She had been asked by Twilight and Celestia to go visit this strange dimension, given how long she had been in the world of Canterlot High, and give some thoughts on her observations. It was so strange seeing such familiar architecture and humanoids… but at such a smaller stature. Their skin color showed no 'pastel' in the slightest, and her inquiries (or attempted inquiries) into names yielded no results. No version of Twilight Sparkle, no version of Flash Sentry, and so on and so forth.
But what WAS made abundantly apparent, was the effect this reality had on her body. She had heard what happened to Fluttershy, well the version from Equestria, as well as that version of Applejack. Heck she had SEEN what had happened to them. The pegasus had put on considerable curves (to be fair, everyone who had visited seemingly had this… bodily quirk though in Fluttershy's case it was to an absurd degree), and the Earth Pony had seemingly acquired massive swollen udders.
But nothing could prepare her for the actual feeling, the actual experience. Her thighs and hips expanded slightly, but the biggest occurrence was the often talked about 'Extreme Estrus'. The only pony who hadn't been THAT greatly effected by this… heat… was (no surprise) Pinkie Pie. If anything she had become more giddy, and a little more… round.
The dimensional traveler tried to focus on the task at hand, but every movement seemed to send shivers down her spine, and tingles into her crotch. Sunset Shimmer tried to grit her teeth and muscle through it… but could almost feel the literal dripping from her nethers.
"WHY did it have to feel so good?" she whimpered to herself as her legs began to shake and quiver.
Twilight and Celestia wouldn't hear back from Sunset Shimmer for some time after she returned from this 'human dimension'… ———
Another NovelAI-generated pic, set in this new ad-hoc 'series'. This time it's Sunset Shimmer who visits, to try and give her perspective on the strangeness of this 'human dimension' that's drastically different from the one she's lived in for years.