Vicky led you over to a quiet corner of the yard where a number of strange contraptions were positioned side-by-side. There appeared to be two different designs, both of which resembled horses in different positions. Some looked as if they were simply standing on all-fours, while the rest appeared to be rearing-up on just their back two legs.
You also spotted that one of the machines was currently in use. The four-legged contraption had a large grey horse on its back, who seemed to be moving with the machine. It soon became clear what this strange device was for once you spotted that the horse was male, and that he had his cock buried half-way inside the contraption beneath him.
The stallion snorted as he pounded into the imitation mare beneath him, making the device rock in time with his powerful thrusts. He was clearly eager as he jabbed his member in and out rapidly, making his enormous testicles slap loudly against the strange contraption.
“Looks like you’ve got a lively one on your hands!” Vicky called out as she led you past the rows of machines.
“Oh hello Vicky,” came the reply as a young female attendant appeared from behind the excited stallion, “didn’t see you there.” She then turned to the stallion as he continued to thrust away. “Come on big boy, slow it down. We don’t want you to hurt the poor girl!” The stallion snorted in frustration but did eventually transition into more of a slow but steady pace.
“That’s more like it,” Vicky continued, “we don’t want to make Princess here nervous. She’s a good filly at heart but she is feeling somewhat anxious about meeting her first proper mate.”
“Ah, a boy was she?” the attendant asked, already seeming to know the answer. Vicky smiled and nodded in reply. Meanwhile you neighed pathetically, still thinking that you sounded threatening. “Well she looks gorgeous, imagine how adorable her foals will be.”
You whinnied again as the two women laughed at you. It was disturbing that they were so casually uncaring about the fact that you were human until a few days ago. They had clearly been doing this for so long that they had become completely desensitised to the suffering they were inflicting. To them you were just another dumb animal; needed to work, to breed and to serve the Stables.
The two attendants continued gossiping until the stallion using the contraption began snorting and whinnying loudly. You and the two women watched as the big male seemed to be nearing a powerful orgasm. He quickly lost control as he returned to his old method of rapidly pumping in and out with his hips. The young attendant tried to correct his technique, but in his confused and lust-addled state the stallion pulled out a bit too far, causing his cock to slip free of the device all together. She tried to re-insert it but it was too late.
The young woman jumped back as the giant cock in her hand began to erupt. The stallion’s immense load started to shoot on to the floor as his penis jerked beneath him. Soon a small puddle had formed beneath the contraption as numerous ropes of ejaculate fired on to the floor.
As this was happening you were horrified by your reaction. You found you couldn’t take your eyes off the horse’s flaring member as his hot sticky semen blew out of it. Seeing this young stud in all his glory made you feel giddy inside. You felt the heat bubbling inside you as your body’s feminine instincts asserted themselves. You could feel your tail going up but simply lacked the willpower to stop it. Soon you felt the familiar sensation of your vulva opening and closing as your arousal caused you to flash your clitoris to the world.
“Oh my,” Vicky said as she watched the stallion’s load seeping over the floor, “it looks like you have some cleaning to do.” The other attendant sighed with her hands on her hips as she watched the cum continuing to dribble out of the horse’s softening cock. Vicky then looked at you and could immediately tell that you had been turned on by this display. “Well at least Princess here was impressed. I guess I had better get her out of here quickly, I think she’s going to orgasm just from being near your well-endowed pupil!”
With that Vicky led you away from the spent stallion as her colleague dashed off to go and clean up the mess he had made. She led you towards one of the two-legged contraptions before she started to hook you up to it. You were half-aware of what was going on as your mind imagined what all of that cum would have felt like filling up your fertile womb.
You stood stunned as Vicky secured your legs to four iron rings that were bolted to the floor, ensuring that you were locked firmly in place. You felt that your hind legs were spread slightly wider than the front pair, while your tail was being held off to the side. Had you been paying attention, you would have recognised this position from yesterday’s lesson on ‘attracting a stallion.’
As it happened though, you were taken completely by surprise when you felt something hard and smooth pressing against the entrance to your vagina. You craned your neck around to see that the device was fitted with a black rubbery cock, which looked identical to the one that Vicky had used on you yesterday.
The tip entered your slick folds with a *pop* before inch after inch of rubber started to sink inside your eager passage. Your juices squelched out of your winking vagina as the thick cock spread your lips tightly around it. When the fake penis finally stopped advancing you were left feeling stuffed and stretched as you shook in barely-restrained desire.
