Flux grumbled to himself as he was awoken by a warm sensation on his groin. Groggily throwing his blanket aside, he peered down his chest and was welcomed with a wondrous sight. Lovingly bobbing her head up and down his shaft, Rainbow eagerly sucked his cock. Her eyes shimmered with excitement as she noticed his now awake state, and she soon doubled her efforts.

He wasn’t entirely sure how long she had been servicing him, but he found himself reaching his climax at an alarmingly fast rate. Feeling his stallionhood flare within her mouth, Rainbow engulfed his member entirely. His rod slipping down her throat, she clenched her eyes as she held her breath. Grimacing, clenching his eyes, he felt his balls pull up as he reached his peak. Ropes upon ropes of thick, warm seed spewed straight down Rainbow’s throat and right into her depths. Holding her head in place, he gently bucked his hips forwards as he rode out his orgasm.

Breathing heavily, he felt his climax coming to a close, and, seeing Rainbow peek open her eyes to look at him, motioned for her to release him. Following his orders, she slowly pulled her head up off his cock, dutifully swallowing any remaining ropes or cloys of his seed that left his member.

“Good morning, Master~” she cooed, stroking his member while looking up at him with lust-addled eyes.

Flux simply smirked down at her, pushing himself up and to an upright position. Months had passed since he had broken her, and many changes had occurred in that time. For one, he had moved into her home with her, utilizing changeling magic to disguise himself as her new coltfriend she met in Manehattan. Though, the biggest change of all was her.

Licking her lips, her eyes still looking crazed with lust, she shimmied off the foot of the bed and waltzed towards the bedroom door. Looking back at him, she smiled. “I’ll make you some breakfast Master, then hopefully you can give your slave her reward,” she noted, swaying her flank at the stallion.

Her devotion was undeniable at this point, fully accepting her role as his live-in cocksleeve and maid, but the changes she underwent were beyond just her mentality and behavior. Looking at her now, Flux felt his mouth water. She was positively gravid, having been properly and fully bred by him some time ago. Her perky bosoms had ballooned up to a pair of modestly large tits, her hips filled out, wide and horribly enticing to the eye, and her ass had become much more plump. Most notable of all of course, was the noticeable size of her stomach, the clear indication that she was expecting a foal in some months. If that wasn’t enough, the marking on her abdomen from Devotionis Vestigium glowed intensely, solidifying the fact that she had been fully and properly claimed by a stud.

Flux had decided some time ago he wanted to settle down with his slave, and have her be the dedicated mother of his foals. Having utilized a fertility spell from his tome, he had ensured she’d become pregnant without a shadow of a doubt. The crest on her had gone alight, and that’s all the two of them had needed to know. A few weeks later, she had gone on leave from the Wonderbolts, as well as informed her friends about the new development.

Needless to say, they were all quite perplexed by it, having never expected her to be the one to settle down and start a family - not first at least. Though, the truth is, they were right. The Rainbow Dash of before would have despised the notion of becoming nothing short of a foal factory, but Flux’s influence and carnal might had reshaped that part of her, and her entire personality as whole, into one that craved subservience and submission. He had wanted to start a family, and it was her duty as his slave to fulfill that request.

Seductively swaying her wide hips at her owner, the pegasus slowly exited the room and made her way downstairs. Slowly rolling out of his bed, Flux sighed to himself, content with how his life had developed. Sure, he could’ve pursued much much more than just Rainbow if he had wanted to, but he found himself more than happy with her being his one, and only, loyal slave. He knew deep down, if the Rainbow Dash of months past was able to see herself like this, she’d despise every single bit of it, and that’s all he needed to know to absolutely love how she turned out. The once potent prismatic pest was now nothing more than his pregnant, needy bitch, and that’s all she should be.

Magically putting the bed’s sheets together in a presentable manner, Flux sniffed the air and found himself met with an intoxicating aroma. The room reeked of Rainbow’s musk, her fruity scent fresh from her recent servicing of him, but accompanying that was the familiar, and extremely delicious, scent of hayfries being made in the kitchen downstairs. Licking his lips, both for the food he was expecting and knowing he’ll get to see more of the eye candy that Rainbow Dash had become, he quickly made his way out the room and downstairs.

Following the mixed aroma of food and tangy musk, he found himself walking into the cloud home’s kitchen. Greeting him there, with her flank towards him, was Rainbow. Squirming slightly, seemingly struggling to control her unending lust while she worked, she dutifully fulfilled her morning orders. She was meant to make him breakfast every day, after she’d wake him up with a blowjob, and thus she was fulfilling her directions. The crest on her abdomen continued to shimmer with intensified color, as it sent pleasure all throughout her for obeying her commands.

Adorning only a small apron, Rainbow shimmied in place as she continued to struggle with her task. She wasn’t the greatest cook as is, but with an intense, unending desire to breed flowing in her constantly, it only made the task all the more difficult. Snickering quietly to himself, Flux stared at his slave with hunger. Her ass swayed side to side, as she continued to try and control her carnal instincts, and her tail was flagged, showing off her doubtlessly winking snatch for his eyes to behold.

