In Which Diamond Tiara Makes Poor Life Choices [Macro] [Femdom]

"Silver! Open up! I've got something awesome to show you!"

“Ngh, go… go ‘way.” Silver groaned and buried herself deeper in the covers, barely daring to check the clock. Whatever terrible dream she was having right now, it was being too loud.

“Silver, if you don’t get up and come here immediately, daddy might just happen to find out about you-know-what.”

That got Silver’s attention. She bolted up, barely pausing to rub the sleep out of her eyes before she put her glasses on. “C-coming!” she shouted, trying to find her slippers. “I’ll be right there!”

The strangeness of the situation only demanded further haste. Diamond Tiara wasn't one to get exceptionally excited over nothing. She prided herself - often - on her levelheadedness. Calm, cool, collected. Smart. So her banging on the door to Silver's room, squealing with barely contained excitement, was incredibly unusual. Doubly so this early in the day - the sun wasn’t even remotely risen yet.

The banging only grew louder and more insistent as Silver bolted to the door, a proper mess without her usual morning grooming. Her mane, typically brushed and braided to perfection, was an unruly bird’s nest, and she’d have preferred to die before going out in her ducky pajamas - but she could never afford to keep Diamond waiting. Morning or not, anything Diamond wanted demanded the utmost haste.

...Not because Diamond deserved it, or anything like that, but because it was always much easier to do things her way than to argue about it. Diamond was more stubborn by half, and had much better vocal chords for shouting. Plus a full head's worth of height on her. No sort of argument would ever end with Silver Spoon as the victor, so it was simply much less of a headache to play the submissive.

She let out the yawn she’d had brewing before opening the door, apologizing for her lateness with a quick bow. "Yes, Diamond?"

Behind the door, Silver found a manic, grinning Tiara. Something was different - it had to be, or she wouldn't have up nearly this early. Diamond’s normal waking hours started somewhere around noon, if not later. And yet, here she was, at five in the morning, grabbing Silver by the arm and dragging her off to wherever it was that they were going? Silver didn't really know. All she knew was that Diamond Tiara hadn't bothered to put on any real clothing herself. She was only wearing a translucent pink nightie, underneath which were a lacy white set of lingerie, snug and slightly too small for her. The straps dug tantalizingly into her abundantly soft, supple flesh, and Silver couldn't help but steal a glance or two while they were on the move.

"Here we are!" They arrived outside of Tiara's bedroom - Silver had been rooming in Tiara's home in lieu of getting her own place. It was cheaper, and the sex was decidedly not a deterrent either. "It finally came! I spent all last night setting it up and - aaaah, I just can't wait to try it out!" Tiara grinned, bouncing with barely contained glee (which, Silver couldn’t help but notice, had the delightful side effect of sending her ample feminine curves jiggling).

"You can't, um..." Silver trailed off as her eyes zeroed in on Diamond's ample body. It was hard not to, especially with the way her physical expressions of excitement set it in delicious motion. Diamond had always been the taller of the pair, and after puberty she'd easily asserted her place as the bustier and the curvier, too. And it wasn't just next to herself, either. Even stacked next to Apple Bloom's height, Sweetie Belle's bust, and Scootaloo's lean, fit physique, Diamond Tiara compared favorably in all categories.

"Can't wait to try what out?" Silver Spoon finally finished her train of thought, blushing slightly. If nothing else, the view was certainly a nice perk of their friendship. “Did you order something?”

"Oh, didn't I tell you about it?" Diamond gave Silver an exaggerated wink. She flung open the door to her room, revealing...

...a scale model of Ponyville? It was obviously smaller than the real thing, but it was still massive by anypony’s standards, taking up most of the available floorspace in Diamond’s room. And Diamond's room was nearly larger than the whole Ponyville schoolhouse. The replica itself was clearly painstakingly accurate - Silver could tell even from a distance that hours and hours of effort had gone into making the perfect replica of her hometown. From the craggy peaks of Canterlot mountain to the frosted architecture of Sugarcube Corner, it seemed accurate in every possible dimension. Getting closer to it brought more and more details to light. Here, a street sign Scootaloo had knocked over ages ago that had never quite stood perfectly upright since. There, the weathered paint on the Sweet Apple Acres farmhouse, peeling away in exactly the places Silver remembered, albeit in miniature.

"So," Tiara said, grinning so widely her head was in danger of falling off. "What do you think?"

"Um..." Silver yawned, still working off her exhaustion. It was a nice model, to be sure. A fantastic model, even. Silver’s mind boggled considering how much time and effort must have been poured into making it. But, at the same time, it was certainly nothing to get this excited about. In fact it looked a bit like those model playsets Diamond had always obsessed over when they'd been much... younger. She cocked an eyebrow at Diamond, trying not to look too judgmental. "It's nice," she said, to start things off. "But, Diamond, don't you think we're... um... just a bit too... old? To still be playing with toys?"

"Please, Silver,” Tiara waved dismissively. “If my father can spend hundreds of thousands of bits on scale models of Baltimare and Manehattan and whatever for his dinky little toy trains without anyone judging him, I don't see why I can't do the same." Her facial expression morphed slightly. Less gleeful and more... lascivious? Was that the right word? There was definitely a predatory aspect to that smirk she had on. "Besides, this isn't just any old playset. It's enchanted."

Enchanted! Silver's ears perked. Diamond's idea of an enchantment was usually fun, when it was for the bedroom and not a mean-spirited prank. She took a glance back at Diamond, supple, palm-filling breasts still jiggling beneath her nightie as she bounced from hoof to hoof.
"I guess that makes it better," Silver murmured. She reached out a hand, almost as if to touch one of the little buildings, but thought better of it at the last minute. Best not to play with magic she didn't understand just yet. "But enchanted how?"

"Oh, you can probably guess," Tiara purred, twirling a lock of lavender hair idly around an index finger. "It's actually designed for foals, but I had some... special modifications made to it. Removed some limitations designed to keep things foal-safe~ It was expensive, of course, but it's all on Daddy's wallet. You know how he is! Anything to please his little princess~ Suffice to say," her grin widened, even more predatory than before, "you're going to like it. I promise."

“Well..." With that hint, she probably could guess what the enchantment was, now. Silver had read about something like this before: miniature landscapes that foals could enter and manipulate to act out their imaginations. There were usually safeguards, though, that kept anything too sexy or inappropriate from happening. Safeguards that Diamond had undoubtedly removed. Silver bit her lip, mind racing with all the possibilities that total control over a little Ponyville made for. The both of them goddesses, acting out all their wildest fantasies in a world they both-

"Wait..." Then she remembered something else about playsets like these, and her heart suddenly sank. Any number of ponies could take part in whatever world the playset's Owner created, but... "Diamond, isn't only one pony allowed to be the Owner?"