With the device in place, Vicky strolled around to your front. “Now then Princess, this machine is able to imitate the size, weight and feel of a rutting stallion. It is designed to get inexperienced fillies used to the concept of being mounted and bred, without any risk of them injuring either their mate or themselves. Former-boys in particular seem to be especially accident-prone, though so far it looks like you have taken to it like a duck to water.”
The reminder that you were a ‘former-boy’ made you stir somewhat from your lustful haze, though it wasn’t nearly enough to overcome your body’s primal urges.
“Now then,” Vicky continued, “first we need to get your body used to having a stallion’s immense weight on your back. At the moment the device is on the lightest setting, but we are going to gradually increase the load as the lesson goes on. Meanwhile I want you to maintain your current posture. This will be important for avoiding injury when you mate naturally. Now then, let’s begin.”
With that Vicky started increasing the weight that was attached to the device. You hardly noticed the first few levels as your sturdy equine body took the weight as it was designed to. As this was going on you remained focused on the rubbery cock that sat lodged inside you. You became frustrated as the sexual tension within you continued to build. You needed to be fucked so badly and to feel that sweet release of orgasm washing over you.
With this in mind you started gently rocking your hips, causing the penis to rub against your sensitive inner walls. You let slip a soft moan of satisfaction as you finally felt that wonderful friction teasing deep inside your passage.
You continued to do this for a few moments until Vicky snapped at you: “Naughty girl! What did I tell you about maintaining your posture!?” You instantly bolted back upright, not wanting to anger your sadistic teacher. “Consider this your warning. Do that again and you will be in trouble.”
Vicky’s threat made the lust that you had built up instantly dissipate. What had you been thinking? Why had you disobeyed this psychopath? Why had you risked damnation to satisfy your carnal desires?
You sat there mentally scolding yourself as Vicky continued to add weight to the device above you. The added mass was starting to get uncomfortable for you but you did your best to hold your position. The difficulty was raised a couple more levels before Vicky seemed satisfied.
Vicky walked around you, seemingly examining your posture as she stroked her chin thoughtfully. “Hmmm… not quite maximum weight but I don’t want to inflict any injuries upon you. You will get used to greater weights once your body finishes developing into that of a true broodmare. Now then, let’s move on to the mating proper…”
With that Vicky pressed a button and the machine slowly started to move forwards and backwards. You shifted in discomfort as the heavy weight moved awkwardly above you. This coincided with the return of a familiar heat in your pussy as the rubbery penis started to stretch and rub your most sensitive areas.
The speed of the contraption soon moved up a notch as Vicky slowly eased you into the pretend mating. You tried to fight the pleasure building inside you as you snorted and pulled against the restraints. However, you now found that the heavy weight on your back made it difficult to move, leaving only your head and neck free to look around in alarm.
Sensing your continued defiance, Vicky turned the machine’s tempo up again before she moved to your front. You tried to look away from her but she forcefully grabbed your mane and made you look at her. “Oh Princess, why do you still torture yourself like this? If you just gave in to your desires it would make your life so much more enjoyable. Your old human life is gone. Now you are a beautiful filly and being beneath a stallion is where you belong.”
You snapped at Vicky in an effort to bite her, but sadly she was able to quickly dodge out of the way. You snorted in anger and tugged against the restraints as she stepped back to a safe distance, her usual sadistic smile still adorning her face. “Come on Princess is that any way to treat your owner? Your pathetic defiance just makes watching you squirm all the more fun. Now I'm just going to sit back and enjoy watching you slowly break and give in to your desires like you always do. We both know that you are just a horny filly in heat and that this is what you really want.”
You continued to glare at Vicky as the machine kept rhythmically rocking back and forth. Despite this, you found that thinking about how much you hated the vile woman allowed you to take your mind off the sensations radiating from your pussy.
After a few minutes of maintaining your composure, Vicky walked to the side of the machine and turned the tempo up another couple of levels. What had been a slow but steady series of thrusts quickly shifted into a more purposeful rutting motion. You grimaced as the rubbery cock started to hammer into you harder and faster. You could feel the increasingly intense stimulation from your pussy sending electric jolts shooting down your spine. You knew your body was getting aroused as your equine sex winked open and sent juices spilling down your legs. Despite this you fought hard to remain mentally strong. You told yourself over and over that you were a man, not some dumb animal.
