Mary hears her stomach gurgle and feels bulges form on the underside of her womb, Mary recognized them immediately, Mary was growing a two foot long four inch thick horse cock and huge exercise ball sized testicles, all the while her breasts grew to the size of basketballs!
While that was happening, Mary's legs had become four foot long clydesdale legs with huge hooves, Mary was surprised because she hadn't seen herself growing taller.
Mary's body then began to lengthen, her rear legs taking all of her organs with them, her womb and baby going with them turning into a centaur at the same time, Mary's forelegs then grew in and we're just as long as her rear legs, and her skeleton had become made of porous carbon fiber.
Mary then grew an extra heart in her chest triple the size of a human one, her original heart in her horse body tripled in sized.
Mary shuffled on her new huge clydesdale centaur body, as she did so her balls covered in black fur with a tinge of red swung lightly, when an audible sloshing came from them, causing her to become partially erect, she then shuffled more when she saw a virgin mare in heat in a field the sloshing growing louder and causing her to open the gate enter and close it behind her, she guided the noticably virgin mare to the mating stall in the stable, the virgin mare in the stall and locked in, she reared up and rested her forelegs on the log supported by hanging chains, thrust her huge horse cock into the mares vagina, breaking her hymen, and butting against her cervix only halfway down her length, causing her to moan and you were shocked to hear a human moan from her muzzle, Mary smiled and thrusted the rest of her cock into her, entering her womb, pounding her pussy causing her to cum continuously, before she tensed up balls deep and came straight into her womb inflating her to the point of fully formed triplets, the mare neighed OH YES, baby you filled me up so good!
Mary says, Baby you look delicious with that huge cum inflated belly and my centaur foal growing in your belly. Oh, and yes you were ovulating, so you have been impregnated.
Mary pulls out and pour the rest of your load on her back, she tells Mary her name is Scarlett due to her dark red fur coat, and she is pleased to carry her foal.
Mary then needed to pee and did so there in the breeding stall, Scarlett joining in their urine mixing to signify their mating.
They leave the stall and go lay in the field butting their pregnant bellies together, Mary then wrapped her arm around Scarlett's neck, who yelped in embarrassment and pleasure, to discovered she had just grown an equally large cock and pair of balls. Then Mary and Scarlett went back to the breeding stall and Mary enters it while Scarlett mounts her, breaking Mary's hymen and breeding Mary, her balls slapping against hers, causing Mary to cream all over her cock, Mary screams out, YES YES YES beat my balls with your tumescent testicles baby!, before Scarlett cums in Mary's womb, siring Mary's baby to be just as hers as she is Mary's, causing her to bite down on her neck drawing blood and becoming a clydesdale centaur herself, she also grows breasts equal in size to Mary's. Mary and Scarlett hug and kiss, while Mary gropes Scarlett's breasts, right then Scarlett's womb suddenly lurched outward painfully and the child inside her was infinitely more substantial and matured in development than before.
The two go and lay in the field and rest there cuddling as the sun sets, soon the two begin to hunger and take the two stallions approaching them and immediately vore them, swallowing them completely, with their worth now nothing more than as food the two herm centaurs listen to the sounds of digesting prey, the two ejaculating gallons of horse cum into their acids and as they melt their bellies begin two swell.
The acids revived the stallions a hundred times the two ejaculating gallons every time before with the final liquification the stallions bones were melted as well and they were dead with their liquification being permanent.
With a hundred stallions worth of digested liquified prey in their bellies from just two stallions the herm centaurs fed on, the two fall asleep their guts process the digested liquified sludge into usable nutrients for Mary Scarlett and the babies all night long, putting extra flesh in their breasts and accelerating the babies gestation by seven months, causing them to be born in five months instead of eleven.
To be continued......