Tiara rolled her eyes. "Yeah, so? The way I see it, that just makes it more fun!" She leaned in close, having to duck down slightly in order to get to her desired position, her face almost buried into Silver's ear. "Think about it," she purred sensually, sending a shiver down Silver’s spine. "You, alone in Ponyville, at the mercy of my every whim. Every kinky, dirty, filthy little idea that pops into my head becoming a delicious reality~" She gave Silver's ear a gentle nibble. "And I do mean anything. What with the modifications I had done, the limits I had removed, the only limitation is my imagination. And I'm a very imaginative pony when it comes to sex, Silvy~"

And then, just like that, she pulled back. "In short, don't be such a wet blanket, babe. Just go with the flow and let's fuck like animals." Without a further word, she grabbed Silver and flung her forward into the playset, laughing as she jumped in gleefully after.

"Ughhhhh." Diamond Tiara had the worst fucking hangover. She glared angrily at the sun, flittering its way into her bedroom through one of her massive windows. "Fuck off, sun," she muttered. "Motherfuckin'..." She stretched and scratched herself idly as she got out of bed. Slowly and deliberately. She looked at the time - 9 AM. Celestia's tits, it was way too fucking early to be awake. She shed her blankets and groggily left her bed to get dressed and grab some coffee.

She wasn't wearing any clothing, she’d noticed. That was… odd. She definitely remembered wearing actual bedware - her transparent pink nightie and the lacy white undies that she’d specifically bought a hair too small because she knew that it drove Silver fucking wild. Silver's favorites. She couldn't quite remember why she'd been wearing them, though. Something about... a surprise? It couldn't just have been an early morning quickie. She reserved that outfit for special occasions.

“Hm.” Her sleep-addled mind dimly recalled something to do with a playset? But there was no playset in her room. It hadn't arrived yet. Oh, yes, okay. That was it. She'd only dreamed that it had come in, and woken up just before she’d gotten to the good bit. She nodded knowingly, flinging open the doors to her enormous walk-in closet as a cloud passed over the sun, the light dulling slightly. She grabbed something at random - just for the sake of having something on. A keyhole sweater that she didn't remember owning. Dimly, she recalled Silver begging her to get one of those, but it had never really been Silver’s place to dictate her wardrobe. She shrugged and slipped the thing on anyway. Whatever, as long as it fit.

"Coffee! Three sugars, extra cream!" she shouted to the servants downstairs. The usual chorus of affirmation was strangely absent, but some days the servants were just quiet. It wasn't her business to control their volume, as long as they got the job done… Though, speaking of that... "And it had better be hot by the time I get downstairs!" she added.

Orders given, she dipped into the bathroom to freshen up. The morning routine went without incident: manestyling, brushing, and all that. She paused only briefly while measuring out the toothpaste for her toothbrush. The tube was the customary red of her usual Cinnamon Blaze, but she could have sworn she'd stolen Silver's tube of Minty Blue just last night when she'd run out... Diamond shrugged. Not her problem either.

What was her problem, though, was that none of the servants had her coffee waiting for when she got downstairs. In fact, none of the servants seemed to be anywhere at all.

"Ugh." Diamond groaned and stepped into the kitchen to put the coffee on. Useless, useless, useless. It was probably one of those worker holidays the servants always thought they were owed. What pains in the neck. And where in Celestia's name was Silver Spoon? Even she'd gone absent without getting the coffee ready for her! "Double ugh," Diamond grumbled. She'd be giving Silver an earful for that later.

Tiara grumbled all the way to the kitchen. She preferred not to make her own coffee this early in the morning, but given the choice between going without and making it herself, she had to pick the latter. It wasn't like making coffee herself was difficult - she had spent several thousand of daddy’s bits on a very fancy cappuccino machine. No muss, no fuss, just press a button and get coffee. She'd gotten herself coffee before, but for the first cup there were several more steps - add fresh water, add fresh beans, run a cleaning cycle. More steps than she was usually willing to put up with. But put up with them she did, muttering vague promises of righteous vengeance under her breath all the while.

It took her ten minutes to get her morning coffee. Ten minutes that thoroughly soured her mood. "Fuckin'..." she growled. "Where is everypony?" Diamond took a drink of her freshly brewed, piping hot coffee, scratching her bare ass - she hadn't bothered to grab any bottoms. Or underwear. Or anything other than the tight keyhole sweater. It was long enough to mostly cover anything that could get her in legal trouble if she poked her head outside for whatever reason. For example, to see where the fuck everyone had gone. "Silver!" No response. "Daddy!" No response. "...Mother?"

Nothing. No one responded. It wasn't surprising that any one of her housemates would be out, but all of them? At the same time? This early in the morning? No, she thought, frowning and shaking her head. This wasn’t normal. "Where the fuck did they even go?" She stormed off, making her way through the dimly lit manor she called home. That was also somewhat odd. It had been bright and sunny outside when she woke up, but then that cloud had passed across the sun and since then the light had gone dim and dull. If anything, the sky had only gotten darker since waking. It felt more like evening than morning.

She reached the front door, threw back the rest of her coffee, threw the cup over her shoulder (she could always get a new mug, and breaking this one was delightfully cathartic), and threw open the door.

...To find no one. Not a single pony milling around in the darkened town. "Maybe it is a worker's holiday or some bullshit like that," she muttered. "I guess that's why no one's around?" It was definitely going to storm. It was apparently overcast, and the air was hot and wet, in that way that the air only got immediately before a massive thunderstorm. Tiara groaned loudly. "It'd better not be about to rain," she muttered. "Because I'm not making my own food and if I can't at least get to a restaurant I'm going to murder someone. And that goes double if they’re all closed!" she shouted, as if one of the absent ponies might overhear her irritation and make certain that there would be somewhere for her to get lunch. She glared at the empty town, as if the force of her irritation could change the weather. It didn't, so she turned her focus upwards, to the presumably angry, dark clouds above her.

And then she noticed that there wasn't a cloud in the sky.

"...What the fuck?"

Something was definitely wrong. She turned her gaze further up, and up, and up, scanning the sky for whatever was blocking the sun.

And then she saw the cause.

"Oh."

There, far above in the sky, were the two biggest tits she'd ever laid eyes on. Not in a hyperbolic sense - they were beyond massive. Mountainous, sun-eclipsing knockers topped with nipples that had to be the size of a poorer pony's house. She let her eyes wander back to their owner, over the all-encompassing wall of dark gray fur that had risen behind her mansion. Her vision trailed down a smooth gray stomach big enough to build another Ponyville on, down and down and down... Until her eyes met a fat, pink-lipped pussy looming like a monster over her house. It looked nearly big enough to swallow the mansion whole, clit throbbing happily as it pressed ever so slightly against the very tallest towers. Diamond's nostrils flared as she realized the air wasn't just hot and humid. The atmosphere was thick with a musky, nigh-on overwhelming haze of arousal.

"Hey, Diamond!" rumbled Silver Spoon's voice, times a million. She giggled, and the ground shook unsteadily beneath Diamond's hooves. "You're a late riser, aren't you? I got so bored of waiting that I decided to play around a little. See how big I could get." Again, that earth-shaking giggle. The tallest tower of Diamond's mansion buckled, almost ready to tip over as Silver's clit rocked ever so slightly against it. "But being the size of the playset's universe got a little boring, so I settled on big enough to straddle the town. What do you think?"

