again got into a fight with his step-sister Viviann, something that happens quite often.
The step-siblings never got along well. Both did not want their parents to pay too much attention to the other, and they were also competitive to the core.
This ranged from grades to sports to popularity, as no matter how insignificant the subject, they managed to make a competition out of it.
This, of course, meant that insults and other harsh statements were often traded between the step-siblings, though this time Viviann reacted quite differently.

„Hey Viv“ Michael shouted from the couch as he saw his step-sister enter, still wearing her riding outfit. „Did you have a nice day playing with your horsies?“
„Shut up, ass“ Viviann responded, not wanting to deal with her step-brother after having enjoyed a nice long ride with her friends.
„What did crawl up your ass, sis?“ Michael teased with a smirk. „Did you, by any chance, get a nice hard ride instead of being taught how to ride yourself?“
„What was that?!“ Vivianne shouted, glaring at her brother, whose smirk only widened in response. „Just asking if maybe a slut like you had some fun with the farmhands, that is all!“
„YOU FUCKING DIPSHIT!“ Vivianne screeched, throwing a pillow at Michael who only laughed before running into his room, leaving his fuming sister behind.
„That fucking asshole! Not even two minutes and he already ruined my mood!“ she spat as she angrily stormed upstairs to her room, her brother‘s words lingering on her mind alongside plans for revenge.
„So Michael thinks he can just call me a slut without consequences? Well, not on my watch“ Vivianne said to herself, a smirk growing on her face as she thought of the perfect plan as she took out her phone. „Hey Aunt May, can you do me a favor?“

Michael of course did not know or suspect anything about his sister's plans, and days passed without anything happening until Friday evening.
After dinner, Michael felt dead-tired and immediately went to bed, and Vivianne could only smile as the sleeping pills she sneaked into his food worked their magic.
And so she waited a few hours, wanting to make sure her brother was out like a light before she entered his room with a big box in her hand.
„Time to play with my horsie as you so eloquently put it, Michelle“ Vivianne whispered with an evil grin, undressing her brother before grabbing some hair remover.
She slathered the cream all over his body, watching in glee as his hair slowly began to vanish in a matter of minutes, leaving him completely hairless from head to toe.
Next Viviann grabbed a pair of sizeable breast- and hipfoms that she slathered in glue before attaching them to her step-brother, the seams nearly invisible.
This was then followed by a corset that she slathered in glue before wrapping it around Michael‘s waist and pulling it as tight as possible, making him groan and wheeze in his sleep.
"Aww, you are shaping up to be the best horsie around“ Viviann cooed with a smirk as she observed her brother‘s newly created hourglass figure. „Now we just need to get you into some fitting clothes.“
And so she started by pulling a pair of sheer black panties with a heart-shaped hole at the back up his legs, followed by some fishnet stockings. Next came a black bodice that she put onto her brother, the clothes proudly putting his large cleavage on display while his legs and thighs were left completely exposed.
The last part of the outfit was a pair of white 7-inch hoof boots into which Viviann dumped as much glue as possible before forcing them onto Michael‘s feet.

“Oh, you look just perfect“ Viviann laughed at her transformed brother before grabbing a myriad of make-up from the box. „We just need a few finishing touches to make you perfect!“
And so started the last part of Michaell‘s transformation, beginning with tons of foundation and blush that ended up giving him a doll-like complexion.
Next was a black wig that Vivianne filled with some glue before dumping it onto his bald head, the new hair being long enough to reach his lower shoulders.
After that Michael's sister continued with his lips, injecting them with filler and adding lip plumper to make them big and soft before painting them a dark pink.
Lastly came the eyes, for which Viviann glued on some fake eyelashes that she covered in mascara before she added some eyeshadow and eyeliner, after which she finished his eyes by drawing on thin arches for eyebrows.

“And voila” she said, stepping back to admire her creation. “Now you are the perfect ponygirl. Just a few more accessories to complete your new look, Michelle.”
With that Viviann grabbed a harness from the box that she fasted around her brother‘s head, making sure the mouthpiece was in place before adding a leash. Lastly, she grabbed a thick tail-plug that she slathered with the remaining glue before thrusting it up his backdoor, making Michael moan in his sleep.
“Oh, you love that, don‘t you, you little slut?“ Vivianne giggled when she heard her brother‘s moans from the plug. „Don‘t worry, there is more where that came from!“ And with that Viviann was finished with the feminization and ready to enact the last part of her revenge.

When Michael woke up a few hours later, the first thing he noticed was the splitting headache he had, alongside how weirdly sore his jaw and ass felt.
The next thing he realized once he groggily opened his eyes was that there was way too much sunshine and noise, feeling more like he was camping outside instead of sleeping in hi bed.
“Whmm Ipphhh…” he started to say, but quickly noticed that he was unable to form any words, and that something hard was pushing into his mouth.
“WHAFF?!” he shouted, eyes flying wide open in panic as he stood up, or at least tried to as he quickly found out that his hands were bound together and his feet were put in a painfully high arch.
At that moment Michale also recognized that he was not inside his bed, or even inside his room, instead he was in some sort of cage and could see a ranch nearby.
Before he could think more about his situation though he heard footsteps, and with wide eyes he saw his step-sister and an unknown woman approach.

“So, this is your friend?” the tall woman clad in black said, inspecting Michael from head to toe, the feminized boy unable to do anything as he was frozen in shock.
“Yep, that is her Aunt May!” Viviann cheerfully said. “My friend Michelle here always wanted to be a ponygirl, and I thought that this would be the perfect opportunity for her.”
“Well, it a good place to start” the woman named May remarked. “And I am glad that you brought her here, my friends for sure will love a fresh new girl at the auction.”
“ACHPION?!” Michael shouted in shock, his voice muffled through the reigns inside his mouth as he began to trash around in his cage while cursing behind the gag.
“Well, looks like Michelle here loves some disobedience play” May remarked in mirth, looking at Michael's struggles before she turned around with Viviann following suit.
“Luckily for her my friends love to be rough!” was the last thing Michael heard as both May and his step-sister walked back to the ranch, and the last thing he saw was Viviann turning her head to smirk at him and mouthing “Who is the slut now”.