The Big Second Date

by MassDriver

Rating: mature
Tags: Applejack, Original Character, Rainbow Dash, Equestria Girls, Sex
Length: 38352

After growing into giants, Rainbow Dash and her boyfriend have received an antidote that returns them to normal size. But they'll grow again if they have sex... and avoiding each other might just be impossible.

Last night, Rainbow Dash and her new boyfriend Oval Office fucked and grew into horny, destructive giants. Twilight produced an antidote that returned them to normal size, but when they start to fool around... they start growing all over again.

Now they have to avoid each other until a permanent cure can be created. But they're crazy for each other, and their growth has left them with tall, sexy bodies. Having sex will turn them into giants again, and they don't want that...

...Except that they really, really do.

Contains: Giantess / Giant, Growth.

This story was a commission! If you want one of your own, see my commission policy and prices here. I can also be reached at massdriver77 {at} gmail {dot} com, or on Discord at MassDriver#3858.

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All characters are over 18.

Cover art is derpibooru 1329140, used without permission.

Published 2017-11-25 00:30:06 UTC
Last updated 2018-08-28 23:05:09 UTC

Chapter 2

“Okay, so - just so we’re all in agreement,” said Rainbow Dash, still sitting on Oval Office’s softening cock, “Not my fault, right? And not Oval’s fault?”

“Oh! Yes! Of course!” shouted Rarity. “Our first priority must be to ensure that Rainbow Dash feels no guilt for the destruction of my family’s property!”

“Rarity, I’m really sorry,” said Sunset, pinching the bridge of her nose. “You had nothing to do with this, and you still offered up your lake house…”

“No, no,” sighed Rarity. “We have all stood together throughout our magical misadventures, accepting risks on each others’ behalf. If I’m willing to risk my life fighting evil, risking mere property is comparatively trivial.” She leaned against her car and slid down to the ground. “Plus, it’s insured.”

“Anyway,” said Sunset, “I don’t blame you, Dash. I was pretty sure the cure would work this time.”

“Me too!” said Twilight Sparkle. “Magic is tricky to work with… so much potential, but so finicky…”

“And you’re a natural,” said Sunset. “But this is a world with no magical libraries, and I’m not the most skilled tutor… it’s only natural that we’d make some mistakes.”

“Great! So no one has to feel bad,” said Rainbow Dash. “And that’s awesome, because I feel great. I just fucked my big, sexy boyfriend after a few days of being really fuckin’ horny.” She sighed happily, grasping her giant round tits. “Such a fuckin’ release.”

“So can you fix this?” asked Oval Office. Rainbow Dash lifted herself off of him, and he gasped as his cock slid out of her.

“Honestly?” said Sunset, throwing her arms to her sides. “I’m really, really not sure at this point. The magic swirling around in your body is a mess. We’ve got spells on top of spells, all tangled up. Maybe it’s time to call Twilight.”

“I really wanted to get this right,” sighed Twilight. “But yeah, I think we need to call in the magic princess for this one. Do you have the magic book?”

“Yeah, I usually keep it with me,” said Sunset. “As for you two,” she said, pointing at Dash and Oval, “No more fucking til we figure this out. Obviously. Think you got it out of your system?”

“Sure,” said Rainbow Dash. “I mean, if you told me it was safe to ride Oval’s cock again, I’d definitely be up for it, like, right now. But if it’s not, then I’m good.”

“Well, good,” said Sunset. She opened the trunk of her car and retrieved the magic book she used to communicate with Twilight Sparkle, flipping it open to the first empty page. She put pen to paper and started writing… then frowned.

“Well shit,” she said. “Not only are we in a cell service dead zone, I’m not getting any reception on this thing either.” Sunset closed the book. “We may just be too far from the portal. Urgh, might just have to drive back to Canterlot High… I guess we may as well, since we’ll want to meet Princess Twilight as soon as she leaves the portal.”

“What about us?” asked Oval Office. “Should Rainbow Dash and I just stay here?”

“Yeah, I’ll bring the Twilights back here once we have something figured out,” said Sunset. “Unfortunately there’s no way to stay in touch with you, but as long as you keep a low profile and don’t fuck, I think we’ll be fine. What about you, girls?” She turned to the girls who had come in the other car - Fluttershy, Rarity, Pinkie Pie, and Applejack. “The house is pretty smashed up - again, sorry, Rarity - so are you planning on sticking around?”

“Well, our driver is still asleep in the backseat,” said Rarity, tapping on the windows of Applejack’s car. “After getting no sleep last night, she was apparently so tired that she decided to sleep in her car rather than walk ten yards to the lake house. Not to mention, she somehow managed to sleep through Dash and Oval’s growth.”

“Yeah, and she wasn’t doing a great job staying awake on the drive over,” said Rainbow Dash. “If it were up to me, I’d let her sleep.”

“Well, if you promise to keep your distance from it, I suppose Fluttershy, Pinkie and I can still use what’s left of the house.”

“Just keep an eye on the lovebirds,” said Sunset - and then she and Twilight climbed back into her car, backed down the driveway, and drove off through the trees. The other girls made their way into the house, leaving Rainbow and Oval basically alone.

Oval had been lying flat beneath Rainbow Dash when they’d been fucking, and he’d stayed prone since then, lying with trees flattened beneath his back and the lake’s water lapping at his toned blue bottom. He was surprisingly comfortable there - the rough bark and cool water would have been uncomfortable for a normal person to lie on, but Oval’s five-hundred-foot body was perfectly cozy - especially with Rainbow Dash curling up beside him.

“Is it just me, Oval,” said Rainbow Dash, draping her arm across his chest, “Or was that totally worth it?”

Oval just laughed.

“I mean it, though,” said Rainbow Dash. “I mean, I didn’t want to break Rarity’s house. That sucked. And I didn’t want to disappoint Applejack. But getting big with you just feels so damn good. Part of me hopes Sunset and Twilight and Twilight find a way to fix this, but part of me just wants to grow with you forever…”

Her finger was moving in circles on Oval’s chest, tracing the outlines of his musculature. Just days ago, his body had been nothing special, at least in his own estimation. But the same magic that had made Rainbow Dash into a curvaceous Amazon had made Oval into an adonis, with handsomely proportioned and perfectly toned muscle all along his body. Rainbow Dash had been crushing on him long before he’d become buff, but she certainly didn’t mind having a boyfriend with washboard abs.

“I feel the same way,” said Oval. “I don’t want to disappoint anybody either, but growing with you feels better than anything. I just wish there was a way to keep this, but not… cause trouble for everyone.”

“I kinda like the part where we cause trouble,” whispered Rainbow Dash. “I mean, not hurting anyone, but… like, being big enough to do anything we want and too strong for anyone to stop us? That’s what I want for us, babe. Settling for anything less just feels lame now.”

Her fingers were making their way lower and lower, creeping down past his abs until they nearly touched his long, flaccid cock. “Oval, when we were fucking, we let ourselves fantasize about the lives we really wanted. We thought we were ‘cured’... we thought we weren’t going to grow anymore. But weren’t those fantasies fucking hot? These past few days when we didn’t fuck, didn’t you spend those days obsessed with the idea of growing bigger? I sure fuckin’ did…”

Her fingers finally reached the base of Oval’s cock, and her fingertips stroked up and down its length. Even soft, it was longer than the lake house was tall, and its whole length began to thicken and grow stiff at Dash’s touch.

“Most people don’t get to live out their fantasies, Oval,” said Rainbow Dash. “But we do. I know you want this just as much as I do, baby. Just let me make you big…”

Oval gasped as Rainbow Dash’s fingers wrapped around his shaft and began to stroke - but he didn’t try to squirm out of her grip. “Dash, just a minute ago we were talking to Sunset… promising not to do this again…”

“I don’t remember saying I promised,” said Dash. “And I don’t think you said anything. So why don’t I start by making you big? I’ll make this big beautiful cock cum, and you’ll get huge…”

“Dash, we really shouldn’t… we’ve been through this already…”

“Aw, you’re always the responsible one, aren’t you, Oval?” said Rainbow Dash. Her hand was gliding up and down his cock as it rose higher and higher; it was still slick from their last fuck, making her handjob easy and smooth. “You’re so smart and responsible… that’s why you deserve to be a big, sexy giant. I don’t even mind if you get bigger than me, dude… How about I jerk you off till you’re ten times my size? Then if I cause too much trouble, you can just pick me up and set me on your big fat cock…”

Oval Office could have kept protesting, but there was no point keeping up the pretense. His new, bigger body was immensely strong, but its needs were just as powerful, and Oval’s self-control hadn’t grown along with it. Having his cock stroked filled his body with more pleasure than he’d ever felt as a normal-sized guy. Resisting temptation had been nearly impossible over the last few days, and now that he was even bigger, he had no hope of fighting back against it.

“Ohh, Dashie, I gotta cum,” moaned Oval Office. “Make me bigger…”

“Yeah, that’s the spirit,” said Rainbow Dash. “Now that we’re on the same page, I’m gonna upgrade this handjob to a BJ.”

Rainbow Dash picked herself up and lowered her tits onto Oval Office’s crotch, sliding his cock into her cleavage. Dash’s breasts were bigger than her head, big enough that a cock of average proportions would be totally swallowed up by her cleavage. But Oval Office’s cock was a hundred feet long, big enough that the tip poked out from within. Dash opened her pale blue lips, salivating with desire, and wrapped them around the fat, slick tip.

Oval sucked in a breath as Dash began to lick at his cock. The head of his dick was bigger than his whole body had been ten minutes ago, and there was a whole body’s worth of pleasure concentrated in that bulbous tip.

And Dash’s tongue was attacking the head of his cock, lapping up the taste of her own pussy and Oval’s spilled cum. She moaned in pleasure as she sucked, feeling the heat in her cunt grow rapidly stronger. Being huge was having the same effect on her as it was on Oval; her arousal grew quickly, and it grew far more powerful than would have been possible in her normal-sized body. For a normal Dash, sucking Oval’s cock would be a turn-on… but as a giantess, she found the experience rapturous, so pleasurable that she could have cum just from having his dick in her mouth. If she let her fingers creep down to her slit, she could make herself cum in a matter of seconds… but she wanted to watch Oval grow first.

“Dash,” whispered Oval, “Your tits are so soft… mmph, make me cum, I wanna get bigger…”

Oval’s legs kicked in the lake, raising waves big enough to capsize a boat. He steadied himself against the ground, digging his palms deep into the ground where his body had flattened the trees. He wasn’t screaming or crying out… but at his size even his gasps and groans were loud enough to shake the walls of the lake house.

Rarity had collected the girls in a bedroom with no windows facing the lake, insisting that Rainbow Dash and Oval Office should have their privacy. This was a mannerly decision, but not a very practical one; had they been keeping an eye on the giant lovers, they would have realized they were getting frisky. And although Rarity, Fluttershy, and Pinkie Pie hadn’t witnessed Oval and Dash’s destructive growth firsthand, they had an idea of how serious the situation was.

When the noises from outside became impossible to ignore, the girls ran to the deck behind the house. The sight that confronted them - two five-hundred-foot giants with perfect, beautiful bodies - stopped them in their tracks. For a moment they simply watched Rainbow Dash squeezing her house-sized tits around Oval Office’s towering cock, sucking greedily at the tip.

But when Oval Office groaned and arched his back, they snapped out of their reverie. If he came, he was going to get bigger - and unfortunately, none of the three of them stood much chance of putting a stop to it. But there was someone nearby who might stand a chance...

“Oh dear,” muttered Rarity. “I had hoped to let Applejack sleep longer than this.”

“Mmph, Dash, I’m close…” moaned Oval Office. Dash mumbled in approval and lowered her head, taking his cock deeper in her mouth. With most of his shaft sandwiched between her tits, she wasn’t able to take his cock deep in her mouth, but she was able to give his tip the full attention of her lips and tongue. She swirled her tongue around his tip, lapping up the gallons of pre that pumped up from his slit.

