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Part 20 of 21 (Path B)
Friendship is … 20 B
As the deafening roar of ecstasy gradually faded and clarity slowly returned to her mind piece by piece, Luca found herself lying in the grass, breathing heavily. The animalistic trance gave way to a merciless certainty. With an awkward, exhausting effort, she shifted her massive, unfamiliar body and rolled flat onto her back so she could finally witness the full extent of the transformation with her own eyes.
She lifted her head as far as her new, powerful neck muscles allowed and looked down at herself. The sight stole the last of her words. Between her strong, violet-furred hind legs, the completed genitals of a mare was now unmistakably visible — a typical protruding horse pussy, highly sensitive and still coated with clear fluid. Higher up on her soft, rounded belly, now filled with a pulsating inner warmth, rows of swollen horse teats lined themselves along her underside, standing out clearly against the violet fur. Every single detail of her body seemed to loudly proclaim that nothing human remained anymore. She now possessed everything a human should never have, carrying the legacy of a proud, magical beast.
But the true shock struck when she tried to move. Immediately, she missed the familiar, delicate mobility of her former body. When she instinctively tried to raise her arms to touch her face or sit up, the joints locked in place. Her arms were no longer arms, but powerful forelegs. The shoulders were rigidly fused into the barrel-shaped chest, and the heavy violet hooves at the ends made every fine movement impossible. She could only bend and angle her limbs stiffly, exactly as the fixed anatomy of a horse allowed. Every trace of flexibility had vanished, replaced by the uncompromising structure of a running animal.
Lying helplessly on her back, her rigid forelegs slightly bent upward into the air, Luca stared into the sky. The long horn on her forehead cast a sharp shadow across her face, and her long violet-pink tail rested heavily in the grass. She was trapped within a beauty that fascinated her, yet whose physical limitations she now felt more clearly with every breath.

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Background Pony #CBAF
I’m going to add story navigation links in the comments for the transformation sequence, since it didn’t have them originally.
Prev: Here
Next: Here
Background Pony #5C45
@Karltrevor73
Yes, there’s a piece of story attached to this picture as well, check the source at Deviantart. It’s a human guy who’s just finished transforming into Twilight. Too bad most other pictures of that series are behind a paywall. Though this one is one of the best anyway.
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This one has transformation vibes, specifically that human Twilight is still transforming into her much more beautiful mare form and she is shocked to see how her boobies are migrating to their rightful place between her hindlegs as crotchboobies.
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