Though she had been properly bred and fertilized some time ago, it only helped to elevate her desire to be fucked. Having long ago abandoned the pony she thought she was, she was nothing short of addicted to him and his cock. Licking his lips, eyeing her pussy enthusiastically grasping at nothing, he waltzed his way over towards her.

Hearing him trot behind her, Rainbow glanced back towards the stallion. The sight of him nearly immediately filling her with adrenaline, her arousal soared by a magnitude with his presence. Her folds gushed with her arousal at an increased rate, her asshole throbbed, and her now melon-sized tits’ nipples became erect. Biting her lip, trying and failing to control herself, she turned away from the stove and positioned herself on the near counter. Arching her back slightly and presenting herself to her Master fully, she looked back at him as her tongue hung out of her mouth.

Though she didn’t speak a word, her deplorable state was all the encouragement he needed. Unable to control his own carnal desires, Flux trotted over towards the mare, rose onto his haunches, and draped himself over her. Feeling her shiver below him, as he sunk his hoof into her large tush, he prodded her entrance with his member.

“Does my sexy little foal factory want Master’s cock?” he teased, feeling her cunt flexing against his tip.

“Y-yes…please…” she mewled, having lost the facade of composure she had showcased earlier in bed.

Opting to give her what she needed, Flux pressed his hips forward and entered her depths. Though he had fucked her over and over for many months at this point, and she was positively gravid with his foals, she was still as tight as ever. Feeling her clench down onto him with a vice-like grip, he grit his teeth as he began to plow her with vigor.

Words failed to escape her, as all she could muster were incoherent mumblings and a sea of throaty moans. Wantonly throwing her hips back to match his thrusts, her enlarged ass jiggled wonderfully with each and every euphoric meeting. Her pregnancy only drove her further down the depraved depths of lust, and she couldn’t fathom a day without being graced with his cock. The Wonderbolts, her friends, and Equestria as a whole - nothing mattered more to her than serving her Master. She betrayed everything she was, opting to devote herself and all her loyalty to him and him only. As she continued to get pounded intensely by the stallion who conquered her, her large tits bouncing with each meeting, she felt her eyes flutter.

The sensation of his thrusts, the pleasurable surges the lewd crest on her gave her, the sounds of his breath, the knowledge that he had pumped her full of his rich seed and gave her a foal, it all sent her absolutely insane with lust. It was true, if she had seen herself like this many months ago when she was protecting Manehattan, she’d be disgusted. The old Rainbow Dash would never have thought she’d end up like this - as nothing more than a villain’s cocksleeve, but here she was, pregnant with his child and desperate for more dick. She felt that deep down she should hate this, that she shouldn’t have given up all her hard work and pride just for some good cock, but as he pressed against her depths further, she was reminded of a clear fact.

She was a bitch. She was a slut. She was nothing more than a foal factory. Most importantly, she was his.

Understanding her role, embracing it entirely, she felt her body seize as a wondrous climax wrought itself upon her. Shivering intensely, her snatch gripping and loosening its hold on Flux’s cock at a rapid pace, she rode out her orgasm. Her nerves went alight, her eyes rolled back, and her tongue lolled out, as she fought to keep herself conscious. The pleasure he delivered to her had shattered some time ago, but it still was as explosively euphoric as it had been the first time.

Leaning against the counter, panting heavily, sweat dripped down her form as she wavered in and out of reality. The sensation of fulfilling her newfound role in life, the role of Flux’s slave, was something beyond the concept of pleasure itself. Shuddering as she felt him exit her depths, she glanced back at him.

Flux licked his lips, eager to reach his own climax. Shifting his position, he brought the head of his tool to her throbbing asshole. Prodding her tush’s entrance, he leaned forward and whispered in her ear.

“You know slave, once you deliver that foal of mine, I’m going to pump another one into you in short order. ‘Rainbow Dash the Foal Factory’ sounds a lot better than ‘Rainbow Dash the Wonderbolt’ don’t you agree? ~”

Stuffling a moan, eager to feel him pounding her backdoor, Rainbow squirmed in place. It did sound better, more importantly it sounded right. She wasn’t fit to be a hero, she wasn’t fit to be a wonderbolt, she wasn’t fit to even be the Element of Loyalty anymore. All she cared for, and all she wanted, was to be exactly what her Master wanted. If it entailed her being nothing more than his cocksleeve to pump foals into, then she was more than happy to fulfill that role. She was his bitch, and with that meant she finally knew her true self. A foal factory.

“Yesssss ~ Master” she moaned, feeling him press his cock into her asshole slowly.

Throwing her ass back to match his thrusts, she felt herself smile. She’d be a good mother for her foals, and she’d be an even better slave for her Master. This was her purpose now, and for the rest of her days. With her admittance and acceptance of her destiny, the glowing mark on her abdomen shimmered with color.

And it was the brightest it had ever been.

Author's Note

Little bonus alternate Epilogue for all those of you who were craving an end result with some pregnancy!

I've never even tried writing anything with some pregnant elements to it, so I hope I did alright with it here!