Plugged and belted

Mackenzie snorted softly and instinctively tried to pull away, but, once again, she found it hard to do so. The boots were heavy and her bindings tight, and the stall was too small for her to be moving freely. So she stumbled and took a couple of steps to the side, until she felt her head harness pull away. She was firmly tethered.

The head groom took the reins and pulled back, and Mackenzie found that the bit had more than one role, beyond keeping her quiet: when pulled, any attempt to resist would result in a painful tug at her tongue. It was diabolically simple and efficient, and she trotted back with small steps toward her minder. "Easy, girl." said the woman as she patted her rump. "Firm legs and a solid, round rump. Very nice. You'll do well here." Mackenzie took pride in her shapely body but to be appraised like this, like an animal, wasn't something she could take in easily. "I know it a lot to take in, but in a couple of days you'll be just like the other fillies." She felt the tether tighten.

"Now, let's finish here so we can all get some fresh air and get you to training." Mackenzie trembled in fear. The simple, casual tone of the woman suggested that this was very normal, and, that in fact, this was just an introduction. What craziness expected her over the next seven days? She helplessly stood still, until something pushed against her anus, making her buck. The bridle did its job forcing her to stand in place while her sphincter was opened once more, making her relive humiliation and arousal, still fresh from when the nurse fingered her less than an hour earlier.

But this time she got stretched considerably more than before. It was only because the object was well lubricated, and because she was relaxed from her earlier climax, that she experienced only a soft pang of pain as her sphincter opened and then closed in a tight grip around the intruder. The object stretched her anus widely and, while relatively short, it made her feel a little full. And much to her confusion, she enjoyed that very much.

Then she felt something pushing inside her without stretching her anus any further. "We use hollow plugs. They do everything a butt plug does, and also make inserting things really easy" the head groom explained to the guard while she slid Mackenzie's tail plug through the tunnel hole. Mackenzie moaned as the new intruder penetrated much deeper, and, accompanied by soft hissing noise, it began to grow, expanding outward and stretching her inner walls, until it eventually stopped. It seemed gigantic, the sensation of fullness intensified considerably, and, entirely horrifying, she began enjoying it. It felt almost as arousing as the continuous vibrations against her cervix, and her pussy was dripping wet.

"It's uncomfortable at first, but they grow into it." said the head groom as she patted Mackenzie's rump. "The older inmates become really restless when we remove their tails for grooming." She grinned as she felt Mackenzie's wet puffy labia with her fingers. "And it seems like we have a really horny one here. You'll be a sensation, honey, but we have to lock you up for now." Mackenzie felt a thick strap being pulled over her crotch. She moaned as it was buckled tightly to the corset, pressing firmly on her labia, now snugly trapped between the center and the side straps.

Between the constant pressure on her pussy, the mind-numbing vibrations on her cervix, and the gigantic plug up her ass, Mackenzie's senses were running into overdrive and she barely noticed that her reins were pulled while she was led outside the stall.