Oval felt his balls tighten - but that wasn’t the only thing his balls were feeling. Little hands were gripping the taut skin, climbing higher… someone was ascending his ballsack. He looked down at his body, trying to see who it was - but all he could see was Rainbow Dash going to town on his cock, her lips wrapped around the tip while her tits swallowed up the shaft. Whatever was happening on his ballsack, he had no way of seeing it.

Meanwhile, Applejack was regretting her decision to climb up this particular feature of Oval’s anatomy. The farmgirl tended to prefer the direct approach, and that had been the reasoning behind her choice: if she wanted to stop him from coming, then his dick and balls seemed like the place to start. Honestly, the head would have been a better choice - if she could reach his ears, she could reason with him - but his balls were about two hundred feet closer to the lake house than his ears.

Now that she was here, though, she wasn’t sure what to do. Punch his balls? Squeeze in between Dash’s tits and try to climb his cock? There was no obvious solution, and - judging by the growing volume of Oval’s moans - very little time to act.

And on top of that, it was pretty demoralizing to be standing on the giant ballsack of the boy she’d been crushing on a few days ago, watching his equally giant girlfriend give him an absolutely colossal blowjob.

Of course, Rainbow Dash had won him fair and square. Applejack had agreed to that. And Applejack was more emotionally mature than most girls her age - but feelings don’t just go away because a mature person made an agreement. She still admired Oval Office - and while climbing his huge blue ballsack wasn’t exactly romantic, it was a reminder of what she’d lost out on when he picked Rainbow Dash.

And seeing them grow again stirred up feelings of jealousy. Of course Applejack felt terrible about her role in the destructive three-way they’d had… but it had also been so fucking hot. Applejack couldn’t help but imagine herself sucking Oval’s eighty-foot-long cock, giving him the orgasm that would make him even bigger…

She felt her panties getting damp as arousal warmed her magically-enhanced body. She’d been imbued with the same magic as Dash and Oval, and while it wasn’t making her grow anymore, it did give her a body that was highly sensitive. Being this close to a giant act of lovemaking was lighting a fire in her cunt that was hard to ignore.

Grumbling, Applejack shoved her way into Rainbow Dash’s cleavage and began to ascend Oval’s cock. Dash’s tits were still holding his shaft tight, enclosing Applejack within suffocating walls of pillowy flesh. It was hot, and wet, and filled with the mingled musk of Dash and Oval. Oval’s cock had recently been balls-deep inside Rainbow Dash’s pussy, and the smell of her was all over him…

There was a lot of dick for Applejack to climb, but her dose of growth had left her with a peak human physique - and soon enough she emerged from the top of Rainbow Dash’s cleavage, into the shadow of her enormous head. Dash was still sucking, her plump blue lips working their way up and down the head of Oval’s massive cock. Her eyes were shut tight, and she’d seemingly taken no notice of Applejack yet; both giants were too absorbed in each other to pay attention to someone of normal size.

Applejack, clinging to Oval’s dick, began to yell out, hoping that her voice would reach Rainbow Dash’s ears over the sound of moaning and sucking. But as she yelled, the shaft she clung to began to throb - and Applejack realized she was too late.

Between school and farm work, Applejack didn’t have tons of time to devote to the rodeo. But she had rode the occasional bucking bronco, and Oval Office’s twitching cock had a lot in common with that experience. She clung to the underside of his shaft, clutching at the cumvein as gallons of spunk began to pump through it… and her grip nearly faltered as the shaft she clung to began to grow.

Oval, meanwhile, was groaning helplessly as his cock pumped and his body grew. He could feel a little body ascending his cock, and he even correctly guessed that it was Applejack. She had been the one intervening in his and Dash’s attempts to get close over the last few days, so she seemed like the most likely to be doing it now.

Applejack’s presence was a reminder that he really shouldn’t be letting himself grow again. But her tiny hands on his eighty-foot cock were both a source of physical stimulation and a reminder of just how big his body was. If anything, she’d made him cum more quickly.

Rainbow Dash felt Oval’s cock throb in her mouth, and the first gush of cum hit her mouth, splashing her tongue with gallons of thick, hot spunk. She squeezed her tits rhythmically, milking his spasming shaft and swallowing up each fresh splatter of jizz.

A sudden naughty whim made Rainbow Dash raise her head and release Oval’s cock from her mouth. Oval’s dick shot a jet of cum straight up… and then it fell back down, landing on top of Dash’s tits.

And it splattered Applejack as well, coating her body a thick glaze of cum. Grumbling, seeking higher ground, Applejack climbed the rest of the way up Oval’s dick, draping her cum-soaked body over the twitching, spongy tip as it grew bigger and rose higher.

“Holy shit,” said Rainbow Dash, finally taking notice of Applejack. “AJ, are you trying to butt in? No hard feelings, babe, but Oval is mine. He’s too big for a girl like you… and I can feel him getting bigger… She squeezed her tits around Oval’s cock, feeling it grow thicker between them. “Can feel that. Oval? You’re growing again. I wanna see my man get really big…”

Oval Office was, by now, familiar with the feeling of growth - but like the feeling of orgasm, there was no way to get totally accustomed to it. It overwhelmed his senses, lighting up every nerve with pleasure. “Yeah,” he gasped, his cock still firing ropes of cum into the air, “I’m gonna grow for you, Dash, I’m gonna get big…”

He felt his legs growing longer, pushing their way past the edge of the lake. His arms spread wider, flattering more trees near the lake’s edge. His big blue body, tall and strong and completely nude, expanded over the landscape, making the earth rumble. And all the while, his cock was still shooting, firing off more and more spunk as his body grew larger.

Applejack, her body still glazed with cum and draped across the head of Oval’s cock, watched cum shoot like a geyser from his slit. His dick was growing taller and wider beneath her; it was big enough that she could have stood up on it, if it had been holding still… and if it wasn’t so high up. His cock was over a hundred feet tall by this point, and Applejack didn’t want to risk falling.

Oval Office still wasn’t used to giant-sized orgasms. They seemed to go on forever, pumping immense volumes of cum from his expanding nuts as his body grew larger - but in time, of course, this one came to and end. The last few weak spurts of cum washed over Applejack, drenching her in a fresh coat of spunk.

“Oh my God,” moaned Oval Office, his chest rising and falling with breaths that shook the ground around him. “Ohhh, Dash, that was great… it feels so good to grow with you.”

“Heh,” chuckled Rainbow Dash. “I wasn’t growing this time… but watching you grow made me horny as hell, dude. This fuckin’ cock of yours, dude, it’s huge. And I’m not the only one who likes a giant cock. Looks like you got a passenger here!” She plucked Applejack from the tip of Oval’s cock and held her where he could see. “Applejack just couldn’t stay away. I’d be jealous if I wasn’t way, way bigger than her.”

“Oh hey, Applejack,” said Oval. “Hey, sorry about getting big again… and about cumming on you, I guess.” He didn’t say so, but it was pretty damn hot to see Applejack, smaller than a mouse, clinging to the tip of his dick.

“Yeah, you got her real sticky,” said Rainbow Dash. “Mmm, I’m not letting that tasty cum go to waste… let me clean you up, AJ.” She lifted Applejack to her open mouth dragged her tongue across the smaller girl’s body, licking Oval Office’s jizz from her soaked clothes. “Oval, you make some tasty spunk… and you make a lot of it. Wanna get bigger?”

“Dangit, Dash!” yelled Applejack in a furious, full-throated bellow. “You gotta stop this! You know this is just gonna end up like before! You feel good about this, Dash? Corruptin’ Oval Office, makin’ him all big an’ destructive?”

“Oh, come on,” scoffed Rainbow Dash. “You think I’m corrupting him? He wants to grow, AJ. Don’t you remember what it feels like? Don’t you remember the feeling of getting bigger and bigger and still wanting more?”

“Yer just gonna end up smashin’ buildings again, an’ you know that ain’t cool, Dash-”

“Are you sure it’s not cool?” said Rainbow Dash, giving Applejack a grin that was very wide. “Because I remember how fun it was to get big in the city, and I think it’s super cool. In fact, once we’re a little bigger I think I might want to hit the town again…” She extended the arm that held Applejack, dangling her over the water. “Thanks for the suggestion, AJ! But Oval and I need some alone time, K?”

She released Applejack, letting her fall into the lake, and turned to Oval Office. “Sorry about that, dude,” she said. “Holy shit, did you ever get big…” She grasped the base of his cock - now so thick that she couldn’t get her fingers all the way around it - and gazed out over his body. “Fuck, you gotta be twice my size,” said Dash. “This is actually fuckin’ great, you know? Having a boyfriend twice my size with a giant dick? But… fuck, I like being bigger than you, too… and being the same size has some obvious fuckin’ advantages too…” She released his dick and crawled onto his body, sprawling herself across his bare chest. “So now that you’re so much bigger and stronger than me… what do you want to do to me?”

Oval looked down at Rainbow Dash, who was using his muscular chest as a very firm mattress. She was about half his size now, as she’d said - which put him at about a thousand feet tall. And having a body so big that his girlfriend could stretch out on his chest was pretty cool… but right now the hottest thing he could imagine would be to see Rainbow Dash grow. “I think I know what I wanna do to you, Dash,” he said.

He picked up Dash with both hands, easily lifting her from his chest, and sat up. “Ooh,” said Dash, kicking her feet as Oval dangled her in midair, “Where are you taking me, big guy?”

He hadn’t planned to take her far, at least not by the standards of a thousand-foot-tall giant. There was a nearby mountain, just a few giant paces away, that looked like it would be comfortable to lean against - so Oval carried Dash to the foot of the mountain and sat his big blue ass down. He felt trees flattening under his butt, crushed to splinters by his weight, but the rough surface beneath was perfectly comfortable thanks to his enlarged body’s thick, durable skin. And the rocky, rocky side of the mountain was likewise comfy as he leaned his back against it; it seemed like a thousand-foot-tall giant could sit wherever he wanted.

He lifted Dash up until her crotch was level with his face. She was so small - not as small as Applejack had been, of course, but it was still strange to see her toned body, her wide curves, and her heavy round tits at an uncannily small proportion. He wanted her big, and he knew there was only one way to make that happen.

Oval brought Dash’s hips to his face, pressing her pussy against his closed lips. Dash, already slick from arousal after sucking Oval’s cock and witnessing his growth, sighed blissfully as Oval made contact with her womanhood. And she shuddered, gasping in surprise, as his tongue poked through his lips - and through her lips - to probe the depths of her cunt.

“Oh, fuck, you're big, dude,” groaned Rainbow Dash, her toned blue legs kicking in midair as Oval’s tongue journeyed deeper within her. A double-sized tongue was something marvelous; it was twice as long, twice as thick… it filled her, opening her folds just as wide as his cock had when they'd been fucking…

And as much as she loved his cock, she had to admit that his tongue had something his dick didn't. It was nimble, rising and falling like a wave within her, seeking out sensitive places deep in her cunt.

“Holy shit, holy shit,” groaned Rainbow Dash, “Fuck, Oval, you’re everywhere, you’re touching everything inside me…” She tensed her body, trying to hold herself back, but there was no way to stop what was coming. Oval had zeroed in on a spot that made her legs twitch, and he was attacking it with flicks of his tongue, stroking her clit with his open lips. She shrieked with pleasure, grabbing Oval Office’s shoulders to steady herself as her body shook.

The building tension in her core was accompanied by the now-familiar feeling of growth: a warm tingle, a pleasurable swelling. And when that tension broke, Dash grew in a burst, shooting up a hundred feet at once. And that was just the first wave; each powerful throb hit her with more and more growth.