“What do I…? Ugh, I see what happened." Tiara pinched the bridge of her nose. "I forgot to designate myself as the Owner before we jumped in, so somehow it defaulted to you. Great." She groaned. "Well, it's an easy fix. We're just gonna have to start the whole thing over. Irritating, but whatever." She took a deep breath, and immediately regretted it, her nostrils filling with Silver’s burning sexual musk. Instantly, she felt overly warm. Hot. She could feel herself panting as her body was enveloped in intense, burning lust. "Silver, get back to normal, you're making me horny and it's too early for foreplay. We need to get out of here so we can do this right."

"Mm..." A titanic finger dipped down to earth, brushing itself gently over her clit. A warm, gooey feeling rose around Diamond's hooves, and she yelped as she realized she was standing in a rising tide of Silver's arousal. "Nah, not really feeling it. C’mon, let’s actually have some fun first! You said it yourself, Diamond, it'll be sexy!"

A second Silver Spoon, smaller than the first but still titanic next to Diamond - easily twice the size of her mansion - peeked her head over Silver's wall-like thigh. "Plus, look how cute you are!" She grinned as she scooped Diamond up like a grain of rice… along with a generous helping of the first Silver’s juices. "You know, I always thought you'd look great in a keyhole sweater."

"Silver, this isn't funny," Tiara snapped, blushing deeply. Her sweater suddenly felt warm and wet as the fibers soaked up Silver’s copious arousal. She wrinkled her snout, trying to focus on breathing through her mouth instead to avoid inhaling any more of that delicious musk. "We can have plenty of fun when I'm in charge like I’m supposed to be. Now, put me down and let's just-" she suppressed a groan, subconsciously rubbing her thick, feminine thighs together. "Let's just go home, okay? And do this right?"

The two Silvers giggled in tandem. The larger one rocked her hips ever so slightly forward, lips pressing gently, but insistently on the back of Diamond's mansion. Though she knew it was only a magical recreation of her real home, Diamond couldn't help but wince at the idea of her best friend using it as a makeshift dildo... nor could she help blushing, her thighs clamped together as the image made her even hotter.

"I don't think it's a good idea to go home just yet, Diamond," the smaller Silver said, as casually as if she were discussing the weather. She swung her hand over toward the mansion, giving Diamond a full view of her larger self’s ever more insistent motions. Stone walls built to last a thousand years were already beginning to crack and crumble for Silver’s pleasure. "You might need to get a few repairs done first, once I'm done with it. You know how I can get sometimes." She giggled as she dipped a finger into her palm, sticking the juice-soaked Diamond against the pad. "And I know you, Diamond, so I know when you're playing hard to get. I can practically smell how turned on you are, and you're quite literally swimming in how turned on I am right now. Let's play a little."

Tiara frowned. Playing hard to get?! "Silver," she growled through clenched teeth. "We are going to leave the playset. And then we're going to go back in, with me as the Owner. And then we can play all you want. To your heart's fucking content." She turned away, crossing her arms and closing her eyes. "And until then I refuse to play along with this charade."

It took far more willpower than Tiara was comfortable admitting to resist Silver's offer. Between the two of her, and a little of Diamond herself, the air was completely saturated with intense sexual musk. It was overwhelming and mind-numbing. It was all Diamond could do to not give in to the enormous mares’ demands. Give herself over to raw desire. It wasn’t like she’d never fantasized about being the bottom before. There was something tantalizing about being so completely overwhelmed, enveloped in sex with no option or opportunity to object. No, it wasn’t the situation that Tiara objected to. It was the way that it had come about. There was a world of difference between Tiara giving herself and Silver taking her the way she was. Something about it made her afraid, a deep, primal kind of fear.

And something about that fear made the tingles running down her spine all the more intense.

"Stubborn, aren't we?" Silver winked, with an eyeball bigger than a dozen Diamond Tiaras put together. "I see how it is! Don't worry, Diamond, I think you're going to like this game of ours. And it's only fair! You always get to make the rules. Maybe you'll like it more, letting me take-"

The world seemed to pop. Suddenly, Diamond found herself not precariously suspended hundreds of feet in the air, but sitting safely on a carpeted floor... in some awfully revealing corporate attire. The skirt was so short it couldn't possibly be decent, and the neckline cut almost too low for her comfort. Silently, she could only thank her lucky stars that she was dry and not sticky... though she blushed at the results of a quick sniff test. The faint scent of Silver Spoon was still clinging to her fur.

"-charge," Silver said, seated at the chief executive's desk. She seemed a bit more modestly dressed, in a smart black work jacket and matching pants, but something about her seemed too big by far. Sitting down, she was nearly eye level with Diamond, the fabric of her outfit stretched near to bursting with her seven-foot frame. "Now, Miss Tiara, I believe you had the earnings reports for the quarter?"

The Biggest Name in Business [Macro] [Growth] [Futa]

"Silver, I just told you that I'm not going to play along with this. I’m not going to play office with you, or whatever this is supposed to be," Diamond Tiara didn't say. She wanted to, but she couldn't. The words completely and utterly refused to come out. "Yes, Miss Spoon," is what she said instead. She approached her employer's desk, placing a three inch thick file in front of her. "Where would you like me to start, ma'am?"

"Start with sales numbers, Miss Tiara." Silver grinned. "I have a feeling that we've managed to..." The seams of her coat dress strained audibly as she spoke, just on the verge of an outright tear. Faint patches of pristine gray fur could be seen where the fabric had been stretched too thin. "...expand into some new markets lately."

"Yes, ma'am." Tiara screamed internally, though her face refused to show any outward indication of her inner fury. How dare Silver disobey her like this? She opened the folder, pulling out several of the papers within and spreading them out across the desk. "As you are no doubt well aware, Miss Spoon, we've recently opened a new Adult Toys and Entertainment division. And its performance has been..." She took a deep breath, trying to stop. To end this scenario and return to her petulant refusal to let Silver be the dominant party.

"Its performance has vastly exceeded expectations. Profits are almost three hundred percent above the projected numbers, ma'am."

"Mm, is that so?" Silver Spoon's grin widened, swivel chair creaking as her head rose inch by inch into the air. The desk between her and Diamond vanished, an unnecessary piece in the game, as she stretched her lengthening legs. Diamond noted, with some trepidation, that Silver was approaching nearly twice her height. Even if she could rebel physically, tackle Silver in a desperate attempt to regain control, Silver could pin her down easily… and ever more easily as she stretched even higher.

"Three-hundred percent," Silver moaned appreciatively, the buttons of her suit popping one by one as dark grey titflesh tore through the fabric. An onyx-black cock, almost the size of Diamond's forearm pulsed beneath her pants leg, swelling thicker and fatter in stride with its owner. The air itself filled with a palpable musk, not unlike what Silver had covered her in earlier. But something here was different. It was more overbearing, more insistent... More masculine.

And all the while, as Silver inched higher, the office itself was expanding around her. The whole room seemed to be growing beyond Diamond’s scale, concerned only with keeping pace with the company's most important assets. "Mm," Silver groaned, the remnants of her suit practically see-through with all the tears her supple gray body had torn in it. A thick blob of glistening pre seeped through the fabric, redoubling the intensity of her overwhelming musk. "And how about our clients? Did anyone important sign any big deals?"

