anal anal_vore anus blush bodily_fluids butt dock_(anatomy) duo face_in_ass female female/female feral feral_on_feral head_first horn inside living_insertion looking_at_another looking_back looking_pleasured lube muffled open_mouth raised_tail rear_view shaking size_difference smile stretched_anus sweat tongue tongue_out vore wings tyto4tme4l my_little_pony princess_celestia_(mlp) twilight_sparkle_(mlp) equid equine horse mammal pony unicorn winged_unicorn hi_res story story_in_description
[b]Most Faithful Toy, Part 1[/b]

[section=Story]
“Ready?”
Twilight Sparkle was staring straight at the sun. Well, at least something that could be compared to the sun. Pretty Pony Princess’ Perfect Plot should be counted as Equestria’s national treasure.
How did I end up here? Twilight thought. Well, if you take Princess Celestia in heat and a curious star pupil ready to do anything for her beloved mentor, then this is what you can end up with. A brilliant mind, such as Celestia’s, filled with lust can come up with the most bizarre (and kinky) ideas.
Shivering from anticipation (and cooling lubricant), Twilight silently nodded. Suddenly, her vision was filled with white and she felt something enveloping her horn and forehead. Startled, she let out some surprised noises, muffled by the white alicorn’s posterior. It always seemed unusually large, but as Twilight has been magically shrunk quite a bit, this pristine rump seemed absolutely massive.
“Oooh…” Princess Celestia moaned as her butthole stretched to accomodate her newest toy in the form of her most faithful student. The pricess stopped pushing once she hit Twilight’s muzzle.
“Huff, huff… I’m at my limit, Twilight. I need to shrink you further.”
The unicorn felt her body getting even smaller. All according to the plan. Aside from the size changing magic, her body has been imbued with various enchantments to protect both her from the lack of air and excessive pressure, as well as Celestia’s sensitive insides from potentially harmful things, like her student’s pointy horn.
“Alright, here we go!” Celestia exclaimed.
[/section]