Oval’s grip on her started to falter as her weight increased. He was strong - certainly strong enough to lift a girl roughly his own size - but it was hard to hold her in midair as she gained mass out of nowhere. As her height approached a thousand feet, Oval Office sat up and laid her down on the forested ground on front of them - and all the while, he kept his tongue in her pussy, licking and flicking at her throbbing walls.

Rainbow Dash wasn’t keeping careful track of how big she was getting; all she knew was that she was growing and it felt fucking amazing. But she could tell that Oval’s tongue was getting smaller inside her; it no longer filled her pussy, nor reached its back wall. And after another thrumming wave of climax and a surge of growth, his tongue started to feel smaller than normal, as if she were outgrowing him.

And Oval could tell for sure that Rainbow Dash was getting bigger than him. Still eating Dash out, he could see her thighs growing bigger on either side of his head, and he focused his attention on her clit, hoping to extend the length of her climax. The more she came, the more she would grow - and he wanted her to grow a lot.

“Oval,” Dash grunted, her kicking legs making craters in the earth, “You’re making me so fuckin’ big…”

Oval didn’t let up. It was almost cruel, how persistent he was - licking and sucking her clit as it grew bigger under his tongue - but his desire to see his girlfriend grow was making him greedy. He needed Dash to be bigger than ever. Bigger than anything. He clapped his hands onto her expanding ass, feeling the flesh grow beneath his fingers as he ruthlessly ate her out.

“Well, in case it ain’t obvious,” said Applejack, wringing water from her hair on the lake house’s deck, “My mission was a big fuckin’ bust. Ya’ll come up with anything?”

Pinkie Pie understood the seriousness of the situation - really, she did - but she couldn’t resist a setup. “Speaking of big busts-”

“Yes, yes, Pinkie,” said Rarity, waving one hand dismissively. “We did in fact make some progress, Applejack. I imagine it would have gone much quicker with one of our magical experts on board, but we have established… I suppose you’d call it a resonance between our geode stones. We’ve succeeded in sending messages between ourselves, and we were just about to attempt to contact Sunset and Twilight.”

“You pulled that off while I was over there gettin’ my butt kicked?” said Applejack, pulling her geode-stone necklace from inside her shirt. “Mighty impressive, Rares.”

“Well, it was a group effort,” said Rarity, “and I certainly don’t claim to know how it works; the stones seem to respond to intent more than anything else. Now then, if experience is any guide, this will go more smoothly if we all work together…”

The girls all raised their geode stones and - none of them quite sure how to “do magic” - they focused their thoughts on getting a message to Sunset Shimmer. Their stones glowed, and the space between them lit up with a swirl of color…

“Princess Twilight’s through the portal,” said Twilight. Sunset was focused on driving, but out of the corner of her eye she could see letters forming on the pages of the magic book that Twilight had open on her lap. “I’ll have her wait my lab, okay?”

“Yeah, sounds good,” said Sunset. “Maybe she can even start working while we... “ She felt a buzzing vibration on her neck, and paused. “... the hell?”

Keeping one hand on the steering wheel, Sunset lifted the geode that hung around her neck and clasped it in her palm. It reacted to her touch, glowing brightly - and then speaking.

“Hello, Sunset? Twilight?” Rarity’s voice called out. “If you can hear this, please say something, we have urgent news.”

“Oh boy,” muttered Sunset. “Is it at least a familiar problem?”

“Yeah, nothin’ we didn’t see comin’, I guess,” said Applejack’s voice. “The growth ain’t easy to resist, but those two didn’t last long at all. And Dash was talkin’ like she wanted to go wreck up a city again.”

“In retrospect, it was pretty optimistic to think they’d keep their hands off each other for the six hours it would take to pick up Princess Twilight and drive back to the lake house,” said Twilight.

“Well, now that we don’t have six hours,” sighed Sunset, “What do we do?”

“So is this the same thing she did last time?” asked Applejack.

“Yeah!” said Pinkie Pie. “Twilight knows all these hackers and… I guess she has tons of hacker cred? Probably more cred now, since this plan saved tons of people last time…”

“Her friends can trigger an evacuation,” said Rarity. “I don’t think the three of us can stop Dash and Oval from wrecking the nearest city, but we can try to make sure no one gets hurt…”

“I suppose the rest of it is out of our hands,” said Rarity. She turned back to the lake house and its demolished wall. “I suppose the property damage I have suffered is rather trivial compared to what the city will endure…”

Her geode glowed purple - and a glow of the same color clung to the lake house’s broken walls. Rarity squinted in concentration and focused her thoughts through her magic crystal, and watched the wall start to put itself back together.

“You know,” said Rarity, “These stones are more versatile than I realized…”

Even Rainbow Dash’s giant body had its limits. Not even she could cum forever. Oval looked up and saw the state she was in - her flushed face, her rainbow bangs stuck to her forehead with sweat, her eyes rolled back in her head. She was done.

She was also huge. Her orgasm had gone on a hell of a lot longer than Oval’s had, long enough that her thighs overshadowed his prone body. Her breasts were half a mile away, dominating the horizon beyond the expansive landscape that was Rainbow Dash. “Holy shit,” she groaned, her body almost totally motionless, “That was something else, dude.”

“Yeah, I might have gone a little overboard,” said Oval. “I just wanted to see you big, Dash.”

“Yeah, I guess so,” said Dash. “Shit, I can’t see you. Just how big did you make me, dude?” She lifted her head until she could see past her boobs. “Damn, little guy, you really went to town. You like it down there, huh?”

She brought her legs together, closing them around Oval, pinning him between her thick, powerful thighs. Rainbow Dash had always had powerful legs, and her growth had only augmented that - but it had also added a smooth, beautiful layer of softness. Trapped between her thighs, his face just inches from her pussy, Oval struggled playfully against her skin. Her thighs could have crushed buildings easily - and certainly would have, if she’d subjected them to the same force she was currently exerting on Oval Office. Oval, at one-fifth her size, was durable enough that he wasn’t being hurt, but he couldn’t possibly have escaped unless Dash let him.

“Mmm, maybe I should keep you there,” said Dash, shifting her hips around Oval. “Just keep my little guy trapped between my legs so he can eat me out whenever I feel like it… whenever I wanna grow, I can just shout down to you and you can start licking.”

Oval breathed onto Dash’s pussy lips, making her body shiver. “Damn,” said Dash, “I’m already good to go again… You just gave me the biggest orgasm of my life, and I’m already starting to, like, ramp back up.”

Oval took this as an invitation, sinking his face into Rainbow Dash’s big wet pussy - but Dash responded by opening her legs and scooting backwards. “Hang on, Oval,” she said, “I don’t want to get too much bigger unless you’re coming along with me. It’s cool to be bigger than you, but I don’t want to lose you. And I don’t need you to be tiny; everyone else should be tiny. You get to be my big man.”

“Oh yeah?” said Oval. He lifted himself onto her belly and crawled up her body, raising his head to rest his chin on her immense tits. “Do you want me to be big now? Wanna see me grow again?”

“Yeah,” said Dash, “But not quite yet. Gimme a second to appreciate ya before my little man becomes my big man again.”

She lifted one hand and brushed her huge fingers affectionately through Oval’s hair. Oval felt a pleasurable shiver go through his body at her touch, and he sighed happily as he let himself relax. His head settled into her cleavage, sinking gradually lower as she stroked her hand along his back. He could feel Rainbow Dash’s pounding heart through her chest… and as he lay atop her, the beat of her big, powerful heart grew calmer.

Oval Office felt his own body relaxing as he lay on Dash’s chest. Even though his head was between her tits, there was something almost innocent about the moment they were sharing. Oval had spent the past few days being almost uncontrollably horny, struggling to keep himself away from Dash, and it was nice to have a little time to just chill. When he’d had a crush on Rainbow Dash, he hadn’t just imagined their relationship as a whirlwind of sex - he’d imagined moments like this, where they lay together, just feeling the warmth of each others’ bodies, breathing the same air.

Oval opened his eyes and looked out over the landscape. When they’d arrived at the lake house, it had been trees as far as the eye could see… but now there huge swathes of downed trees, crushed flat by Oval and Dash’s bodies. The woods had been forever changed by their lovemaking… and neither of them had even intended any of the destruction. Both of them were so big that the flick of a finger could bring down a dozen trees at once… and they’d been doing a lot more than flicking their fingers.

At his normal size, Oval would have felt guilty about laying waste to this much natural beauty. But his new, bigger body felt desire and excitement far more strongly than guilt - and besides, he and Dash were replacing the natural beauty with landscapes that were far more beautiful. Whether it was his own huge, muscular body or Dash’s towering, godly womanhood, they were better-looking than any lake or mountain. Every forest that was laid flat, every city that was demolished, simply made way for the two of them to become bigger, until continents cracked beneath their intertwined bodies.

Oval crawled forward, over the soft mounds of Dash’s tits, and brought his face to hers. Although Oval was the one who initiated, Dash was instantly the one in control of the kiss; at five times his size, she naturally took command of any interaction. Her tongue penetrated his lips, filling his mouth completely, as her lips engulfed his. Her hands, which moments ago had been softly caressing him, now pulled him closer. One naughty hand squeezed his butt, kneading his glutes - and Dash’s mouth seemed to be on the verge of consuming him as the kiss went on.

She broke the kiss with a wet pop, and looked at Oval with eyes that were just as hungry as her mouth. “Baby,” she said, “You are so fuckin’ hot, at any size. But I think I’m ready to see you get big again.”

She gripped his body with both hands and held him as she rose to her feet. Oval looked down as he rose into the sky, watching Rainbow Dash’s body ascend to its full height of five thousand feet. He could see for miles, from this height - he could see the curve of the mountains, the edges of the forest, the snaking lines of the highways… and the distant city, with its tall, glittering towers.

Rainbow Dash set Oval Office on one shoulder. It was actually a pretty comfortable fit; with a body one-fifth as wide as Dash’s, he had plenty of space to stretch out up there. “God, you’re cute like this,” said Dash. “I’ve got a sexy little boyfriend I can just keep on my shoulder… or between my legs… But I’m ready to see you grow again. I want to see those broad shoulders, that tight ass, and that long cock get really, really fuckin’ big…” she grinned. “And I want to show you off when it happens. I want people to watch your bod get huge, and then I want to show ‘em that that body belongs to me.”

“So we’re heading into the city?” asked Oval.

“Hell yeah,” said Rainbow Dash. “Don’t get me wrong, dude, your love and admiration is awesome. I’m totally feeling it, it nourishes me, all that shit... But I need more than that. I need…” she rubbed her chin thoughtfully. “Well, I always thought I wanted to have millions of fans. But now that I’m the biggest, sexiest chick alive, I’m thinking more like… billions. Of worshippers.”

The thought of Rainbow Dash as a towering goddess sent a surge of arousal through Oval. “I like the sound of that.”

“And hey, you’ll get your fair share too,” said Rainbow Dash. “Handsome guy like you… once you’re a mile tall, there’ll be tons of chicks willing to worship that handsome body and that big, long cock…” She reached a hand up to her shoulder and ran a fingertip over Oval’s crotch. “It’d almost make me jealous… if I weren’t the only woman big enough for a man like you.”

She set off towards the city, her long strides quickly taking her out of the woods and past crisscrossing roads. She paid little attention to where her feet were landing - she left footprints in farmland, then collapsed strips malls and suburbs under her heels, until finally she stood at the edge of the city.

(Had she bothered to look, Rainbow Dash might have noticed that the city seemed oddly bare, as if an evacuation had taken place. But Dash was far more interested in the idea of a city of worshippers than the reality.)

“This is the place, Oval,” said Rainbow Dash, lifting her boyfriend from her shoulders and setting him down on top of a city block. Oval felt low buildings crumble underfoot, kicking up clouds of dust around his ankles. “You ready to get big?”

