Mouth open, eyes gawking, Kelly stood stunned to have seen her father change yet boyfriend to a Shire stallion.
Trying her best to back away and run for help, Kelly was almost to the stable door when, what might her father turned to give her a snide look.
"Dare ask, where would you think to go, who could you tell? No my young one, what you have seen does for you what it meant for Mitchell.. See him, he is daydreaming his coming conquests, those big balls does his thinking now. Yet in as much I might appreciate another mare, I give you the offering, be you a horse, pony, donkey, of maybe a cow?" said what was her father, once.
Kelly stood there her eyes wandering from one animal to another the thought of having to become as one not pleasing her at all.
A rank whinny from down the end of the stable had her and the one who was her father loo to a far stall.
"Roger, yes I think he said it quite well!" Pointing his finger at Kelly he stated profoundly, "Roger is alone, he longs for a friend and partner. Pour boy he was casterated by your daddy last year, and would find you as good companionship. Kelly, be you now a stout and hardy Exmoor pony, but to delight Roger you shall become a full fledged stallion!"
Kelly turned to run but tripped, falling she caught herself on two new forelegs and a set of solid pony hoofs.
Her clothing slipt and tore from her rapidly changing and growing body.
A short squealing scream as her head elongated, teeth fell out and new equine formed teeth sprang into place.
Her spine lengthened but did this without any pain. Her real agony came as vagina and female organ withered, turning then to a male her balls popped out a deep stifled groin, as a sheath protruded.
A shaking shiver shuddered down the length of her changing body. It in as much making the changes happen in proper time.
Turning to face what was her father, she stood blinking her big eyes, feeling her first real sensation of being a pony. To this her response was as would be proper for any young stallion, she became erect.
As much in thought of what she was feeling her pony Exmoor sized cock raised up to bounce off her rounded big belly. the very touch of her hairy belly sent pangs of sensual desire up the cock, to her ball, and wnaderen to a brain now degraging minute by minute.
"Your having the first round of true male pony masturbation, do enjoy it daughter! Learn to love it as you will have it happen several times each and every day. Kelly is still a good name for a pony, it does not distinguish between male or female, so we let you keep it as a stallion Exmoor, and soon to be at stud!" chidded her one time father now owner.
Kelly would not deny the feelings she was finding a new thrill. Her cock being twenty inches long, stood up and out like those on bigger horses.
Hind legs stretched to their lengthened limits, as forelegs stood stretched out as well, she wagged her cock, masturbating in true stallion fashion. Her eyes not moving and her mind captured by what she could not se, and only remembered from being around horses and stables.
A quick pelvic jolt sent spurt after jetting stream of white thin cum, and mixed into it was what reminded her of Tapioca pearls, now being her real semen, that of a stallion pony.