"Yes, ma'am." No, no, no, no, no. "Hugh Hoofner signed a deal with us. We are now the exclusive provider of sex toys, lingerie, and aphrodisiacs for both Playcolt and Playfilly." Stop replying. "We also now exclusively supply lingerie and cosmetics for several gentlecolt's magazines and fashion magazines." Stop playing along. "We've also recently received an order from Princess Cadance of the Crystal Empire. Four hundred billion bits worth of sex toys and aphrodisiacs." Tiara felt a heat building deep within the core of her being. She cringed internally, but externally she undid the topmost of her blouse’s buttons, revealing slightly more of her cleavage. "All told, this quarter's profits are beyond expectations. More than..."

A hand wandered south, caressing her abdomen gently.

"More than one thousand percent above the projected profit margins in total. Enough to easily buy my father's company several dozen times over, and still have trillions of bits left over."

Tiara groaned, her cunt spasming around an invisible cock. Why was she getting off to this? None of this was real. Silver had only imagined a sprawling business empire that dwarfed her father’s by impossible margins, and used her total omnipotence within the game to bring it to life. That… That wasn’t hot! The sheer wealth, the power Silver could grant herself just by thinking of it. She wasn’t getting off to that!

But Silver certainly was. "Ooooh, fuck!" Silver's eyes nearly rolled back in her head as she tripled in size right there, the office barely keeping pace with her growth. Clothing tore and shredded away as height stacked on foot by foot at a time, leaving her a naked, growing goddess on a plush black swivel chair. And even that was starting to look a bit snug, as her hips blew outward faster than the chair could grow, filling her seat in nicely with thick gray-furred thighs.

Looking up, and further up with every second, Diamond was starting to feel so very tiny down below. She shivered as she felt the rising carpet fibers brush up against her calves. What was a merely a simple office to the ever-growing Silver was turning into a sprawling jungle for her ‘lowly’ secretary. Diamond gulped, clutching onto her files as Silver’s musk and arousal saturated the room. She didn’t want to think about where her hands might end up if she let them wander on their own.

"Here, Miss Tiara," Silver said, stifling a laugh, "Why don't I help you with climbing the ladder?" She scooped Diamond up, setting her gently down by the towering black obelisk of her throbbing stallionhood. "Remember the rules of business," she murmured, motioning for Diamond to continue reading. "Quid pro quo. I helped you up, why don't you help your boss have a little fun, in turn?"

"Mngggggggg," Tiara groaned. She stared at the enormous cock, barely containing her overwhelming arousal. "Yes, ma'am," she murmured, her breath heavy. One hand was clenched tightly into a fist, positioned above her cleavage. The other was hovering above the edge of her skirt. "We've, um. In addition, we have, um, acquired several other companies. We, um." She couldn't take her eyes off it. That big, juicy, luscious monolith of flesh. "Since acquiring them and placing them directly under your expert leadership, their profit margins have all increased significantly." But she had to. She had to tell her employer the exact figures.

She collapsed forward into the enormous black cock, already bigger than she was by a fair margin, groaning pitifully as she wrenched her eyes back to the papers. "Of our twenty new acquisitions, the lowest performance increase was 48%. The highest was - gnnnfuck - the highest was 150% oh Celestia."

"Such a dedicated secretary," Silver purred, her growth accelerating at breakneck pace. She gave her cock a loving stroke, holding it up to measure her own growth against her faithful secretary. “Working so hard to help me with these matters.”

Diamond stood straight up against the warm, fleshy pole of her master’s shaft… only to make Silver’s measuring easier. She struggled valiantly to maintain that calm, professional demeanor, even as she found herself grinding idly against it. Within seconds, Silver’s medial ring had slipped above her head and out of reach. Minutes later, it was thick enough for Diamond to sit on, the shaft itself a proper skyscraper. With every statistic Diamond relayed, Silver’s growth jumped, balls churning and swelling as a waterfall of sticky precum ran down her shaft and over her faithful secretary's head.

Silver sighed, groping and jerking herself as her empire expanded, her executive office big enough that it could easily encompass the whole of Equestria... and at her whim, it did. The whole nation was laid out before her like a map on her carpeting, Canterlot Mountain barely knee height and still shrinking. There was no doubting now who the biggest name in business was.

Diamond gasped as Silver reached a hand up and wrapped her titanic fingers gently over her body, pressing her friend-turned-secretary insistently against her warm, slick shaft. "Nngh..." Silver grunted. She was almost there. And so was Diamond. They were both close. So, so, so close! "And... and now that all that's clear, Miss, mm, Tiara... What's our outlook for the next quarter?"

“We - oooohfuck" Tiara quivered. There was a rapidly dwindling part of her trying so desperately to resist. To regain control of the situation. But that part of her had no say in the actions of her body. The words that came out of her mouth. She pressed herself against the gigantic cock, reveling in the overwhelming musk, the torrential downpour of sticky precum. "Assuming we maintain this rate of growth, Ma'am, we - nghhhhhh - we will be the biggest company in the world within the first week of the coming quarter." she groaned, her breath coming quickly and shallowly. "Oooooh, within the first month, 99.9% of the world's economy will be directly under the influence of our company, ma'am."

"In other words..." Silver groaned as she stroked her monstrous, mountainous shaft with both hands, her little secretary sliding easily along in the flood of precum seeping from the tip. She bucked her hips. Slowly first, then faster and faster, in a steady, earthshaking rhythm. The vibrations of her continental ass colliding with the chair travelled down into the floor, rumbling and reverberating through the tiny nation of Equestria. She didn't care at all for the untold damage her lust was having on the little country, the thick musk of her arousal roaring like a hurricane over cities as her thrusting rocked them from below. Silver was rich enough to rebuild it a hundred, a thousand, a million times over! And she really fucking needed this right now.

"Next quarter, we’ll finally achieve..." Silver gasped as her hands picked up pace, Diamond barely a tiny pink blur lost in her arousal. She was thrusting in earnest now, hips colliding catastrophically with her faux-leather chair. "Total." Slam. "Market." Slam. "Saturation!"

She came with the force of a dozen atom bombs, balls the size of cities each contracted as rope upon rope upon rope of cum gushed out. Equestria was submerged in an ocean of cum, Canterlot the lone island in a sea of white until even it sank beneath the rising tide of Silver Spoon's orgasm.

And still her orgasm continued, far longer than it had any right to, fuelled as Silver got off not just to the physical pleasure of stroking a cock thicker than her hometown, but the simple knowledge that in this world she could do this again, and again, and again, however many times she wanted. And next time, she could be even bigger.

By this point, Silver's cock was so monstrously mountainous that Tiara couldn't even manage a tentative grip on its vast, slick surface. Instead, she clung for her life to the pale grey fur of Silver's ballsack. She shoved her face into the titanic balls, immersing herself in the overwhelming masculinity as her hips bucked desperately with need. She moaned, cumming just from the musky, powerful scent of Silver's raw, overwhelming sexuality.

