It was so much more than what she had been imagining, so so much more, description couldn't contain it. Regular sex and masturbation were a shadow, an impotent meagre thing compared to this, this was eye opening on a whole other level, such sheer unadulterated wondrous pleasure. Flashing lights strobed across her vision as blood roared in her mousy ears, her body quivering as her eyelids fluttered.
She was a very very prepared little mouse girl. But nothing had prepared her for this.
And this was just penetration.
She couldn't believe there was more.
She couldn't believe anything was going to stop her from getting more.
Jaw shaking as she came down she managed to look down her body between her breasts to where that signature Fey bulge pushed out her abdomen, stretching her, just as she had read about.
She keened as she felt Fey shift inside of her, the motion of the centaur's trot stirring up her puss, a delicious feeling that made her hips squirm, her knees locking around the thigh thick dick.
Needy for more she scrabbled at the ropes, desperately hauling on them. She jerked back causing her to gasp out as the protrusion marking the horse cock rolled up her belly eating up inch after inch, her smooth skin stretching to fit over the fat dick, reaching past her belly button which went from a round shape to more of an oval as it was stretched around the stallion hood.
"Oh! Oh GODDSS! She's so fucking huuuuge!" whined Octavia as her insides re-arranged to make way for the monstrous horse penetration.
It was only the first little part of Fey's three and a half foot of dick but already Octavia felt fuller than she had ever imagined, they simply didn't make dildos to this scale, this sheer girth.
Her pink little pussy was stretched tight around the exceptionally slippery surface of Fey's length, hungrily slurping at it, trying to draw in more even as her clit was squeeezed even further from its hood, extending down into the air stream that passed beneath the trotting centaur, her fat pulsing clit tickled by the forest air, teasing it to stiffen further.
The mousekin's fluids slopped down the condom sheathed length of Fey, fat juicy rivulets of herself that rolled around the slick rubber surface and fell in a constant pitter patter to the forest floor below, so much that it often formed sloppy gossamer strings of stickiness that fluttered in the wind.
She dragged frantically on the rope, inching herself further and further, her puss eagerly gulping up more fat horse dick, thirsty to be stuffed full with more and more.
"Ahhh… Ahnn… m-moarrr!"
Safe to say all of this blew her fantasies out of the water.
She reached past the foot deep mark and had to pause to just cope with that sensation. Fey was inside of her, INSIDE! And not just a little, Fey was in her deepest depths, pushing up hard against that hidden place in her core, that place that she hadn't realised it was possible to reach until she had read of it and begun experimenting.
Fey was pressing up against the entrance to her womb.
She pulled hard on the rope and the breath was blown from her lungs as that blunt log of a dick crashed up against it, against her cervix, trying to get into a place that no male was able to reach, her most sacred feminine place.
Her fingers curled into claws as she dragged desperately at the rope, trying to pull it toward, her, her cervix deep inside kissing up against the slippery head and then gliding out as it slowly gradually spread wide.
It wasn't even a question, Octavia didn't care that her womb was sacred, off limits, she wanted to be defiled, desecrated, debased.
Her cervix stretched out wider and wider, greedily trying to engulf the head, flowing over every bump. She threw her head back and cried out.
"Violate me FEEEEYYY!"
The massive centaur above her momentarily froze up at that, her body catching for a moment. Then Fey continued her trot, but something was different, this wasn't just a trot, it was a confident stride, a stallion who owned the forest, relaxed as they walked through their dominion.
"You do not make demands of me, my little cock sleeve." growled Fey.
Octavia squeaked. She knew what this was! She had read about it! Fey's dominant side taking command, becoming as overwhelming as her size!
The centaur kicked her back legs up, momentarily lifting her hind entirely of the ground, Octavia letting out a shriek of surprise as six inches of dick was roughly dragged free. Then Fey's rear peaked in height and came slamming back down the earth with the full force of the centaur's weight.
Octava's mouth formed a silent O as Fey thrust back inside of her, the tip brutally crashing up against her cervix, then, because the condom made her length so slippery, her cervix was forced to open up, yawning wide as the ring of muscle slopped around the tip in one sudden rush, engulfing the head.
Fey instantly filled the mouskin's womb and her medial ring slammed home against her labia, her clit roughly crushed up against the heavy ring.
A mousey whine wound its way from Octavia's lips, her body frozen up in sheer shock. Then the explosive stimulation hit her like a bolt of lightning.
"AHNNNhnnNNNNAAIIIEEEEEEEEEEE~!!!!"
Her pussy convulsed around the slippery rubber sheath, her internal muscles going mad as they suckled and slurped on the near-frictionless surface, her legs flailing, ankles bouncing of Fey's barrel asher stiffly out stretched legs swung through the air, toes splayed as her spine arched.