Oval shot a glance over his shoulder at the city. “I’m already pretty big,” he said. “There’s like one building taller than me… and none that even come close to you.”

“You might be big, Oval,” said Dash, kneeling down to bring her face closer to his, “But I want you bigger, and Rainbow Dash gets what she wants.” She let herself fall forward, landing on the palms of her hands… and began to crawl towards Oval, licking her lips in playful menace. “I want to watch that cock grow, Oval. Wanna see your trouser snake get thicker and longer til it’s the tallest fuckin’ skyscraper in this little town. I wanna feel it grow… inside me…”

Oval backed away from Rainbow Dash - not because he disliked anything he was hearing, but because the predatory way she was prowling towards him seemed to demand it. He would play the part of the frightened prey animal right up until the moment he got caught.

His backpedaling took him over several city blocks, each footfall demolishing a building or two. And what Oval Office didn’t destroy, Rainbow Dash took care of handily. On hands and knees she crawled after him, and her palms left cracked craters of asphalt in their wake, turning everything beneath them into unrecognizable messes of concrete and steel.

Oval, still backing away, finally encountered a building tall and solid enough to make him trip. He fell backwards, his butt caving in a three-story mall - and Dash kept right on coming, her smile growing wider as she closed in on her helpless prey. And Oval was feeling pretty helpless - he was staring at Dash’s fat, dangling tits, mesmerized by the way they wobbled in the deep blue shadow of her body.

Before he knew it, she was on top of him. At the last moment, she pounced - and when she landed, her breasts came down on top of his chest, knocking the wind out of him. “Got you,” she purred. “And I’m hungry for meat.” She lifted her body and placed a fingertip on the head of his stiff cock. “This is a mouthwatering piece of meat, right here… but I’m so hungry, I think I need to make this thing bigger.”

She descended on his cock, engulfing his entire crotch in her open mouth. She ran her tongue over his junk, from his fat blue ballsack all the way to the tip of his dick. “Mmm,” she said, lifting her head slightly, “very tasty. Can’t wait for it to plump up…”

She went back down on him, drawing her tongue over the length of his dick. There was no real technique to what she was doing; she was just licking at his cock like a popsicle, satisfying her hunger with the flavor of Oval’s manhood. “Mmm, I can feel it,” moaned Oval, “I’m gonna get big for you, Dashie… make me big so we can crush this town together…”

Dash licked faster, moving her attention up and down his junk. One moment she was focused on his balls, flicking at them with the tip of her tongue - and then she was attacking the head of his cock, overwhelming him with sensation. Groaning, mutely gasping, Oval Office grabbed for buildings to steady himself against - only to have them crumble in his grip. When his grasping hands had demolished every building within reach, he clawed at the ground, shivering as climax built inside him.

He came, his load splashing against Dash’s huge, wet tongue. And that first spurt of cum, enough jizz to overflow a swimming pool, was accompanied by a surge of growth. He grew at least a hundred feet in that first instant - his shoulders knocked buildings aside as she grew, and his weight cracked the pavement, creating a deeper crater beneath him. His cock pulsed with rapid, powerful throbs, each one firing another thick splatter into Dash’s mouth.

Rainbow Dash’s moans were sounding happier and happier each time she got another taste of Oval’s cum. She could see and feel him growing, and she sucked eagerly at his lengthening cock as her hands stroked his toned thighs. He grew in earth-shaking bursts, each surge of expansion leveling more and more of the city around him - until, panting, his cock shot its last gush.

“Not bad,” said Rainbow Dash, running long fingers over Oval’s chest, “but you’re still too small. So, ready or not, you’re gonna fuck me.””

Rainbow Dash was still twice Oval’s size, easily - and so she completely overshadowed him when she crawled atop him. Her face, all in shadow, was wide-eyed and grinning, and her tits hung threateningly above his face, ready to smother him at any moment. “Ready to go again?” she asked, lowering her hips until her pussy lips brushed against the head of Oval’s stiff cock. “You gonna rise to the occasion, Oval? You made me cum long and hard last time, made me grow so fuckin’ big… now it’s time for you to catch up.”

She centered her womanhood over Oval’s cock and slammed her hips down, engulfing him completely. Her cunt was somewhat spacious at first - owing to her size - but when she flexed her pussy muscles, her slick walls grabbed his shaft tightly. “You ready to get big for me, Oval? I want to fuck up this little town, and I wanna do it with you. But for that to happen, you gotta get big for me.” She began to pump her hips, sliding her pussy up and down his length. “You ready to grow, baby? Tell me you wanna be big and strong for me…”

“Yeah, I wanna grow, I wanna get big for you, Dash,” gasped Oval, writhing beneath her. “My cock’s gonna grow… gonna get big enough to fill you up…”

“That’s the spirit,” growled Dash. “Having a cute little boyfriend on my shoulder is fun, but what I really need is a man.” She pumped her hips harder, slamming them into the ground, deepening the crater under Oval’s firm blue ass. “Tall… broad-shouldered… rippling with fuckin’ muscle… with a big… fat… cock!” Holding his shaft tight in her tensed pussy, she rode him hard - he felt his cock surging with arousal again, despite his recent orgasm.

Oval’s cock was already well over thirty stories tall, big enough to smash buildings apart with a casual swing. But Rainbow Dash was a lot of woman now, tons and tons of curvaceous womanhood, and she needed Oval to be huge. “Mmph, make me big,” groaned Oval Office, “I wanna be big enough to fuck you for real. I’ll give you all the dick you can handle, deep and hard… I wanna get so big I can give you miles and miles of cock…”

“Hell yeah,” hissed Dash, “Hell yeah, dude, hurry up and cum so I can watch that hot bod get bigger... I need you to give me that giant dick.” She descended on Oval Office, burying him beneath her colossal sky-blue body. Her tits smothered him, covering his face completely, as her hips jackhammered at his crotch. He couldn’t breathe at all - when he tried, all he got was a tiny bit of warm air that bore the fragrance of Rainbow Dash’s soft skin.

He could barely move - every part of him was pinned down by Rainbow Dash. Her hands were holding down his wrists, her legs were holding his legs in place, and her tits were smushed against his head, blocking out all light and air. He couldn’t move, and he couldn’t possibly escape. He could suffocate here, beneath her tits, as she fucked him relentlessly.

Rainbow Dash’s lovemaking was relentless, brutal - a sort of revenge for the way he had made her cum her brains out. From base to tip, she gripped his dick with pussy muscles that could crush a skyscraper flat. He moaned into the pillowy flesh of Dash’s tits, his voice muffled into silence by breasts as big as football stadiums. His balls tightened, and his hips jerked, and he felt growth exploding in every nerve of his body…

Dash felt Oval’s quivering body grow tense beneath him, and then she felt his cock throb inside her, fighting against the iron grip of her pussy muscles. At first she held him tight, overpowering him easily - but then his cock grew, gaining almost a hundred feet of length in a fraction of a second. It pushed back against her inner walls, forcing her to loosen her grip - and now that his dick wasn’t so constricted, the first gush of cum rocketed up his shaft and exploded from the tip.

“Fuck yeah, dude!” she yelled out, her voice shaking foundations all over the city, “Hit me with that load! Get big, you fuckin’ sexy animal!”

And Oval did get big. Dash felt herself rising up on a cushion of firm flesh - of gorgeously toned manliness - as each pump of cum, each spasm of climax made him bigger and bigger. She felt his cock filling her pussy, taking up every inch of space until he was snug… and then one last surge of growth made it a wonderfully tight fit. He was finally big again. The perfect size, from head to toe.

Oval Office gasped for air as his growth freed him from Rainbow Dash’s suffocating tits. He saw her beautiful, grinning face - a bit flushed and sweaty, but still gorgeous. He wrapped his arms around Dash’s body and pulled her closer, lifting his head to meet her lips. She joined the kiss eagerly, opening her lips to let Oval’s tongue probe her mouth. This time Oval took command of the kiss - his most recent surge of growth had filled him with confidence, not to mention a raging passion.

He twisted his body, rolling to the side and taking Rainbow Dash along with him. Their rolling bodies demolished a whole district of the city, smashing old brick buildings and knocking statues to the ground. Oval pulled back from the kiss, looking down at the beautiful girl beneath him. “I was really hoping to make you cum,” he said. “Guess I wasn’t big enough, huh? But I know I am now.” He pumped his hips, working his cock out and back into her pussy.

“Don’t worry, big guy,” said Dash. “I was holding myself back on purpose… and it wasn’t easy. I just didn’t want to cum again before you did. If we came together, we’d both grow. And I’d be bigger than you again, and I wouldn’t get my big man back. I need you huge, so you can fuck me for real.”

She brushed a lock of yellow hair away from her eyes. “And now that you’re nice and big, how about you fuck me for real?” She rolled her hips. “Now that you’re a god, what do you want to do with that divine cock?”

“I’m glad you asked,” said Oval, with a devious grin. He pulled out of Dash, eliciting a long, lusty moan from her lips - and then he brought the tip of his cock to her bright blue asscheeks, sliding the slick member into her deep, dark buttcrack.

“Ooh, I like it,” said Rainbow Dash. “I’ve got this big round bubble butt… and I don’t even know what it feels like to get it fucked. I bet my ass is real tight… and I bet it feels fuckin’ great to have a cock in there.” She flexed her cheeks, squeezing the tip of Oval’s dick. “Just give me a little second to grab a toy, okay?”

She shook her shoulders, and Oval Office rolled off of her. Rainbow Dash stood up, setting her eyes on the center of the city and the still-standing tallest skyscraper. She couldn’t put a name to the architectural style of the building, but it shape was very inviting - it seemed like it was just the toy she was looking for. She knelt next to it, setting her fingertip on on its rounded top, and eyeballed its size. It was maybe eight hundred feet tall, to Dash’s five thousand - probably a bit longer than she needed, actually, but that wasn’t a bad thing.

She turned to Oval, making sure her man was watching - then she interlocked her fingers behind her head, straddled the skycraper, and bent her knees. The structure began to disappear into her, sliding up inside her immense womanhood… and soon she’d swallowed up all of it. Anyone still inside the building - if indeed anyone was - would have seen those massive wet lips sliding over the windows that lined the rounded building, dripping fluids down in thick streaks as they descended.

Dash flexed and bent her knees a few times, taking long hissing breaths as she felt the building enter her. Oval, enticed, came closer - and Dash reached a hand down to the base of the building and ripped it from its foundation. “Okay,” she said, “I’ve got my toy. Now get in this ass, big guy.”

She fell to her knees and leaned forward, supporting her body with one hand. The other hand, naturally, was still on the base of the skyscraper. She worked it gently around her pussy, keeping herself warm as she awaited Oval. And she kept her hips raised, gyrating them slowly to entice her boyfriend to hurry up and fuck her ass.

“Oh my god, get in me,” she groaned, looking over her shoulder as Oval positioned himself behind her. “I need it, Oval. I need it more and more the bigger I get… I think we’re just gonna have to grow forever, because every time I see that dick get bigger just want it more… and every time I get it I just want to see it get bigger.”

“Sounds good to me,” said Oval. He knelt behind Dash, parting her ass with the head of his cock, seeking out her pucker. “I can’t think of anything I’d rather do than grow with you, forever.”

He positioned himself at her asshole, wrapping his hands around her hips for balance. “Just let me know if I’m too big,” he said - and then he thrust.

Dash grunted in shock as Oval entered her. His cock had been a snug fit in her pussy, but in her ass it was brutal. She was feeling every inch of that skyscraper cock, her ass crying out as it was stretched by the girth of his colossal blue member. His cock was a hundred feet wide, big enough to demolish anything build by human hands. Big and strong and thick enough to fuck a hole through a mountain. And it was hammering at Dash’s ass, plunging deeper with every thrust.