It was, ultimately, not Silver's wild thrusting - each pump of her hips like a cataclysmic earthquake to the comparatively speck-sized mare - that caused Tiara to lose her grip, though it certainly contributed. No, it was Tiara's own mounting series of orgasms that caused her to falter. One hand slipped, and then the other, sending her flying through the air and into the endless stream of Silver's cum.

Finally, Silver's orgasm reached a satisfying, sputtering end. She sat there for a moment, sighing in the warm afterglow as thick, gooey cum dripped from every corner of her office.

"Hup!" She took herself up on her hooves and stepped over an Equestrian mountain range, where a little pink secretary had landed in the midst of her orgasm. "Gosh, Diamond," she giggled, scooping Diamond up from a lake of her still-warm seed. "I never thought you'd make such a good secretary!”

Diamond could only groan, little bubbles of sound through her coating of Silver’s thick cum. She could barely think right now, senses overloaded with sex. There was no brainpower left for a snarky, defiant response to Silver’s taunting, even if she were big enough for Silver to hear it.

“But the corporate life just isn't for me,” Silver continued. “I think games like these always suit you better than they do me. I’ve always been more about sunshine and fresh air than stuffy business suits. I think I'm ready for something just a liiittle different."

She snapped her fingers, and again the world around Diamond changed.

Got Milk? [Macro] [Growth] [Breast Expansion] [Futa] [Cow-Pony]

Tiara woke up a in half-daze, sitting on a warm, comfortable... hay... bed. Her nostrils flared as they took in the scent of hay, old barn wood, and all sorts of other farmyard smells. The Apple family farm, her first instincts told her. Then she realized that, no, she was still in the game. The last thing she'd been doing was swimming in a sea of Silver's cum, and this new locale was undoubtedly another of Silver's fantasies.

Idly, she brushed a speck of dirt off her thigh, then froze as a spark of electric pleasure ran up her spine. She wrapped her hand slowly around the warm, fleshy appendage rising up proudly from her crotch, shivering as it throbbed in her hand. A real, honest to Celestia dick!

And the twin watermelons hanging off her chest! She cupped them both, silently amazed at how big, how hefty her new endowments were. And how good it felt to grope them. She sighed in pleasure as one hand drooped down to her new cock, while the other continued playing upstairs. They were so... so huge! She always did like them big, and had told Silver Spoon so as often as she could, but these felt almost like-

"Diiiiaaamooooond!"

-like udders.

The door to the stall - she was in a stall, she realized now - swung open. "Well, well, good to see you up and about this early!" Silver grinned widely, her voice thick with an exaggerated country twang. She had returned to her normal proportions - smaller than Tiara in every way. She was wearing a wide-brimmed straw hat, a set of loose-fitting denim overalls, and (as far as Tiara could tell) nothing else. "That's good! 's time." She hefted a bundle of rope and faux-leather strips, tossing it to Tiara. "C'mon, get up, time to put on your harness and move y'all to the milkin' machines!"

"-M-milking machines?-" Diamond sputtered. "You can't be serious, Silver! Acting like I'm some kind of... some kind of cow! How is that hot?" But as her mouth protested, her body obediently waddled its way over to a waiting Silver.

"Ridiculous!" she said as she wiggled herself into the harness, her enormous, udderlike tits jiggling and swaying enticingly as they waited for Master to strap everything on. Now that she thought about it, they did feel awful full with... with cream, she supposed. As did her swollen pink balls, positively sloshing over with seed. "This is why I don't let you take charge more often, Master."

"Hold yerself still," Silver responded in her clearly fake drawl, completely ignoring Tiara's complaints. She fiddled with the thick straps as she wrapped them around the cowpony. They covered Diamond’s whole body - like some kind of bondage gear. Starting from a thick collar around her neck, it plunged down her front, splitting into four straps that looped around and under her breasts, before returning into one that trailed down to split again at her crotch, encircling the base of her cock before looping under the cleft of her hefty balls and into her asscrack like a thong, and then finally coming out up her back all the way to her neck where it terminated by rejoining the collar. Silver grabbed Tiara's hands roughly and held them behind her back, wrapping them tightly with more leather straps atatched to the one that ran up her back. Atatched to the front of the collar was a thick, heavy rope that Silver picked up. "And none 'a your nonsense. I don't wanna hear any complaints. Y'all remember what happened the -last- time I let you skip mornin' milkin' time."

"No!" Diamond gasped, suddenly remembering the last time Master had let her skip morning milking. Oh, she'd felt so full and on edge she'd thought she would burst! She shivered in her restraints, heavy tits wobbling to and fro. "Fine! Whatever, Master. You can be in charge... for now."

Oh, but when this was over, Silver would pay. How dare she try and... try and domesticate her like this! Why, if it wasn't for the promise of that sweet, heavenly milking, and Master's sure, strong hands on her aching, overfull tits, and her throbbing, needy cock she'd be showing Master who was boss already!

Silver hefted the rope, gently but firmly leading Tiara out of her stall. "Now, today we're gonna be tryin' somethin' a little different," she said in her drawl, taking Tiara out of the barn. "See, yer production's been goin' up lately. A lot. Yesterday, you made so much milk that I just couldn't do it by hand without losin' a lotta the product. At five milkin' sessions a day, that's a lotta money we're losin' out on." Tiara noticed that she was being led to a very large metal warehouse, easily twice the size of her barn, that she could swear hadn't been there the day before. "So today I ain't gonna be milkin' you by hand. Instead, we're gonna be tryin' out our brand new milkin' machine."

"A new one?" Diamond thought back briefly to the last milking machine Master had tried her out on: a sad little piece of equipment that could barely drain her faster than she could produce. Was that the sort of thing Silver was going to try again? She snickered, even as she followed obediently at Silver's tug. That was why she'd win this contest of theirs, in the end. She was the big, productive, milky cow, and Master was a loving little farmer who always thought too small.

Though, Diamond had to admit when she saw the new machine, Master wasn't completely clueless. The new machine was a mass of straps, pipes and pumps, leading into dual rows of towering steel vats - one for her milky knockers, and the other for her endlessly productive balls. Each vat was bigger than Diamond's own stable, and the milking barn itself was nearly the size of a city on the inside. Diamond gulped, squirming awkwardly in her harness. Had all this always been so... big?

"Eeeyup. Brand new, state-of-the-art. Just came in yesterday. Accordin' to the brochure, they can take pretty much anythin' you can throw at 'em." Silver had, at some point, slipped a long strand of straw into her mouth, and was chewing and sucking on it idly. "Supposed to be real gentle, too. No risk of hurtin' the cow. Now, come on, girl, it's time to get y'all strapped in for a nice milkin'." Silver led Tiara to one of the vats. In front of it was a long iron bar that extended from one end of the cavernous building to the other, slightly below knee height. At regular intervals along the bar were thick, padded foam covers. "Kneel," Silver ordered.

For a moment, Diamond thought of resisting, but not half a moment later, she remembered how important it was to listen to Master precisely while she was being hooked up. If she didn't listen - or, dare she think it, disobeyed! - during this crucial time, she could be hurt. And she was Master's precious moo-moo. The lifeblood of the whole farm! There was no way she could let herself get injured and disappoint Master for some... petty grudge.

