(Kink information and guide Available in the full description.)
The 'Clean' chapter is the story without the scat scene.
The 'Dirty' chapter is the entire story, with scat scene starting after 4.

A hormone experiment goes astray for Twilight, thankfully she has her 'little' buddy that can assist her in 'testing' her new 'crotch-horn'.

I wrote this story as a commission for BitterSweet on Eka's portal, as their Twin Month Extra Twin story.

Proofreader for this story was Farley on Eka's poral.

The icon was drawn by duud, many thanks to them.

[Quick guide:

Showcasing a new, experimental cock on a female.

After 1st: Shrinking mare to better rub the dick. Musk and cock Ball worship. Ball smothering.

After 2nd: Willing Cock vore, definitely unintentional. Definitely. Cum, ejaculation.

After 3rd: Cum cleaned off small mare by sucking.

After 4th: Scat, Anal vore the shrunken pony, messy. Still consensual.

After 5th: Still twitching. Non-Fatal. ]

I do not own the character: Twilight Sparkle.

Available for writing Commissions.