Dash struggled to form words, but each ramming thrust made her gasp feebly. She was going to beg Oval to slow down, to give her a second to adjust - but the more thrusts she took, the better it felt to be stretched. The pain faded, and now each thrust just sent a jolt of pleasure through her pussy. “Fuck yes, dude, hit me deep,” she groaned, “Give me everything.”

“You’re so tight, Dash,” Oval grunted. “Am I big enough for you back here? Am I your big man again?” He hammered away at Dash’s ass, sending an intense rhythm of shockwaves through the city. Cracks spread out along the ground, centered at the spot where Oval’s hips slammed into Dash’s ass like a meteor strike.

“Oh yeah,” Dash gasped, “you’re so fuckin’ big, Oval… and I need you to cum inside me, baby, I need you to grow bigger inside my big thick ass... “ She worked the skyscraper in and out of her pussy, gliding its rounded edge against her clit. “Mmm, I gotta cum too… from now on we’re gonna grow together, baby…”

Applejack sprinted forward, pumping her powerful legs as she struggled to keep her footing on the violently quaking ground. The closer she got to the two giant lovers, the more the earth shook - but her enhanced body was strong enough to stay upright. She was almost at Rainbow Dash’s thumb - a hundred-foot-tall thumb whose fingerprint was a labyrinth of enormous blue whorls.

Applejack clutched Dash’s geode in her hand, and she felt its magic start to wake up as she drew closer to Rainbow Dash’s body. That was a good sign. This plan really might work.

When she came to the last thirty yards, Rainbow Dash’s hand abruptly lifted into the air - and then slammed back down to earth as Dash’s high, raspy voice cried out deafeningly. She was coming.

Dash’s hand came rushing at Applejack. But it wasn’t just coming at her - it was expanding in all directions as her climax made her body grow. In an instant, Applejack was swept up by Rainbow Dash’s body, tumbling onto the back of her giant hand. She clung to the growing expanse of soft blue skin, pressing Rainbow Dash’s geode stone against the giantess’ body.

As Rainbow Dash came, her ass clenched around Oval’s cock, seizing tightly on his cock. He gasped, his body tensing, and his skyscraper cock pumped a thick white lake of spunk up from his fat, dangling balls. They came together, and they grew together. They spread over the city, crushing everything flat with their huge, perfect bodies…

“Now! It has to be now!” yelled Sunset Shimmer. Dash and Oval were growing at incredible speed, and there was no telling when it was going to stop. Even here, at the outskirts of the city’s suburbs, they might not be safe.

Twilight clutched her geode stone in one hand, placing her other palm on a complex array of crystals - a sort of magical circuit board - that she’d assembled hastily on the drive over. Twilight’s geode glowed, resonating with the crystal array - and the other girls’ geodes joined in the resonance, surrounding them with a prismatic glow.

All they could do now was hope - hope that Applejack had made it to Rainbow Dash’s body, hope that the resonance would reach Dash’s geode, hope that the spell would actually work. And it needed to work quickly, because there was a tidal wave of flesh coming at them. Rainbow Dash’s right foot, blue as the sky and nearly as large, was about to roll right over them…

And then it was gone. There was nothing looming over them but the sky, the real sky, swirling with soft, gentle clouds. It was a moment before any of them looked down - but when they did, they saw Oval, Dash, and Applejack lying woozily at their feet. Oval was still inside Dash, his body twitching with the last moments of climax… but they were both back to normal size.

Then they turned their eyes upward, towards the ruined city. “You know,” said Rarity, “I also managed to get the geodes to rebuild my family’s lake house, but this… Hm. This seems like a rather large project for us to tackle.”

Chapter 1

Oval Office kissed his way up Rainbow Dash’s neck, sliding himself slowly into her. Throwing back her head, she groaned out a long “ohhh…” that grew louder the deeper he got - and eventually she went from moaning out“oh” to moaning out “Ovallll…”

“Dash,” whispered Oval Office, “Your body is amazing… I mean, it was amazing before, but now it’s… you’re beyond amazing, Dash.”

“Oh, dude…” Dash moaned, reaching her hands down to grope Oval’s ass, “You really get me, Oval. You get that I’m fuckin’ awesome…” She kneaded his glutes with her fingers, pulling him deeper into her each time he thrust. “And you… mmph, you were cute before, but now… now you’re tall and strong and you got a big cock…”

Oval was intensely aware of the size and length of his dick; before Dash had “infected” him with her magical growth, he’d gotten used to being average - but now he was huge. His body was taller and stronger, but his dick had grown more than the rest of him. Yesterday, when he and Rainbow Dash had grown, his dick had ended up over a hundred feet long - a tall, throbbing tower of dark blue flesh. It had felt incredible to be that big, to live and to fuck at that size. And while his body wasn’t toppling buildings anymore, he was still big all over - and the cock he was sliding into Dash’s pussy was twelve inches long and nearly as thick as his wrist.

And Dash was big enough to take it, with a pussy that embraced every inch of him with its strong, slick walls. Even before her growth, back when she’d had her track-and-field physique, he’d admired her from afar. He’d watched her in motion, her hair flowing like a rainbow waterfall, her muscles glistening with sweat, and he’d found her beautiful back then.

But overnight, her body had grown taller and stronger and her curves had rounded out enormously. Her slender rear end had ballooned into a perfectly round bubble, and her A-cups had become… F-cups, maybe? They were huge, at any rate, and the growth spell’s magic made them impossibly firm, supporting themselves beautifully with no need for a bra. With the aid of the magic spell, she’d blossomed into the perfect woman - and when the spell made her grow into a giantess, she’d been better than perfect.

Of course, it had resulted in kind of a lot of property damage. But now, with his dick deep in Dash’s pussy and her hands groping at his back, it all felt worth it. Still thrusting, he lifted his upper body to get a better look at her. Her mouth was wide open and moaning, her face flushed, her rainbow bangs falling over her sky-blue skin. Her tits were jiggling with every bed-shaking thrust that Oval Office drove into her - and the sight of it made him thrust harder, making the bed beneath them rattle violently.

Oval reached down and placed his palms over her breasts, squeezing the soft, smooth flesh. Her boobs were far more that a handful, too big to ever get his fingers around. All he could do was squeeze harder, sinking his fingers into those beautiful blue mounds. Dash moaned at his touch, her pussy clenching as Oval massaged the sensitive flesh of her tits. God, she was beautiful, even more so when they were making love. He could barely take his eyes off her body…

But for a moment, he did take his eyes off her body - and it was probably a good thing, because he noticed that the first time that his bedside table was farther away than it should have been. Farther away and smaller. And turning his head revealed more alarming details: the ceiling was slowly growing closer, and his and Rainbow’s legs were extending off the end of the bed, almost long enough that the soles of their feet brushed the wall.

“Dash,” he groaned, “Dash, we’re growing again…”

Dash, whose eyes were shut tight, didn’t treat this news with the seriousness it deserved. “Aw, yeah,” she whimpered, “Let’s grow, Oval. Get big inside me, go deep with that giant dick, make my tits grow bigger and bigger… I wanna grow with you til our fuckin’ makes earthquakes…”

Dash’s words made Oval’s cock surge and his head swim. It felt so good to get bigger, and Dash liked it too… He wanted to share another giant-sized climax with her, to thrust a hundred-foot-long cock into her immense womanhood and feel those powerful muscles throb around his cock as he released gallons of cum.

He just barely convinced himself not to give in… but he couldn’t stop. His hips were almost moving on their own; his body wanted this. Not just to cum, but to grow again. “Dash, we’re growing,” he repeated, “we’re really growing, we’re gonna break my bedroom…”

At that moment, something did break - not the bedroom, but the bed, which collapsed noisily underneath them. Dash’s eyes snapped open, and she looked around the room, seeing the same warning signs that Oval Office had. “Oh, shit,” she muttered, “we’re really growing, but… fuck, dude, don’t stop. I don’t care how big we get, if I don’t cum I’m gonna die…”

“I can’t stop,” gasped Oval. “I don’t want to destroy my house, but I wanna cum and I wanna be big with you…”

“Me too, babe,” groaned Dash.

Oval fought to keep himself under control. He couldn’t stop himself from fucking Dash, but maybe he could get some help… “Dash,” he said, “Can you… call Twilight? Maybe she can help…”

Dash turned her head and shouted to her phone, voice-activating it to call Twilight - but after four rings with no answer, Dash groaned and hung up. “Uh, maybe Sunset?” suggested Oval, and Dash - somewhat reluctantly - tried Sunset Shimmer.

After a couple rings, Sunset picked up, muttering into the phone. “Dash?” she said, “I’m still mad at you, but if you’re calling because you’re having magical problems, then…” the line was silent for a while. “Are you fucking?”

Dash and Oval weren’t trying to make noise, but they couldn’t help the moans that escaped their mouths as pleasure overloaded their growing bodies. Nor could they help the creaking of the ruined bed and the overburdened floor beneath them as Oval thrust into Dash.

“Yeah,” said Oval. “But it’s making us grow again… and we can’t stop…”

“You can’t stop?” said Sunset. “Well, I mean… if you can stop, then definitely stop. But if you literally can’t stop, then I guess just try and finish quickly. And don’t fuck again. I’ll be right over.”

“You heard her,” said Rainbow Dash, stroking the small of his back. “You gotta finish it. Gotta make me cum or I’ll never stop growing…”

Oval started to thrust faster, driving his cock deep into Rainbow Dash. He could tell Dash was close - but if he wanted her to cum now, he needed to go hard and deep, overwhelming her love tunnel with sensation. Her pussy was sensitive, highly responsive to the right touch, but her body demanded a lot from a lover. Luckily, Oval Office had the strength and size to give her what she needed.

Each thrust made the floor creak and groan as their growing bodies put more and more mass on it. Their feet were up against the wall now, and they bent their knees to keep from busting through. Oval could feel his back hitting the ceiling every time he lifted his body, and he knew there wasn’t much time left. “Dash,” he moaned, “We’re getting too big, I don’t know if I can finish fast enough… I think we’re gonna keep getting bigger…”

And those words - the tantalizing prospect of outgrowing another bedroom and bursting, naked, into the night air - was what drove Dash over the edge. Squirming beneath him, whimpering and then crying out as her climax built in her core and exploded outward into her massive body. There was a final surge of growth, enough that the heels of her feet dented the walls - and then her body, still cumming, stopped growing.

With Dash taken care of, Oval still had himself to worry about - and with short, quick thrusts inside Dash’s spasming cunt, he brought himself to the brink, until his balls tightened and his climax went off like a rocket. His body tensed, and his cock unloaded rapid bursts of thick seed, pumping a giant-sized load into Rainbow Dash. He felt a brief surge of growth, putting his back against the ceiling… but he could tell he’d stopped growing.

“Okay, sounds like you two finished up,” said Sunset, over Dash’s phone. “You still growing, or…”

“Uh...” said Oval, “I thought you hung up. Didn’t you say you were gonna get here soon?”

“Well yeah,” said Sunset, “I’m driving now. Speakerphone. So… growing? Not growing?”

“We stopped growing,” said Oval. “But we’re too big to leave the room… and we can barely move…”

“Okay, we can work with that,” said Sunset. “Just don’t fuck again, okay?”

“No promises, Sunny,” said Dash playfully. “Oval’s still inside me, and it feels good.”

Sunset groaned. “Dash?” she said, “I know I don’t, like, completely have the moral high ground when it comes to not abusing magic. But I’m pretty mad at you for stealing my book and ignoring my advice. Can you just do the right thing and not fuck for like ten minutes?”

“Yeah,” Rainbow Dash muttered. “I was just kidding, Sunset. I’ll be good.”