"Hmph!" Diamond grunted, kneeling as told. She would listen for now, especially since everything felt achey and sore - tits full to bursting with milk and balls brimming with rich, gooey cum. She needed the milking, but she vowed to find some way to turn the tables soon enough.

The machine was comfortable at least, filled with suspending straps and padding to make her positioning as easy as possible. Master had clearly spared no expense on this one. She looked at the pumps, the only parts as yet unconnected, then expectantly back at Master. "Well?"

"Good girl," Silver said, lightly tousling Diamond's silky hair. "Now, remember, this bit might feel really good, but I need you to hold yer milk in and try not to cum until all'a the pumps are on. We don't wanna waste anything on premature release. And remember..." She deftly straddled her moo-moo. "...Try not to squirm too much. Makes it a lot less comfy for me~" With that, she sat down on Tiara's immense cow ass, leaning forward until she was parallel to Tiara's torso, her tits, not insignificant (though still barely even a fraction of the size of her moo-moo's), pressed firmly into Tiara's back as her slender arms slowly maneuvered their way around her bulky, feminine form.

She picked up a pair of transparent plastic domes, each just large enough to perfectly contain one of Tiara's big, milky nipples with about an inch and a half of empty space left over for the milk, with a diameter that left about a quarter of an inch of space around her areolas. On top of the domes were long, thick, transparent tubes that rose up and up and up, vanishing into the darkness of the building's impossibly high upper levels, before presumably coming back down to feed the milk into the massive vats. At the base of each dome was soft, slightly sticky padding, designed both for the cow's comfort and to keep the pumps on until the suction was activated. Silver gently placed the cups over Tiara's fat, leaky teats, and then gently but firmly pushed them into her soft, pillowy milksacks. "Remember, girl,” she gently whispered into one of Diamond's ears as she grasped the third pump. “Keep yer milk in 'til I've turned the pumps on."

This pump was much larger than the ones used for her nipples, a good foot of plastic cylinder before it tapered into a dome at the top. Again, the bottom was padded with a black, rubbery soft substance. Enough to envelop her cock down to the medial ring. With her free hand, Silver grasped Diamond's meat at its base, and again, she whispered, "Don't cum yet, girl," before sliding the pump onto her penis. "There we go, girl," she cooed, one hand gently running feminine fingers through Tiara's luxurious mane - the other was still firmly grasping the base of her enormous cock. "That wasn't so bad, now, was it?" Not giving Tiara a chance to respond, her free hand darted to a switch on the side of the vat and flipped it.

And then the machine turned on.

Diamond gasped, wriggling and writhing in her restraints as Master's strong, practiced hands groped at her most sensitive bits. Though Diamond was nearly half again as big as her Master, years of arduous farmwork (and a steady diet of her moo-moo's nutritious milk) had made Silver surprisingly... strong for her size.

Diamond bit her lip, refusing to moan even as the gentle suction of the pump's rubber seal worked its magic on her engorged nipples. Swear to Silver Spoon, she was so pent up right now that even this was nearly enough to get her spilling. Master would certainly be surprised when she found out that her fancy new milking machine was no match for her precious moo-moo. Already the dome over her throbbing cock was filling with cloudy pre, her swelling balls provoked to ever greater excess by Master's teasing touch.

"Hope you didn't spend too much on it, Master," she half-sang as Silver circled over to the switch. Oh, what a surprise it was going to be for her. "I'm only going to break it and make another m-oooh!" Diamond's brain short-circuited as the switch flipped on, the pumps activated, and a rhythmic suck-suck-sucking at her sensitive teats and cock pulled the floodgates wide open.

"You were saying, girl?" Silver couldn't help but smirk, grinding her crotch against Tiara's back. "Just relax. The pumps are on and you can cum all you want now. Here, lemme help y'all with that~" She squeezed the base of Tiara's cock, gently pumping the thick rod of dusky flesh. "Gooooood girl," she purred, bringing her free hand from the switch to one of Diamond's pendulous udders, giving it a gentle rub in small, concentric circles on its side. "Do y’all like that, girl? Are ya’ gonna make lots ‘a high quality milk ‘n cum for Master?"

"Guuuuuh..." A long, lewd, lowing sort of moan escaped from Diamond's lips as the pumps worked their magic. The plastic cylinders filled with gallon upon gallon of heavy cream and gooey cum. And yet, even as the machinery worked at full speed, Diamond's assets seemed not to shrink but to swell. Heavy pink tits, sensing the challenge, filled with more and more milk to replace what was lost. The twin vats before her filled with startling speed as she gushed and gushed, her balls churning with far more cum than a single milking could ever hope to even come close to emptying.

Master's hands were an added delight, a gentle, practiced touch to underscore the relentless sucking sensations of the pumps. It was too much. Too good! Diamond squirmed, bucking against her restraints, trying to escape Master's touch, but if the straps hadn't kept her bound, the toned muscles flexing just beneath Master's shining gray fur could have kept her easily under control.

Everywhere she tried to turn, there was more touching, more milk, more cum, more everything! She tried her best to hang on to the lone scrap of sanity, the desire to beat Master at her own game, but deep down Diamond knew that if it kept on for much longer, this would break her. Then she would be little more than a happy moo-moo endlessly fucking and producing for her Master's pleasure.

"Ah!" She bucked again, the cum vat filling at double speed as the thought filled her head. Oh, but that would be hot...

"I take it y'all're enjoyin' this, then?" Silver grinned, and then her hand darted back to the switch, hovering over it teasingly. "Tell me, how d'y'all feel about takin' our first break here, girl? Give y'all a little rest, chance to calm down a bit before we start the milkin' in earnest?" Her hand inched closer and closer to the switch, before darting slightly away again. "Or maybe we can go on just a li'l longer. See ifn' we can't break y'all a bit~"

"Nnnnnng..." Diamond grunted, summoning up the last of her will. "N-never!" Still, within her luscious pink tits, her swaying, gurgling sack, she could feel oceans of milk and cum brewing. Vast seas of virility and fertility, all of which had to be funneled a gallon at a time into the milking machine. The longer Master left the machine on, the more she'd be subjected to this amazing, mind-blowing torment.

She had to stop and catch her breath, find a way to turn the tables! "B-break, please!" she sputtered. "Break!"

"Break it is!" Silver flicked the switch, turning off the pumps and offering Tiara a temporary break from her torment. She gently ran her fingers through her moo-moo's hair. "Don't want to accidentally break my prize cow, after all~"

Silver rose off of Tiara's back, lifting a leg over the enormous cowpony. "Mnnn, gimme a moment," she stretched, raising her arms above her head and yawning luxuriously. "There, that's better. Got a crick in m' neck there. Here, lemme just get y'all some feed, girl." She turned and pulled on a lever Tiara hadn't noticed earlier. Had it even been there before? Tiara didn't really know for sure, being just a cow. Whatever the case, it caused a large, stainless steel trough filled with her feed, specially formulated by Silver to nourish her precious moo-moo. "You eat up, girl. I'm just gonna grab a drink. Feelin' a mite thirsty."

