"Cast no magic of any kind," is the first order Mira receives.
Mira wants to protest that surely some of her magic is harmless and just for convenience, but a sudden cringing repulsed feeling sweeps over her and stops her in her tracks. She is too distracted by the mysterious phenomenon to protest again.
The Lucratites assume this means the slave collar is working as intended.
Mira's nude body is shackled into place with thick leather cuffs. A soft silicone gasket sort of thing holds her waist secure in the middle of an interior wall. On one side of the wall, her lower half is presented and exposed to a comfortable lounge where guests may make use of her holes alongside several other wall-mounted slavegirls. Her thighs are bolted to the wall and her ankles are shackled to the floor, keeping her hips poised to present her ass and pussy for maximum appeal.
On the other side of the wall, Mira's upper half is locked into place with padded metal bars, presenting her breasts for easy access. The milking machine is mounted right under her, pressing the ends of its suction sleeves into her areola, making sure her nipples can't slip free no matter how she wriggles. There's a horseshoe-shaped seat for her face, with a pink silicone dildo sticking out of it. At the Lucratites' order, Mira is forced to impale her throat on the dildo and then have her head strapped securely to the seat, leaving her with nothing to look at but the floor. The dildo is hooked up to a tank of lightly-sugared and even-more-lightly-salted water, and will slowly trickle the liquid into her stomach to keep her hydrated.
Once Mira is locked in, and the milking machine turned on, they close her up in her little 'backstage' cubbyhole and only come back to collect her 'milk' and to refill her feeding tank.
The Lucratites confirm that Mira has the mutations she's supposed to, and... that's it. Her optimized digestion means that she doesn't need bathroom breaks. Her cleanliness mutations mean she doesn't need hygiene breaks. Her Slut crest means they don't have to let her see a fleshcrafter to make sure she's not pregnant. Her full suite of sexual mutations means they don't have to ration or micro-manage access to her holes. And thanks to her regeneration, they don't need to let her out to stretch either.
They can just, leave her there, mounted in the wall, with the milking machine sucking away at her breasts. For as long as they want. Days. Weeks. Longer.