Despite your recently-found fortitude, after a few more minutes of sexual stimulation you were starting to feel your resolve wavering. You had started to let slip soft moans of delight whenever the cock rubbed you in just the right spot. You could feel your expression softening as images of stallions started to encroach upon your mind. You groaned from the exertion as your body trembled in need. You had put up a good fight, but you knew you couldn’t hold on for much longer.
Upon seeing that you were struggling, Vicky walked back to the machine with a broad smile on her face. “See Princess, what did I tell you? Even with all that effort you can barely contain your dirty desires. You wish this was a real stallion fucking you right now don’t you? Well, why don’t I give you a taste of what that would really feel like!”
With that Vicky turned the machine up to its highest setting. The contraption suddenly went from a purposeful thrusting to a wild fucking motion as it moved as if it were a stallion lost in the throws of passion. You whinnied in surprise as the rubbery cock started to hammer into you much harder and faster than it had previously.
You knew you wouldn’t be able to withstand this assault for long as the sensations of your pussy being filled and stretched became too intense to contain. You shut your eyes, hoping to block the feelings out, only to find that your thoughts soon started to become corrupted by the lust that was surging through your body.
You thought back to Harry on the day of your transformation. Images of mares with stallion cocks thrusting in and out of them circled your mind as you matched those images to what you were feeling between your legs. You started to imagine that the dick inside you was real, and that soon you would be filled with a torrent of delicious stallion cum.
You began to whinny loudly as any traces of restraint gradually began to evaporate. Wet sloppy squelches now echoed out from the depths of your passage as the machine compressed your juices deep inside you. You knew an orgasm was close as your pussy began to quiver and the heat in your loins started to bubble to the surface. You braced yourself for an amazing climax as, in your mind, the imaginary stallion shoved his flared dick deep inside you.
You were just about to reach the summit of your pleasure when you felt a hand grip the underside of your head. Your eyes opened to see Vicky forcing you to look her in the eyes. In that moment your eyes widened slightly in horror as you realised what you had allowed to happen. You grimaced as you tried desperately to contain your building orgasm. However, you knew it was already too late as you felt your vagina beginning to convulse in pleasure. You whinnied in ecstasy as you finally conceded defeat, letting the sensations wash over you as you came hard around the stiff, rubbery length.
You cried out again and again as you squirted warm juices over the cock as it continued to pound in and out of you. A steady stream of the pungent fluids were soon oozing out of your stretched folds as your body released its prize.
You remained basking in the wild passion of the moment as the pent-up need finally dissipated. You hardly even noticed as Vicky released your head and deactivated the machine. You also failed to notice as she detached the black rubbery penis and brought it to your front. You had your eyes shut and your mouth hanging slightly open as you panted from the intense lovemaking, meaning that you were caught off guard when the horse cock was roughly forced into your mouth.
You coughed and spluttered as Vicky started to work the toy in and out of your mouth. You tasted your pussy juices once again as the attendant forced the tip to the back of your throat. You gagged loudly as you did your best to suck and swallow around the large rubbery organ. You looked up pleadingly, only to see that Vicky’s smile had more of a sadistic look about it than normal.
Vicky continued to thrust the toy in and out until she was satisfied that it had been thoroughly cleaned. She then mercifully withdrew it, leaving you gasping for breath and now leaking fluids from both ends.
“Well, well, well,” Vicky said as she walked back to your front, “that was quite the performance. I hope you have learned that there is no point in resisting the inevitable. You are a horse now, and you will always be enslaved to your body’s urges.”
You gave a weak snort of protest, though you were too tired and overwhelmed to really give it any real weight. Vicky said nothing in response, her cruel smile telling you everything you needed to know. Instead she simply unhooked you from the contraption before leading you away. You went along with her for now, not wanting to give Vicky any more opportunities to torture you further.
Before you knew what was happening you were stood back in your stall munching down a mouthful of hay. Your senses had somewhat returned, but you were still reeling from the ordeal of your training. You started to wonder whether it really was hopeless. Was there even any point in resisting if there was no hope of escape anyway? Maybe it would just be easier to forget all of your human worries and begin a more fulfilling life as a simple horse.
‘No! You had to keep fighting!’ This thought kept swimming through your mind, but you knew you were starting to doubt whether it was all worth it.
Eventually you decided that it would be best to settle down to sleep. You curled up on the floor of the stall, desperately hoping that you wouldn’t have any more nightmares. Sadly, this wasn’t to be the case…