"Thirsty!" Diamond grumbled, snapping up some feed. "I’m the one who’s been doing all the work." She chewed and swallowed, savoring the taste as it went down. Delicious, delicious feed. The highest quality, with the most nutrition, for maximum productivity. She could feel her udders gurgle appreciatively with every pound of it she downed. "Yes, girls," she murmured. "That's it."

The vats before her were already nearly full, fit to burst if the milking went on any longer. Diamond sniggered. Maybe that was why Master had been feeling thirsty, all of a sudden. She'd have to down an awful lot of the product if she wanted any hope of keeping her milking machine working.

"Better drink up, Master!" she called teasingly as Silver returned with a large silver flagon. "Don't want your brand new machine to overflow before the next round ends!"

"I don't think there's any danger of that, girl," Silver responded absently. She held the flagon underneath a large nozzle set into a small machine in between the two tanks. A complex series of pipes wound out from of the back of the machine, leading to the two almost full tanks. She lifted a lever, and a thick white liquid flowed out. Silver idly held it out, just slightly out of Diamond's range of movement, but close enough that she could smell it. Creamy and musky and rich, topped with a thick, foamy head. She lifted the flagon up, holding it to her own snout and breathing deep the powerfully sexual aroma of the cocktail of cum and milk. "Mmm, y'all've really outdone yourself this time, girl. I might go so far as to declare this the best batch yet. A'course, can't quite say that without givin' it a bit of a taste test~"

Silver threw back the mug, chugging down the rich liquid - though it was so thick and viscous that calling it liquid was hardly accurate. It tasted as overwhelmingly sexual as it smelled, the sweetness and feminine richness of the milk swirling and merging with the musky, slightly bitter virility of the cum. Silver idly grabbed one of her breasts, giving it a gentle squeeze.

It burned on the way down. But it was a good kind of burn. Like a finely aged whiskey.

Silver lowered the flagon, having drained it completely. "Ahhh, yeah. That hits the spot. Gimme just a moment and we'll be ready for round t-" Silver's sentence was interrupted by a loud, angry groaning noise from her stomach. "Ah! There we go."

"Drink up~" Diamond said, watching captivated as Master downed the whole thing. It felt... silly, with her goal to show Master who was really boss, but watching her owner enjoy herself like that was almost a point of pride. She was Master's loving moo-moo, after all, and it was only right that Master should drink her moo-moo's milk to grow big and strong. Not to mention that it was a bit of a turn on, little droplets of the thick, sticky concoction spilling as Silver guzzled it greedily, soaking into her fur, staining her overalls with the products of Diamond's own lusts. The whole sight was nearly enough to make Diamond hard by itself.

But, as Diamond watched, she couldn't help noticing something awful strange. Master had always insisted on wearing overalls just a bit too big for her, and little else besides, but nearly halfway through her drink, her overalls looked almost like they... fit. A rubbery, stretching sound filled the barn as inch by inch, gulp by gulp, Master grew upward and outward. Big, gray-furred tits began to strain against her milk-and-cum-drenched overalls, the outlines of healthy pink nipples peeking up over the dark blue denim. Already, it looked like Master was nearly as big as Diamond herself, and she wasn't even finished.

"H-hey!" Diamond tried to object. When she wanted Master to grow big and strong drinking her milk, she hadn't meant it quite so literally! Then a metallic, creaking sound caught her attention. Diamond's jaw dropped as she looked back to the vats, only half full of milk and cum... if that! But how? Vats didn't just suddenly double in size!

"Mm!" Master smacked her lips loudly, drawing Diamond's attention again. Vats weren't supposed to double in size... but then, neither were Masters. Silver looked almost ten feet tall, her thick, muscular body bulging out of her shredded overalls at every possible seam. "So tasty! Such a good little moo-moo, making such delicious milk for Master~" She sighed. "I think I might have another!"

"Hey!" Diamond shouted, rustling to break free of her restraints. No way was she going to let her little Master get bigger than her! "No fair! I should get a drink, too!"

"Silly moo-moo. Dairy cows don't get to sample their own product. Still, I suppose you have been a very good girl today." She smirked, striding over to the milk dispenser in significantly fewer steps than it had taken to get there. What little was left of her clothing strained against her bulging musculature and enormous frame. Her straw hat, previously oversized, now looked almost comically small on her head. "Tell y'all what. I'll give ya' a lil' free sample. As a reward for makin' so much milk 'n cum for your master."

Silver produced another lever that Tiara hadn't noticed before, giving it a good hard yank. The stainless steel food trough retracted up into the dark ceiling, being immediately replaced by another, identical trough - this one empty of feed. There was a chute, leading to the trough from just underneath the cream dispensing nozzle. "Here ya' go, girl." Silver lifted the lever that had dispensed the cream once more, a small amount of Tiara's fluids flowing its way down to the trough. "Drink up. Y'all've earned it~"

"Yes!" Diamond almost squealed with glee, greedily dipping her muzzle into the trough. Silly Master! Letting her get a trough-full of warm, creamy milk all to herself. And it was delicious, too. Tingly and warm and filling, like liquid sex... which she supposed it was. She'd been bigger than Master to start and this was far more than Master had gotten with her first taste. Master might've had a little growth spurt, but she was about to get fuckin' huge.

And she could already feel it! A pleasurable, blooming feeling in her tits, in her balls. The same rubbery stretching sound that had filled the barn when Master had grown. "Ooh~" Diamond moaned, only barely pausing in slurping up even more. This was going to be big. She was going to get titanic, big enough to break right out of her straps and show Master who was really in charge on this farm.

Except... as the minutes passed Diamond noticed her perspective wasn't inching any higher upwards. Her tits felt heavier, yes, and fuller, but where was the muscle? The size? Even the straps of the milking machine seemed to be stretching easily to accommodate her new proportions. She groaned as she felt her udders brew up a hot batch of fresh milk and her balls churn with fresh cum. By Silver, they felt so full now. But she didn't want to feel full, she wanted to feel huge! What the hay was going on here?

"How's it taste, girl?" Silver shouted jovially, giving Tiara a good firm smack to her backside, sending delicious ripples of motion through her enormous bovine ass with the force. "Now, I believe I was about t' get myself some seconds." She grinned, licking her lips hungrily. "But first," she hefted the flagon. It had, initially, been fairly large, but now, after her growth spurt, it was hardly as impressive. "This is hardly adequate, don't y'all think? One moment." She pulled the lever again, giving Tiara another trough full of cream. "Why don't y'all have another helping while I go get m'self a bigger glass." Without giving the cowpony a chance to respond, she turned and left once more.

"H-hey!" Diamond shouted. But it was pointless to struggle now. Even if she did have the strength to break free of her restraints, her 'assets' had swollen to nearly double size. Deliciously pleasurable and full, but not that easy to move around. "I'll show her..." she grumbled, turning back to the trough. Maybe she simply hadn't drank enough of her output yet. Perhaps her billowing bust and balls were only the first stage of a massive growth spurt for the rest of her! She dug back in greedily, slurping up as much milk and cum as her greedy muzzle could take in. "Have to get big. Have to get huge!"

