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There you go…! Hm… Well… The shirt’s a little big on you… but I really do think those gym shorts are gonna fit you pretty good… well, at least… for now, anyway… And I think we’ll need to cut out a hole or something there – for your tail…”
 
Monica stepped back, barely suppressing a giggle.
 
“Honestly, you really do look kinda cute…”
 
I snarled at her.
 
“Just kidding! Haha…”
 
It was Friday – and to my absolute revulsion my body had just kept right on… changing – even more – over the past 24 hours.
 
I was shrinking – fast. I used to be 6’2”, but now I was 5’4”… shorter than my little sister Monica – who right now seemed like she was having the time of her goddamn life helping me find some old clothes of hers that could fit me.
 
Mom & Dad wouldn’t be back from D.C. for another week or so… and thank god.
 
“So, one more time… which My Baby Pony character did you say you think I’m turning into?”
 
Monica pulled out her phone and shoved the screen in my face. And there it was – this gayass-looking little fucking horse:
 
Twilight Sparkle.
 
“Heyy! You really are beginning to look just like her – well…” Monica clucked, “except for the hooves, I guess… and the wings…”
 
I couldn’t believe this shit was happening to me…
 
I stood in front of my sister’s full-length mirror to survey the damage…
 
And it was even worse than I had remembered.
 
On top of being short as fuck now, I was also starting to look like a girl – and noooo, not just any girl, noooooo, THAT would be too merciful – but a girl with a huge fucking snout jutting out from her face; a girl with sick, pale purple skin; a girl with these disgusting half-human, half-animal ears growing out of her head, and a fucking horn ramming its way out of her scalp like a corkscrew… a freaky-ass girl with these huge, freakish, inhuman cartoon eyes and a fucking tail growing out of her ass.
 
But a girl nonetheless.
 
I definitely didn’t look like a dude anymore, that’s for sure… even if I did still have my dick… for now, anyway. To my absolute horror, my once-legendary shaft seemed to be shrinking – right along with my ballsack. What had once been maybe 7-8 inches of glorious cock was now maybe like… a pathetic 2 or 3 inches.
 
Like… a fucking chode, or something…
 
Fuuuuuuck…
 
At this rate, in just a matter of days… I’d be totally dickless!
 
The thought – needless to say – was fucking terrifying.
 

 
And, as if all of that shit wasn’t enough…
 
Tugging down my sister’s shirt across my chest, I felt my bare nipples twinge against the stretching fabric. They were itching like hell – swollen, sore, and sensitive. The skin around them felt raw… and engorged.
 
I gasped.
 
I was growing tits.
 
I mean… I definitely still felt them waaaaay more than I could see them – but, looking in the mirror, there was no way to unsee a certain soft little waferlike puffiness gently pressing itself up against the material of the shirt on my upper body.
 
Breast buds.
 
Dropping the hem of my shirt, I shuddered.
 
“Looks like you’re gonna need to borrow one of my old training bras…?”
 
My sister’s attitude really wasn’t helping.
 
Ugh.
 
How much longer was I going to keep… changing… like this?
 
What the fuck was happening to me??
 

 
And was there anything I could do to stop it?

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Background Pony #44F8
(from the source description:)
 
“There you go…! Hm… Well… The shirt’s a little big on you… but I really do think those gym shorts are gonna fit you pretty good… well, at least… for now, anyway… And I think we’ll need to cut out a hole or something there – for your tail…”
 
Monica stepped back, barely suppressing a giggle.
 
“Honestly, you really do look kinda cute…”
 
I snarled at her.
 
“Just kidding! Haha…”
 
It was Friday – and to my absolute revulsion my body had just kept right on… changing – even more – over the past 24 hours.
 
I was shrinking – fast. I used to be 6’2”, but now I was 5’4”… shorter than my little sister Monica – who right now seemed like she was having the time of her goddamn life helping me find some old clothes of hers that could fit me.
 
Mom & Dad wouldn’t be back from D.C. for another week or so… and thank god.
 
“So, one more time… which My Baby Pony character did you say you think I’m turning into?”
 
Monica pulled out her phone and shoved the screen in my face. And there it was – this gayass-looking little fucking horse:
 
Twilight Sparkle.
 
“Heyy! You really are beginning to look just like her – well…” Monica clucked, “except for the hooves, I guess… and the wings…”
 
I couldn’t believe this shit was happening to me…
 
I stood in front of my sister’s full-length mirror to survey the damage…
 
And it was even worse than I had remembered.
 
On top of being short as fuck now, I was also starting to look like a girl – and noooo, not just any girl, noooooo, THAT would be too merciful – but a girl with a huge fucking snout jutting out from her face; a girl with sick, pale purple skin; a girl with these disgusting half-human, half-animal ears growing out of her head, and a fucking horn ramming its way out of her scalp like a corkscrew… a freaky-ass girl with these huge, freakish, inhuman cartoon eyes and a fucking tail growing out of her ass.
 
But a girl nonetheless.
 
I definitely didn’t look like a dude anymore, that’s for sure… even if I did still have my dick… for now, anyway. To my absolute horror, my once-legendary shaft seemed to be shrinking – right along with my ballsack. What had once been maybe 7-8 inches of glorious cock was now maybe like… a pathetic 2 or 3 inches.
 
Like… a fucking chode, or something…
 
Fuuuuuuck…
 
At this rate, in just a matter of days… I’d be totally dickless!
 
The thought – needless to say – was fucking terrifying.
 

 
And, as if all of that shit wasn’t enough…
 
Tugging down my sister’s shirt across my chest, I felt my bare nipples twinge against the stretching fabric. They were itching like hell – swollen, sore, and sensitive. The skin around them felt raw… and engorged.
 
I gasped.
 
I was growing tits.
 
I mean… I definitely still felt them waaaaay more than I could see them – but, looking in the mirror, there was no way to unsee a certain soft little waferlike puffiness gently pressing itself up against the material of the shirt on my upper body.
 
Breast buds.
 
Dropping the hem of my shirt, I shuddered.
 
“Looks like you’re gonna need to borrow one of my old training bras…?”
 
My sister’s attitude really wasn’t helping.
 
Ugh.
 
How much longer was I going to keep… changing… like this?
 
What the fuck was happening to me??
 

 
And was there anything I could do to stop it?
 
—————————————————————————————————————  
This is part of the (semi-abandoned) Skyler Sparkle story: https://www.deviantart.com/horselover-fat-01/gallery/73420147/skyler-sparkle  
I had bigger plans for this story, but now I’m working on a brand new idea that I like ever better, so I’m dumping what I got now.