Thank you to Sjeiejsjns for the idea 😊 Hopefully it turned out okay. And thanks also to Omn1Viewer for pointing out that I was coming up on 999 captions, so it would be fitting to do the 9th one of this series.

Hopefully I can continue it although I think I'm running out of ways to torment and humiliate Aiden further, short of him getting fully brainwashed into being a mindless mare, or a full-body conversion 😅

It was a frosty Saturday morning as she crossed the farmyard. The plastic hose she hauled behind her steamed from the payload of warm milk held within. She stepped inside the barn and found the Receptacle still sleeping soundly in his bed of hay, cozily encased as ever. The suit was a snug fit indeed these days. Beneath the metal, a steady drip of estrogen and progesterone directly into Aiden's bloodstream had granted him his very own set of burgeoning breasts, the sensitive flesh pressed tight against the armored chestpiece. Katherine was sure the engineers could easily adjust the suit to accommodate his new appendages comfortably if only Aiden's male pride would allow the installation of a suitably fitted breastplate.

He was understandably sleepy this morning. The sheer number of exhausted, satisfied stallions resting in close proximity was a testament to his hard work. The mares were nowhere to be seen - barely involved in their breeding process itself anymore, their time was now now devoted to gestating the next generation of racehorses. Heavily pregnant, they had been moved to their own quiet field, where they jealously watched over the fence as the new machine had all the fun with what had once been their stallions.

Aiden had become an invaluable tool for the farm, earning them a fortune by vastly boosting the harvest from the studs. She felt terrible waking him so early, and carefully lifted up the ginger nylon tail, exposing the array of receptacles in the rear end of the horse-shaped animatronic. Some were steel sockets for receiving power and data, for use whenever the engineers performed Aiden's seasonal software update. The larger, rubber-and-silicone sheathes were used to receive Aiden's supply of nutrients and other biological goo. These had seen far more vigorous usage. A third soft, silicone hole had been installed recently, and it was into this that she thrust the business end of the milk hose. A spurt of thick, hot milk began to gush into Aiden's body. The inside of his buttocks had been hollowed out, removing many of the powerful servomotors to make way for a pair of heated chambers capable of storing gallons of fluid. It was a considerable downgrade in terms of horsepower, weakening and slowing the once powerful gallop of his rear legs to a more respectable canter. He wouldn't be winning any races any time soon, nor escaping any eager males - precisely how she liked it.

"Huh?" he groaned groggily, his steel form twitching as he was startled awake. "What time is it?"

"Did I forget to reactivate your voice last night? Don't let your boyfriend catch you speaking like a human" she giggled.

"They're not my boyfriends," Aiden said with a prissy stamp of his hoof, sounding high and pouty even through the speakers that transferred his voice from within the suit. He was always a grumpy little mare in the mornings after rigorous usage, when the rush of mind-numbing chemicals filtered out of his system. She wondered how aware he was of the subliminal conditioning guiding him back toward his new function. There were times when he put on a show of resistance, though was always quick to slip back into the comfortable role of a mare laid out for him. "What are you doing back there?" he asked, craning his equine neck.

"Configuring you. Today you have a new purpose."

"Oh! Are we training today? Finally!" he exclaimed. Practically chomping at the bit, he clambered to his hooves. The rubber tube inserted in him scraped in the straw. He waggled his rear, futilely trying to shake it loose. "Hey, what the hell?"

His internal milk chambers reached their capacity and began to overflow, funneling down into his new appendage. Beneath his torso, a pink rubbery sack gurgled and filled, his four thick teats engorging. "I've brought you a surprise," Katherine said with a wicked sneer. She stepped aside as a gangly foal wobbled across the stable. "This is Champion. Isn't he gorgeous? He's got the makings of a prizewinner, don't you think? You must be so proud - he's the first foal you ever helped conceive! You're going to help raise him... along with the others. I know you'll make a fabulous mommy."

"'Mommy'?! You gotta be shitting me! These are not the upgrades you promised me," Aiden snarled, waggling his rear end indignantly, sending milk spraying from his full rubber teats.

Even if Aiden was wary of the maternal role, Champion understood what to make of this dispenser before him immediately, leaping forward to suckle hungrily. Aiden gasped. The blood-modulating AI of the suit immediately flushed his bloodstream with a heady rush of oxytocin and other chemicals designed to promote bonding. Aiden rocked unsteadily as the pregnancy hormones assaulted his brain.

He stomped his hoof again though notably failed to move away with his new ward. His new hindquarters sloshed with gallons of fluid. "How the hell am I supposed to win the race weighted down like this? How long do we even have left to train? A month? Two?"

Katherine giggled and reached up to flick the helmet switch, instantly transforming Aiden's speech into nothing more than indignant whinnies and snorts. "Oh, my poor breeder, don't you know that horse pregnancies last twelve months? You must not have been paying attention to the calendar - the race was a week ago! Too busy pleasing your stallions to care, tsk tsk." The robot horse screamed in furious realization. "There's always next year, I suppose. Although I might just enter one of your colts instead."