A pony suit

Mackenzie waited to get her overalls and shirt as the guard released her wrists from her handcuffs. So it came as a big surprise when her wrists were shackled again tightly at both ends of a yard-long bar and pulled above her head, forcing her to stand on her toes, lest she hung by her arms. "What.." She swallowed her words as the guard pulled the stun gun, and watched as the stablewoman approached and grabbed her face in her hand. "Welcome to Block F, sweetie. I'm Head Groom Dominguez. Now, I want you to stay quiet, or, swear to God, I'll make you regret the faintest sound."

Mackenzie made a small acknowledging peep and remained quiet as Head Groom Dominguez fitted her in a tight harness. The middle part was effectively a corset, thick and snug on her rib cage, and at the top it had straps that went around her breasts, lifting them while leaving them bare. The harness ended in two other straps that sat snug on each side of her puffy pussy, pushing it out and emphasizing her thigh gap. Mackenzie sat quiet as Head Groom Dominguez shod her feet into a pair of tall boots. Made out of a thin, but strong and stretchy material, they wrapped snugly around her calves and thighs, ending right next to her crotch. The boots **** her to stand painfully on the balls of her feet, stretched almost vertically and the soles felt extremely heavy when she the stablewoman made her spread her legs and arch her back. A zipper that ran from the ankle and locked at the top made sure that the boots sat into place.

What followed next tested heavily Mackenzie's ability to stay quiet. The corset/harness got carefully locked around waist, and a ratcheting sound followed as she felt the corset tightening around her waist, to the point where she could barely breathe. And if she wanted to protest, that ability was taken away quickly, as her head was bridled tightly and a bit was inserted in her mouth, together with a tongue depressor that prevented her to move. She was still standing bent as her arms were uncuffed then fitted in an impossibly tight armbinder, a monoglove that ran up to her shoulders and was tightly attached to the harness. By now, she was entirely encased in the pony suit.

"Almost done." said Head Groom Dominguez. "And now for the last details."