“Awesome,” said Sunset. “Later.” She hung up, and Dash sighed, lying back against the ruined bed.

Oval wiggled hips hips, trying to gradually work his dick out of Rainbow Dash. His and Dash’s bodies took up almost the entire bedroom, and his butt was already close to the ceiling, leaving him very little space to maneuver. Slowly - and thanks in large part to his dick going soft - he managed to pull his cum-slicked cock out of her pussy. She sighed as pulled out - and it wasn’t a sigh of relief or of pleasure. Her face was pensive, distracted.

“Are you okay?” asked Oval Office.

“Yeah,” said Dash. “But Sunset’s right to be mad at me. I mean, messing with magic got me this rockin’ body and an awesome boyfriend, but it was selfish, and I tricked Sunset and Twilight… it could have gone really bad.”

“Well,” muttered Oval, almost too low to be heard, “We did do like millions of dollars of property damage-”

“It could have gone so bad,” said Dash. “I put my friendships at risk, and… I really owe her an apology.”

“Well… Sunset knows how important forgiveness is,” said Oval. “I think you know the difference between right and wrong, Dash. You just have to… not let anything get in the way of that.”
“Well, I’ve got you,” said Dash, “And I’ve got this body… I don’t think there’s anything else that’ll tempt me to abuse magic for a while.”

With some careful movements, the two of them shifted their bodies. From his position on top, Oval lowered himself onto the floor beside Rainbow Dash. With nowhere to go and nothing to do, they spooned atop Oval Office’s smashed bed, embracing in a bedroom that their increased size made extremely cozy.

And - a little sooner than expected - Sunset Shimmer came through the bedroom door. It just so happened that Oval Office’s ass was the closest thing to the doorway - and Sunset, intending to just take a couple steps into the room, walked straight into his bare buttcheeks.

“Sunset?” said Oval, looking at her over his shoulder. “You okay back there?” He felt Sunset’s tiny hands pushing back against his glutes, slightly tickling his dark blue skin as she steadied herself.

“Yeah, I’m all right,” said Sunset. “I just wasn’t expecting your butt to be, like, right there…” Oval Office couldn’t help but notice that her hands were still on his skin, exploring the shape of the muscle beneath. She let out an appreciative whistle as she squeezed the firm flesh, whispering “Damn, this boy’s big…”

“Hey!” said Dash, turning her head to glare at Sunset. “Hands off my man, all right?”

Sunset stepped back, lifting her hands from Oval’s rump. “Sorry, sorry,” she said. “It’s just… your bodies, both of them, they’re… pretty remarkable.”

“Well… I owe you an apology too,” said Rainbow Dash. “You tried to warn me, and I ignored you, and… hey, wait a minute. How’d you get into Oval Office’s house?”

“Lockpicks,” said Sunset casually, as if it was the most natural and obvious answer. “So anyway, I have the same cure Twilight administered yesterday. And based on the formula she gave me, I should be able to give you the correct dosage…”

“Should?” asked Oval nervously.

Sunset took her smartphone from her pocket. “She actually wrote a little script where I can punch in your current height and it gives me the right dose.” She squinted at the two giants. “You’re a little bunched up, but… you’re both like ten feet tall, right?”

“Yeah, give or take,” said Dash.

Sunset fiddled with her smartphone, then took a bottle and two vials from her purse. She poured out two doses, eyeing the blue liquid carefully, then leaned her body against Oval Office’s shoulderblades and raised the vials. “Say ahh,” she said, and Oval and Dash opened their mouths. She poured a dose into each of their open mouths, and they swallowed the flavorless fluid.

“Uh…” said Oval Office, “Wouldn’t it have been better to give one of us the medicine and see if it was the right dose... before using it on the other one?”

“Hm, good point,” said Sunset. Then, shrugging: “Well, Twilight’s the methodical one, not me. Hopefully I measured it right.”

Oval and Dash, at the same moment, felt their heads swim. Most likely, it was a less powerful version of the effect they'd felt when Twilight had shrunk them down from skyscraper height. That dose had knocked them unconscious, but this smaller concentration just gave them a woozy feeling - and that was joined by the sensation of falling.

As it turned out, that was simply what it felt like to shrink. Growing had been intensely pleasurable, multiplying the sensations of sex and climax - but shrinking wasn't as fun. It didn't hurt or anything, but it didn't excite in the same way.

“Woah,” mumbled Dash, rising to her feet as she felt herself stop shrinking. She patted at her body, first feeling for muscle and then clapping a hand onto her tits and her ass. “Ahh,” she sighed in relief. “I'm still super sexy.”

Sunset rolled her eyes. But Dash was right: the modest dose of shrinking potion had reduced her to the height she'd been before she and Oval Office had started making love. North of six feet, with huge tits and a thick, round ass.

“Ooh, and Oval’s still a hunk, too,” she said, eyeing up her boyfriend as he stood up. “I was worried you'd put us back to, y’know… normal.” The way she said normal, resounding with hollow dread, struck a chord with Oval.

“Well… you know I would still love you, right?” said Oval, putting a comforting hand on her shoulder. “You had a really great body before all this…”

“No, yeah, I know,” said Dash. “I mean, we've been over this. You were cute as hell before you got all sexified by the magic potion. But after feeling what it's like to be big and sexy, I don't want to go back to being slim little Dashie with the bee-sting tits. Especially considering how good it feels to fuck in a body like this…”

“Well then, I've got bad news for you,” said Sunset. “That potion was…” she paused, frowning slightly. “By the way, feel free to put your clothes back on anytime you like.”

“Oh!” said Oval. “Right, yeah.” He found where he'd tossed aside his clothes and started dressing himself, and Dash followed suit.

“Anyway, bad news,” said Sunset. “What we've learned from this incident is that Twilight’s counterspell potion did not cancel out the effects of the original spell. You two are still growing when you have sex. And it's going to keep happening every time until we figure out a real cure.”

“Oh,” said Oval, pulling his socks on as he sat on his ruined bed. “Uh, how long is that going to take?”

“Hard to say,” said Sunset. “The original effect came from three spells infused into a liquid - which, by the way, was actually a really bad idea. Liquid infusion introduces volatility that can amplify and perpetuate effects in just this fashion. Twilight is learning quickly, but there's a lot she doesn't know about magic.”

“Well, don't blame Twilight,” said Dash.

“I don't,” said Sunset sternly. “At all. I still blame you, Dash.”

“Oh,” said Dash, her face falling. “Yeah, I guess I am the only other person you could really blame.”

Sunset sighed. “Look, I'm not asking you to feel bad,” she said, “but you do need to abstain from sex until Twilight and I have figured out a proper counterspell. If you fuck, you'll grow again, and we've already seen that you have a hard time stopping once you've started.”

“Well, we wouldn't start smashing buildings this time,” said Oval.

“No, that's just the thing,” said Sunset, “you might. One of the strength-enhancement spells in that potion is also designed to reduce inhibitions and dampen your reasoning skills. It was cast on soldiers on some old, brutal wars… the spell actually has kind of a fucked up history.”

Oval winced. “Well, that explains some things about how we… acted…”

“Yeah,” said Sunset. “Twilight and I will work on dispelling that effect too. It might take a while, but our cure should put you back to normal…”

Rainbow Dash raised her hand.

“Yes,” sighed Sunset, with a roll of her eyes. “You'll get to keep your extra-sexy bodies. I know you'd never shut up about it if I took that away.”

Rainbow Dash lowered her hand.

“Okay,” said Sunset, “I'll drive Dash home. And until we get you that cure… no sex, no masturbation. Honestly, I'd recommend the two of you keep some distance from each other. The less temptation you have to deal with, the better.”

Oval woke up the next day feeling refreshed. Despite its unexpected complications, his roll in the hay with Rainbow Dash had left him with a sunny feeling that nothing could take away. Even though he’d spent the night on a smashed mattress, he’d never felt better-rested.

And keeping his mind off sex was easier than he expected. His schedule didn’t put him in the same classroom as Rainbow Dash today, so the “temptation” that Sunset warned about was easy to avoid. He passed her in the halls a couple of times, and he couldn’t help but admire her body - but once she was out of his sight, he didn’t find it too hard to refocus his mind on school. He felt good about the way things were going.

After the last class of the day, he got Sunset’s cell number from Applejack and sent her a text. Hey Sunset, it’s Oval. Not trying to rush, but do you know when you and Twilight are going to have that cure?

Sunset’s answer came in under a minute. Hard to say. Heading to Twilight’s now. Could be ready tomorrow but prob not. You doing OK?

I’m all right, wrote Oval. Temptation wasn’t a problem today.

Another text popped up, this one from Rainbow Dash. hey oval, you know how in some movies a person will be talking on a phone and the person they’re talking to will be right behind them and it’s like, do the people who wrote this movie even know how phones work???

Oval raised an eyebrow, trying to interpret the text - and after a moment’s thought he turned around to find Rainbow Dash grinning behind her. “Hey dude!” she said - and she lowered her phone, giving Oval Office an unobstructed view of her chest.

“Hey Dash!” he said. “It’s great to see you, but… we probably shouldn’t hang around each other too much, right?”

Dash rolled her eyes. “I don’t know about you, but I felt fine today. I wasn’t all… growth-horny like I was while we were fucking. I think it’s out of my system for a while. I mean, don’t get me wrong, I’m looking forward to the next time you and I can fuck… but I can go without it for a while. How about you?”

Oval sighed. “Yeah, I feel okay too. As long as we stay out of each others’ bedrooms, I think we can hang out without causing any more catastrophes.”

“Awesome!” said Dash. “Are you starving? ‘Cuz I’m starving.”

“Wow, this was the perfect choice for our two-day-iversary,” joked Rainbow Dash, as the waitress set down her burger.

“Yeah, the same diner as our first and only date,” said Oval Office, smirking. “Looks like you’re not as hungry today, though. Just one burger this time?”

“Hey, I was a growing girl,” said Dash. “And growing, and growing…”

Oval chuckled. “Careful,” he said. “Too much talk like that, we might give in to irresistable temptation…”

“Yeah, we’re playing with fire here,” said Dash, keeping her voice low and casting a quick glance at the neighboring booths. “Who knows what might happen if I started talking about how big the two of us got… about the way I shook my giant tits in your face when I was growing right before your eyes…” She nibbled thoughtfully at a french fry, staring at Oval with mischief in her magenta eyes. “Do you remember how my pussy tasted, Oval? When you buried your face in it, licking up that warm, sweet pussy juice? If I had any doubts about you, the way you ate my mouthwatering cunt put them to rest…”

At first, Oval laughed off her seduction… but the longer she went on, the more it was starting to work. He did remember the taste of her pussy, and the memory gave him a hunger that the club sandwich on his plate would not satisfy. “Hey, c’mon, Dash,” he said, “take it easy on me, okay?”

“Oh no,” said Dash, licking her pale blue lips. “Am I tempting you? If I accidentally get you too horny, are you going to start growing right there in your seat? Mmm, I’d have to watch my handsome boyfriend busting out of his clothes… I’d have to see those lovely muscles ripping the seams of your shirt… and then the table would start to rise as your cock got big and hard underneath it…”

Dash’s body started to gyrate slowly in her seat, and one of her feet began to nudge at his ankle. “All the little people would run away... and we’d have the diner to ourselves, Oval. Your cock would be so big that I’d put my face right up to the tip and make out with it, slurping up a big mouthful of precum… ooh, and then I’d use my whole fuckin’ body to jerk that monster off. Slide my tits and my thighs up and down that beautiful blue shaft until you shot a load so big it coats the whole floor.”

