One of Lady Ursula's more perverse demands was to see to it that each of the stable's ponygirls was individually fitted with a personal vibrator, a smooth plastic rod which a ponygirl might be made to wear at the whim of her mistress. And the Lady found it most amusing for a ponygirl to be equipped with such a device when the girl was being put through her paces in the exercise yard. A crotch belt, attached to the front of a waist-cincher, was buckled tightly between her legs. Like some sort of a chastity belt, it would secure the sex toy in the vagina, assuring the humming intruder could not be expelled, even during the most strenuous workout.

Today, it was Justine's turn to be "properly-equipped." Now the pony-tailed girl stood at attention, slim legs set together, pert breasts uplifted and jutting forward while the straps of the leather harness were tightened in place about her slender body. The groom began the preparations by fitting the body harness, but it was her Ladyship who insisted on personally seeing to the details of the intimate violation that was about to take place.

In preparation for the humiliation she was about to suffer at the hands of her wicked mistress, Justine was led to the thickly padded trestle conveniently kept in the barn for just this purpose. Ordered into position bending down over the padded bar, the obedient girl reached down to clasp the iron staples which served as handholds on the far side of the splayed legs, while obligingly spreading her booted feet. With head inverted and pony-tail dangling down, she closed her eyes, took a deep breath…and waited.

The face of the mistress of discipline was a mask; tight and expressionless, yet her eyes were shining with the fiendish delight she always found in this particular task, as she approached the bending girl. She slowly ran a gloved hand over the jutting curves of that conveniently-placed buttocks, patted the offered rump thoughtfully. A single finger slipped into the crack, causing the cheeks to clench instinctively. The gloved intruder followed the curve to the place where it might blindly feel its way into crotch and the hidden pouch of Justine's lightly-furred vulva. The bending girl eyes flew open; electrified by the first intimate touch of those gloved fingers probing her sex. Then the fingers were stretching her cunt, holding the labia splayed open while the smooth rod was introduced.

For her Ladyship, this was one of those supreme moments: to steadily shove a sturdy vibrator into a girl's vulnerable cunt was pure ecstasy. She swallowed down the knot of lust that rose in her throat. Unable to resist the urge to fuck the girl with the shaft, she pumped her wrist, just a little, till she had the ponygirl bounding up on her toes and wiggling with excitement. As she diddled the girl, Lady Ursula grinned at the fascinated groom who stood on the sidelines watching in silence.

After the rod was worked well in, she gave it a final push that drove Justine up on her toes. The girl jacked straight up, head and shoulders arching back, twisting, yet struggling to maintain the mandated position, as the grinning woman screwed the shaft all the way in. Save for the rounded cap on the end, the entire length had been swallowed up the ponygirl's distended vagina.

A twist of the protruding cap activated the little sex toy, sending a thousand tingles of pleasure electrifying the healthy young body of the tense ponygirl. Justine closed her eyes and swallowed down the surge of pleasure while the vibrator hummed merrily away, tickling her innards with vibrating ripples. Justine wiggled her little ass, unable to keep still.

The Lady ignored her sudden agitation, reaching under for the strap that dangled between the girl's legs -- the strap that hung down from the front of the waist-cincher. Drawing it up into the bending girl's crotch and running it through the slip buckle at the back of the sturdy belt, she was able to cinch it up, tightening it in place. She tugged on the strap, getting a whimper from her bent-over victim. Another even more determined tug had the spirited filly biting down on the hard rubber bit jammed between her teeth, her jaws tightly clenched. Lady Ursula assured herself the straps that bound Justine's body were tight, well-fitting -- and just a little too tight to be comfortable.

Once satisfied with the arrangements, she was pleased to leave Justine with the buzzing device buried up her cunt while the restraining strap cut into the soft flesh of her most intimate parts.

Justine was now subjected to repeated thrills of unbearable pleasure that curled her toes, along with the more deeply satisfying feel of the buttery leather crotch strap cradling her vaginal pouch, drawn tight as it was, pressing into the softly yielding bulge. The intense stimulation had her twitching and shifting uneasily from foot to foot.

Only when she was satisfied that the vibrator had been properly installed, did her Ladyship call for the tail, which the attending groom now brought forth. Normally, Justine submitted to the hateful act with equanimity when it was one of the grooms who inserted the butt end in her anus. But she intensely disliked having her Ladyship do the deed. She knew the sadistic woman took evil delight in inflicting a bit of pain whenever she carried out her preparation "duties."

Lady Ursula rudely grabbed Justine's buttocks, pried her open, and abruptly rammed the greased butt plug home. Justine recoiled at the stab of pain in her rear end. But the cruel mistress of discipline was not satisfied with the connection. While Justine's eyes widened in growing alarm, she continued to push till the dilated anus was truly violated, determined to force the little rear gate to accept the widened end of the plug. A final poke sent the butt plug all the way into the girl's tight bottom! The little ring of muscle snapped shut over the wide end, clenched tightly, leaving nothing but the lanky length of fine hair hanging out her butt.

Justine was a proud girl, and she truly hated this enforced humiliation, but she knew that this indignity too, must be endured. She had once overheard the her mistress talking with Lord Basil about the Lady's peculiar proclivities. He questioned the usefulness of the vibrators; expressed his doubts as to whether they served any useful purpose. But his imperious consort curtly informed him, in that clipped tone of hers, that that was hardly the point. A well-trained girl had to learn that such things must be tolerated. Such discipline had a salutary effect on a ponygirl's character. "It is required," the Lady concluded in crisp words that ended all further discussion.

Such were the indignities inflicted on the young and pretty ponygirl at the whim of her depraved mistress. Of course, Justine submitted to each one, as she had been taught to do; aside from the occasional grunt, or moan, she suffered these humiliations in silence. A ponygirl was permitted to speak only when spoken to.

"It is required!" was the consolation she sought, the touchstone she came back to again and again, a familiar mantra played over and over again inside her head whenever the throb of some devilish device lodged in her body began to intrude into her awareness. It is required! It is required! It is required!

The End