Silver returned a few minutes later, with an enormous metal barrel hefted over her shoulder. "Here we go. 's a bit big right now, but I'm sure I'll grow into it. How're y'all doin, girl?" Silver didn't stop to allow Tiara to answer, pulling a lever that caused the chute to retract, and placing the barrel under the cream dispenser. "I figure half full for now's good. We'll see where we can go from there."

"Doesn't matter," Diamond said to herself, in between mouthfuls of sticky, gooey cream. "Gotta get bigger. Gotta outgrow Master!" And, in a way, she certainly was outgrowing Master. The straps creaked and strained as bubblegum pink titflesh ballooned outward, the fuzzy sack of her scrotum not far behind. Puddles of dribbling milk and oozing precum spread across the barn's floor as Diamond's assets responded appreciatively to their growth. Still Diamond continued to drink, determined to believe that the rest of her growth would follow suit soon enough. Devoted to the belief that her drinking would grow her into a fucking goddess, bigger and better than Master could ever be... and not an ever more productive moo-moo, filled with even more milk and cum to further fuel Master's own ascension.

"Good girl! Y'all're just about ready for round two to begin!" She hefted the barrel, half full of Tiara's cumulative fluids, before pausing. "In fact..." Her hand darted out to the switch, once again turning on the milking machine. "Let's have a race. See ifn' you can fill these tanks faster'n I can make 'em bigger~"

"Faster than you can… what?" Diamond barely had time to finish the thought before the pumps switched on again and her brain shut down. Her eyes rolled back into her head and a long, throaty moan escaped her as the pumps suckles eagerly at her thrice-sized udders. Tits and balls both had grown fat off the products of her last milking, and now they were paying it back several times over... with still more to come. Diamond's open, lolling mouth easily took in quarts of creamy goo as the fresh production leaked back into her trough. Rubbery, stretching sounds echoed through the barn as Diamond's assets bloated still bigger, the double-sized vats filling at ever greater speeds.

"Oooh, confident, are we?" Silver grinned. "Well, I guess I'd best take this seriously then." She hefted the barrel - absolutely enormous, even relative to her increased size - and brought it to her lips. "Bottoms up!"

The barrel's shape made it difficult, bordering on impossible, to actually get all the liquid into her mouth. Twin streams of white liquid ran down the sides of her face, soaking her fur and what was left of her overalls with milk and cum. Her throat undulated rhythmically as she drank deep, savouring the sweet flavor of Tiara's product.

Her stomach once again made that loud, wet noise, and then came that same rubbery groan as Silver grew. Her overalls, already stressed to the limits, violently exploded as her body surged bigger and bigger. Her pace picked up by the sheer virtue of the barrel's relative size slowly diminishing - the bigger she got, the smaller it was, the faster she drank and grew. The time it took her to go from ten feet to eleven was the time it took her to go from eleven to fifteen, and from fifteen to twenty before she finally finished her barrelful, tossing the empty container aside like an empty soda can. And, all the while, there was a metallic grinding sound as the tanks creaked and groaned their way larger and larger and larger right along with Silver.

"Mmmm, more," she groaned. With one hand firmly massaging one of her enormous grey-furred breasts, she reached down and grabbed the nozzle. "More!" she shouted, violently ripping it off entirely, unleashing a high pressure spray of milk and cum. "MORE!" She silenced herself, shoving her mouth over the spray.

And more she would get. Diamond's orgasm redoubled at the sight of Silver bursting through the last shreds of her overalls, the vats filling with a healthy helping of milk and cum even as they creaked their way to the size of whole city blocks. She moaned, bubbles rising from the trough as she continued gulping down as much as her throat could manage. This was her purpose, she realized. Not to outgrow Master, but to help her grow. To be the fattest, most productive moo-moo there ever was so that Master could grow, and grow, and grow! It was her job to make Master grow big and strong, to make her a goddess over not just the farm, but the world, the galaxy, the universe. The impossibly large vats nearly spilled over with a surge of milk as Diamond imagined the whole planet cradled between Master's perfect tits, caring for all her worshippers just as she cared for her favorite moo-moo.

And her ascension was progressing faster than ever. Silver looked in total ecstasy, one hand buried between her thighs while the other worked to stabilize the high-pressure hose. Dozens of gallons of the delicious, nutritious milk-cum mixture poured down her throat, giving her nearly a belly before her growth kicked in. Lustrous gray fur shone perfectly in the light, her ever-expanding body soaked in the excess of Diamond's output. Silver was outpacing even the vats now, her long, toned legs straddling ever more of the massive container as she rose heavenward. Her eyes were locked thirstily on the vat's nearly overfull brim, counting down the seconds until the hose would no longer be enough to sate her…

Twenty became forty became eighty and beyond. Silver groaned and moaned around the hose, which also grew along with her - though it was only barely managing to keep up. Silver frowned as she passed one hundred feet - she was so big that even its output wasn't quite able to keep up with her raw size. "Well," she cooed, "I can see a way to fix that~" She stood, her body so vast that Tiara was barely the size of one of her toes. The milk tanks reached just below her waist, still creaking and groaning and growing at a much slower rate than Silver. She grinned, and then placed her hands on both sides of the massive metal cylinders. She licked her lips as the metal creaking sound changed. It was louder, more insistent. The tank - had it always just been the one tank? Tiara could have sworn there were two separate tanks, but it was so hard to think about things that weren't helping to make Master huge - slowly began to tear away from the base. "Hup!" There was a loud, ear-piercing screech of metal tearing as suddenly Silver lifted the vat to her lips. "Bottom's up!"

Thunderous gulping sounds filled the barn as a waterfall of liquid sex flowed down Silver's throat, her belly ballooning outward as it filled with enough milky cum to flood Manehattan. "Ah!" Silver sighed as she let the now empty vat drop with a heavy crash. A thick, corded arm rose up to wipe away her milk mustache. "Now that right there hit the spot!" She hiccuped, her giggles rumbling deeper and deeper as she shot up nearly half again her tremendous height. "Every growing mare needs her milk, after all!"

Diamond only groaned as a titanic hand scooped its way under her, freeing her from the milking machine with a booming -pop!- "Such a good moo-moo," Master said, raising her up. Though she was more breast than mare at this point, Diamond couldn't help but notice that even one of Master's perfect, pendulous tits far outclassed her... and beyond, as another growth spurt rumbled through Silver's body. From the size of Master's bloated belly, she was bound to get far bigger still.

"Y'all have earned a rest," Master said, slipping Diamond into her cavernous cleavage. The earthshaking rumble of her heartbeat reverberated pleasantly through Diamond's body - a nice little reward for doing so much to make Master grow. "You just stick in there and get comfy, so Master can find you later on." Silver licked her lips as she grew again and the masses of warm gray flesh cradling her moo-moo tripled again in size. "Never know when she's going to want another drink straight from the tap!"

"Always," Diamond murmured, feeling exhausted all of a sudden. Making so much milk and cum made any cow-pony tired, and she'd have to get plenty of rest so she could make her goddess even bigger. As the titanic Silver stepped out of the barn and into a world far, far smaller than she was, Diamond shut her eyes and dreamed contentedly of Master.