Under the table, Dash’s bare foot crept up Oval’s leg, tickling his thighs as it came ever closer to his crotch. Oval knew he should stop her - but he was quivering, held in rapt attention by the fantasy Rainbow Dash was sharing with him. “And then it’s my turn to get big,” said Dash. “You’d pick me up and lay my little body down… and your pinky finger would be just the right size to fill my cunt. With just your littlest finger, you’d stretch me, you’d make me squirm… and then I’d start to get bigger. Pretty soon, you’d need two fingers to fill me up… then more… I’d be begging for your big cock the whole time, and once I was big enough… you’d give it to me.”

Her foot finally arrived at Oval’s crotch, and she gently pressed at his stiffening cock with the ball of her foot. The intimate touch made him gasp - but it also shocked him out of his trance. He jerked his body sideways, moving his crotch out of Dash’s reach, and met her eyes with a worried expression.

“Dash,” he hissed, “I know you’re just having fun, but… you’re kinda making this harder than it needs to be. I wasn’t having any trouble up til now, but… it’s gonna be hard not to jerk off tonight.”

“Geez, sorry,” said Rainbow Dash. “I’m… kinda not being a great girlfriend, am I?”

“No, come on,” said Oval, reaching his hand across the table to rest it on hers. “I know you’re frustrated by the no-sex thing, especially since our relationship has just gotten started. I’m frustrated too.”

“Yeah,” said Dash, slumping in her seat. “I’m glad you stopped me before I got any further, honestly. I was starting to get pretty horny too.” She rubbed her temple, ruffling her rainbow bangs. “Maybe I better just eat my damn burger.”

The rest of the meal was awkward, with both Dash and Oval afraid to say something that would constitute temptation. The threat seemed very real now; Oval distinctly recalled what it was like last night, when neither of them could stop themselves from fucking. How close was he to that state of mind? How much more flirtation would it take for him and Dash to lose themselves in a frenzy of lust and growth?

Rather than find out, they finished their meals in relative silence and went their separate ways with no more than a hug.

Oval Office and Rainbow Dash started the next day with the best of intentions. Waking up alone, they showered their tall, powerful, sexy bodies without giving in to temptation. Dash struggled in particular; she found herself fantasizing about sharing the shower with Oval Office, soaping up his strong shoulders and his washboard abs… and tempting him with her body, inviting him to fuck her in the steamy shower stall.

Even as she drove thoughts of Oval Office from her mind, Dash couldn't help but be turned on by her own body. Running soapy hands over her breasts, she felt a thrill shoot through her, a tantalizing sample of the pleasure her body was capable of. Touching her nipples made her pussy twitch, and she feared that it would be enough to set off a surge of growth - but luckily it seemed to have no particular effect.

Soaping up her ass was also an ordeal. Like her tits, it was a part of her body that had grown far more than the rest of her - and that seemed to have made it a hotspot of sensual pleasure. Those perfectly round blue cheeks, yielding at the touch of her hands, seemed to electrify her cunt, making her whimper and groan in frustration.

With a surge of willpower, Dash turned the shower’s knob, turning the hot, steamy flow into an ice-cold blast. And although her new body was built for pleasure, and seemed to delight in any stimulus… it still didn't like being assaulted by frigid water. Her immense libido shrank back to a manageable size, and she toweled herself off, shivering, and got dressed for school.

She didn't see Oval before the first bell at Canterlot High, but she couldn't avoid him at second-period history. And as luck would have it, the only seat left when she made it to class was right next to him.

She used to be glad to sit next to Oval… and part of her still was happy about it. But that was the part of her that she was trying to keep under control. Her pussy was a powder keg of growth… wonderful, dangerous, destructive growth… and it pulsed with arousal at the sight of Oval Office.

Oval and Dash traded glances throughout the class, admiring each others’ bodies for mere seconds before tearing their eyes away. Rainbow Dash noticed Oval’s dick getting hard, just like it had the first day she’d grown… but since that day, his dick had grown into a long, thick, meaty beast - and the bulge it created as it stiffened was impossible to miss. Turning her eyes upward, she saw the discomfort in Oval’s face as he squirmed in his seat, trying to work his cock into a more comfortable position. It looked like torture; Rainbow Dash knew that her boyfriend’s dick wasn’t meant to be imprisoned within constricting jeans. It was meant to stand free in the open air, proudly extending from his tall, toned bod. Ideally, it was meant to stand out from a skyscraper-sized body, protruding a hundred feet out and casting a long, girthy shadow. And the only thing that should ever contain it should be the immense, godlike womanhood of Rainbow Dash.

Back in reality, Dash felt her pussy growing slick and hot, and she dug her fingernails into the palm of her hand. A little pain was enough to prevent her fantasy from going any further... for the moment. The rest of the class was a repeating cycle for both Dash and Oval - they would each drift into their respective fantasy worlds, then snap themselves out as their arousal spiked to worrying heights.

When the period ended, they both rushed out of the classroom in different directions. Dash managed to move more quickly - not simply because of her natural speed, but because Oval Office had a boner to contend with. His face, normally a handsome blue, was tinted purple by a flush of embarrassment as he covered his crotch with a textbook.

Truthfully, he had nothing to be embarrassed about. An unwanted boner was a classic high school nightmare scenario, but no one else in Canterlot High - maybe no other eighteen-year-old for a hundred miles - had a dick that compared to Oval’s. The other girls in the class didn’t quite know what to make of Oval’s recent growth (most likely, many had correctly drawn the conclusion that it was related to Dash’s), but there was no denying that it made him, like, world-class hot.

During class, Dash had noticed that she wasn’t the only girl who couldn’t keep her eyes off of Oval Office. And the old Rainbow Dash, the one with A-cups and no ass to speak of, would have been threatened by all that attention being focused on her boyfriend. But becoming a sex goddess had sent her already healthy self-esteem into the stratosphere. No one could compare; no girl had her huge, firm tits or her perfect bubble butt. There were a couple who almost had her proportions, but Dash was like a scaled-up version of them. She was - at a rough estimate - twenty percent bigger. And she knew now: Oval Office liked it big.

Of course, Oval Office wasn’t the only one getting admiring looks. As Dash walked the halls of Canterlot High, she turned plenty of heads herself - some male, some female. And that was nice. It was good for the ego. But Dash didn’t anticipate being tempted by any other guys; her body deserved the best. She needed to be held by strong arms and filled by a cock long and thick enough to touch every inch of her inner walls.

Dash and Oval still didn’t share many classes, so it was easy to avoid him for the rest of the school day. And the track team had practice today; hopefully some vigorous exercise would help her blow off steam and keep her mind off sex.

But when she showed up to practice, she was confronted with something she couldn’t believe she’d forgotten. Applejack, loitering around the shot put circle, was also the beneficiary of the magical potion that had turned Oval and Dash into giants. And like the two of them, she hadn’t been shrunk all the way back to normal size. She was just as tall as Dash, just as busty, with an ass every bit as round…

Granted, this was an improvement over the way things had been. Throughout most of their friendship, Applejack had been far more developed than Rainbow Dash, and Dash had been quietly jealous for years. That jealousy had turned red-hot when the two of them began to compete for Oval Office’s affections… and, of course, that had resulted in their enormous, destructive three-way two nights ago.

But when all was said and done, Dash and Applejack had ended up at the same size. And Dash could live with that - especially since she was the one who ended up winning Oval Office’s heart.

So there was another girl at Canterlot High who could compete with Dash’s physique. A pang of fear stabbed at Dash’s heart, but only for the briefest of moments. Oval Office was a stand-up guy - and Applejack, who was honest to a fault, had agreed that Dash had won Oval fair and square. And with a body like that, Applejack would have plenty of guys to choose from.

But at the moment, she didn’t seem pleased.She was pensively holding a shotput, testing its weight in her hand, as Dash approached.

“Hey AJ!” called Dash, and Applejack turned to her, brightening at the sight of her friend.

“Howdy Dash,” she said. “Sunset tells me you’re havin’ some trouble with some, uh… aftereffects?”

“Yeah,” said Dash. “I can’t… cum… or else I’ll get big again.” Something clicked in her head. “Oh! What about you? You gotta keep your hands off yourself too?”

“Well… ‘parently not,” said Applejack. “After Sunset figured out what was happenin’ to you an’ Oval, she had Twilight drive out to my place an’...” She trailed off, a blush darkening her freckled face. “Well, we had ta know if I was affected in the same way, so she came an’... observed… while I touched myself.”

“And?”

“Well… I made it to… completion,” said Applejack. “And… nothin’ happened.”

“Seriously?” said Dash. “That means… uh… what does that mean, exactly?”

“Well, Twilight reckons that you got that potion first-hand, and Oval got it second-hand… and me gettin’ it third-hand is just enough to keep me from bein’ affected.”

Dash chuckled. “Third-hand” was an adorably polite euphemism for how the effects of the magical potion had been passed along. Oval had gotten it from eating Dash’s pussy, drinking deeply of her fluids… and Applejack had gotten it when Oval Office’s big blue cock had smashed through her roof and flooded her bedroom with jizz.

“Well, that’s lucky,” said Rainbow Dash. “Oval and I have to keep our hands to ourselves until Sunset and Twilight figure out an… anti-potion… but you can just put all this behind you and enjoy your big sexy body.”

Applejack’s expression turned pensive again, and she tossed the heavy shotput up into the air - way up into the air - and caught it effortlessly as it came back down. “Yeah, maybe,” she said. “But… I ain’t sure if it’s totally fair fer me to compete in sports, what with bein’ magically big ‘n’ strong.”

“Oh,” said Dash. “Yeah, that’s… hmm. Well, let’s figure that out later. Right now I just need to focus on anything that isn’t sex.”

A small, grassy hill overlooked Canterlot High’s track, providing a pleasant spot from which to spectate. In the past, Oval Office had come here after school to do some reading, enjoying the sun and occasionally lifting his head to watch the feats of athleticism down on the track. In fact, this was how he got to know Dash and AJ - in time, he’d come down to spectate them more closely, admiring them and getting to know them better.

But today he was back on the hill, watching from afar - because he knew that he shouldn’t be here. He should be driving home, thinking about history and mathematics and other dry scholarly pursuits. Not watching Rainbow Dash’s perfect body dominate the track.

But he couldn’t help himself. He was worried about Rainbow Dash, who was beautiful and strong and bold… but also dangerously impulsive. Oval loved her, but if she had any self-control then she wouldn’t have gotten herself and Oval into this whole mess.

But of course that was just an excuse. A flimsy justification for Oval Office to come out to the track and watch his beautiful girlfriend. The truth was, Oval himself had less self-control than he gave himself credit for - at least when it came to Rainbow Dash.

He arrived just in time to see her start the hundred-yard dash. The other girls cast nervous glances at her as they knelt in the starting blocks, unsure of what to expect from their enlarged teammate. Come to think of it, Oval wasn’t sure what to expect either; Dash’s new body was strong and nimble in the bedroom, but its curves didn’t seem to be built for track and field. There was a reason why Dash’s slim body had been ideal for running… and why young women with massive breasts didn’t typically dominate footraces.

But when the rubber hit the road, so to speak, magic triumphed over physics. Rainbow Dash exploded out of the blocks, her long blue legs propelling her forward with unreal speed. Her breasts, despite being bigger than the other girls’ heads, stayed firm on her chest. Oval had seen those breasts jiggle, when Dash had stuck out her chest seductively… but right now, when she needed them to behave, they were staying out of her way. Magic really was incredible.

Dash, crossing the finish line at full speed, was even more astonished at her miraculous chest. After she slowed to a stop - barely sweating and not short of breath, she realized - she tried hopping a few inches off the ground. When she hit the ground, her tits jiggled like two queen-sized servings of flan… but they’d been absolutely still while she was running. “Holy shit,” she gasped, openly groping herself through her white t-shirt. “You two and I are gonna get along just fine.”

Dash hadn’t anticipated that her body would have even more wonderful surprises in store, and the discovery sent a thrill down her spine… all the way down to her pussy. Simply feeling her sky-blue boobs jiggle was a huge turn-on, and groping them only amplified it. As soon as her fingers sank into the warm, pillowy flesh, Dash’s curiosity instantly transformed into lust - and she couldn’t take her hands off herself.

Dash told herself that she was just examining herself, getting a feel for the gorgeous magical globes on her chest. As long as she wasn’t touching her pussy, she told herself, she wasn’t at any risk of growing. But sex was already beginning to consume her mind, and a tiny part of her mind started to think that maybe, just maybe, it wouldn’t be so bad to touch herself right here. On the track. In front of everyone.

After all, they were already watching what she was doing to her tits, right? She was already embarrassing herself, looking like a sex-crazed slut in front of the whole team. What kind of girl played with her boobs in public, helplessly kneading her soft mounds where everyone could see her? They already knew what kind of girl she was… fingering her wet slit could hardly make things worse.

And come to think of it… who cared what they thought of her? As soon as she started touching herself, she’d begin to grow. These tits, these marvellous tits would tear her pathetic shirt to shreds as they expanded. Her stretchy gym shorts would last only moments longer before her ass ballooned too big for it to contain. Naked, her body soaring past twenty feet, she would flick and stroke and penetrate her womanhood until fluid streaked down her towering legs. And once she came, she would surge with growth, perhaps hitting a hundred feet, her fingers flicking sweet liquid onto the tiny track team. Then she would stride across campus, leaving wide footprints in Canterlot High’s lawn, seeking out her boyfriend.

Oval Office, his cock stiffening as he watched Dash grope her tits, had a parallel fantasy. Dash seemed only moments away from sticking her hand down her gym shorts, and if that happened… well, he couldn’t let her grow alone. He’d have to join her on the track, rubbing at his crotch through the fabric of his pants, and plant a kiss on her moaning lips. They’d hold the kiss for a moment, tongues wrestling, tasting each others’ mouths… but soon they would begin to undress one another.

They would start gentle, of course, but lust would erode their patience. They would begin to tear at each others’ clothes, using their enhanced strength to rip the flimsy fabric away. Bare, with the track team watching, he would slip his hands beneath Dash’s round blue bottom and lift her up - then lower her down onto his cock. Standing, embracing, they would fuck. Oval’s hands would explore Rainbow Dash’s body, tracing her curves and feeling them grow under his fingertips. Dash would stroke Oval’s arms and his back - and then find her way down to his marvellously toned ass. Together they would grow, their bodies overshadowing the track, then the school… and when they came, their cries would shake all the windows in town.

And their fantasies were coming dangerously close to becoming real. Dash sent one hand creeping downward, below her bust, past her belly button… And then Applejack caught her by the wrist, holding her hand in place.

“Dash!” she hissed, “Y’all can’t do that!”

“Shit,” gasped Rainbow Dash. “Sorry. I couldn’t help it…” Applejack’s tight grip on her wrist was enough to snap Dash out of her sexual trance, and she took her other hand off her chest.

“This is gonna be really difficult fer ya, ain’t it?” Applejack sighed. “Do ya need my help?”

“Yeah, I think so,” said Dash, hanging her head.

Up on the hillside, Oval Office was shaking off his sexual daydreams as well. He naturally possessed a bit more self-control than the impulsive, spunky Rainbow Dash, so the mere sight of Applejack intervening in Dash’s self-love was enough to cool him off. Of course, his fantasies had left him with a prominent hard-on… and his magically enhanced dick was slow to go back down after it became hard. Shifting his boner into as comfortable as a position as he could get it, he stayed seated on the grassy hill, trying to clear his mind as his erection subsided.

But a voice made him turn his head - and he saw Applejack and Dash climbing the hill as they left the track. “Darnit! You too, huh?” said Applejack, striding over to him with Dash following behind. “Lemme guess, Oval. You came out here to ogle Dash, even though you knew the smart thing to do was avoid her as long as possible. That sound about right?”

“...Yeah.”

Applejack sighed. “You know we’re countin’ on the both of y’all to stay away from temptation, right? Now, I know you two have it harder that me, and, hell - maybe you’re tryin’ your best. But I’m startin’ to think yer best ain’t good enough. So I’m assignin’ myself as yer chaperone. I’ll make sure you two keep some distance between yerselves… and I’ll be there to slap yer hands away from yer junk when I need to.”

“Yeah,” said Rainbow Dash, “For real, I don’t know if I can make it through the rest of the day without help.”

“Well all right then,” said Applejack. “Dash, yer comin’ with me, we’re gonna shower up and meet Oval Office outside the gym.” She turned to Oval Office. “Oval,” said Applejack, “Yer job is to forget I mentioned anything about showerin’.”

She led Dash away by the hand. Oval, still trying to get his cock to go down, tried to think about baseball.

“You were right, AJ,” said Rainbow Dash, resting her chin in her hand, “This is awful.”

“Well, I wasn’t commentin’ on the artistic merit,” said Applejack. “I was just thinkin’ it wouldn’t be arousing.”

On the way to her car, Applejack had looked up possible activities on her phone. With her authority as chaperone, she decided that the three of them were going to see Dark Corridor, a horror movie that had been unanimously panned by critics and crowds. Not scary enough to raise anyone’s heartrate, not bad enough to be funny, with an audacious one hundred and forty minutes of runtime. It sounded absolutely mind-numbing - and with any luck, it would also numb the lovebirds’ libidos enough that they could get through the night without sex.

“But yeah,” said Applejack, her eyelids drooping, “it is pretty bad.”

The movie was in the third week of its theatrical run, and word of its quality had gotten around - so aside from them, the theater was completely empty. An empty theater could be a dangerous place for two horny eighteen-year-olds who needed to avoid temptation, but Applejack was occupying the seat between Oval and Dash. As much as their bodies wanted it, they weren’t going to be able to sneak any hanky-panky past Applejack.

And the awful film was doing its job pretty well. In the dark theater, neither Oval nor Dash could get a good look at the other one’s body. Applejack’s stern supervision discouraged them from touching themselves, and so there was nothing for them to focus on but the film. By the two-hour mark, all three of them were bored and miserable - but they weren’t thinking about sex. Applejack was squirming in her seat… but not for sexy reasons. And when she couldn’t take it any longer, she stood up and turned to address her friends.

“All right,” said Applejack, speaking over the film, “I gotta use the ladies’ room. I don’t feel great about leavin’ you two alone, but I’m at my limit. I’m trustin’ y’all to behave yerselves fer like five minutes, all right?”

They nodded, and Applejack left the theater.

They sat in silence for about half a minute, respecting the unoccupied seat that Applejack had placed between them. Finally, Rainbow Dash spoke.

“Hey, Oval,” she said, “I know this is all my fault, and… I don’t even know if I apologized to you. But I’m really sorry.”

“You’ve apologized enough,” said Oval Office. “I’m glad we’re together, and… hopefully we’ll be able to put this behind us soon. Your friends will make a cure, and we’ll get to be a normal couple.”

Dash scoffed. “Normal, huh? Well, if it’s with you… I’ll take it.”

Smiling, Dash turned back to the movie screen. But the scene had changed abruptly while they had been talking, and now it showed a woman waking up to discover that her bedroom was shrinking all around her.

At least, that had probably been the director’s intention - and in more capable hands it could have been an effective horror sequence. But Oval and Dash looked at the scene and saw growth. They saw a beautiful woman growing larger, outgrowing her bedroom - and their snoozing libidos awoke instantly.

“Oh, shit,” groaned Dash, groping her tits with both hands. “I was wrong, this movie kicks ass.”

By the light of the screen, Oval could see Dash groping herself - and only then did he realize that he was stroking his inner thighs, his fingers dangerously close to his stiffening cock. There wasn’t even anything arousing on the screen anymore - the film had moved on to the next unremarkable scene - but that little spark had lit a blaze inside him, and it would take a concerted act of willpower to put it out.

But Dash wasn’t about to give him the chance. As he looked at the screen, a dark shadow blocked his view and descended onto him. Then the world went completely dark as his head sank into the softest flesh imaginable. Dash was smothering him with her tits, pressing her chest against his face. He could still breathe, but only barely - and the air that entered his lungs was scented with the sweet fragrance of Rainbow Dash’s skin.

“I gotta grow, Oval,” moaned Rainbow Dash. “I gotta fuck, my pussy’s so fuckin’ wet… I don’t care what happens, I don’t care if we smash up the theater or the city or the whole fuckin’ world…” She jammed her hand down his pants, grasping his shaft. “I need this, Oval. I need you to fuck my pussy and suck my titties and make me big.”

Oval felt Dash working his fly open, freeing his dick. “Just let me ride this beautiful cock, Oval,” she groaned, stroking his shaft into full hardness. “We’ll fuck til morning, and every time we cum our perfect bodies will get bigger and bigger… I’ll have tits bigger than mountains and you’ll have a cock that could knock the fuckin’ moon out of the sky…” Her tits, still covering Oval Office’s face, rose and fell with deep heaving breaths. “Just say yes, Oval. Just say you’ll fuck me so we can be gods.”

“Oh, fuckin’ come on!” shouted Applejack, stomping up the steps to the row where Dash was seducing Oval. Growling, Applejack grabbed Rainbow Dash by the shoulders and yanked her away from him.

“Dash, what the hay am I s’posed to do with ya?” demanded Applejack, her voice just barely below a shout. “Maybe I was wrong to think this was a one-woman job.” She sighed, pulling her phone out of her back pocket. “All right, who ain’t busy? Maybe Pinkie or Rarity has time to babysit ya, Dash?”

She tapped at her phone for a short time, then frowned silently as her texts went unanswered.. “You know what? Forget it. I can handle this. Oval, put yer cock away, we’re goin’ for a drive.”

Gravel roads gave way to dirt as the car ride entered its third hour. Applejack and her two passengers drove into the night, barely exchanging a word. As soon as they’d gotten in the car, Applejack had started playing a true crime podcast through her car’s speakers at a jarring volume, and Dash and Oval had taken this as a hint that she wasn’t in the mood to talk.

And so Rainbow Dash and Oval Office, shamed into silence, had no idea where Dash was taking them. It was dark, and the territory was unfamiliar; Oval saw dense trees and the reflection of the moon in the surface of a lake, but those weren’t exactly concrete landmarks.

And finally, just as the podcast was approaching a revelation that Oval was genuinely looking forward to, Applejack stopped the car. “All right,” she said. “Oval, get on out. You’re stayin’ here tonight.”

“Here?” said Oval, stepping out of the backseat and trying to make out any shapes in the moonlight. He couldn’t actually tell whether there was a “here” here - but when he looked in the direction Applejack was facing, he saw a modestly sized but modern house, tucked away between the trees by the lake.

“Yeah, this place is Rarity’s,” said Applejack. “Her dad’s, anyway. I think he was hopin’ fer boys… or at least a couple of more outdoorsy girls.” She sighed. “Uh, don’t tell Rarity I said that, all right? It’s been a long day an’ my trademark honesty is sorta on autopilot.”

“Okay,” said Oval. “So why am I staying here?”

“Because I trust ya more than I trust Dash,” said Applejack. “I’m takin’ her back to the farm to keep an eye on her. You’ll stay here and not jerk off. An’ if ya can’t help yerself… just get outside before ya get too big, okay? I’m pretty sure this place is insured, but I’d rather ya leave it intact. We’re all comin’ up here tomorrow fer a get-together.”

“Oh,” said Oval. “So I won’t be alone here too long, then?”

“Nah, Dash probably woulda invited you up, if things weren’t so weird. So yer just gettin’ here a little early. Plus it’s actually real nice. I’ll give ya a quick tour.” She led the way to the front door, taking a spare key from her pocket.

“And… you trust Dash enough to leave her alone in the car?” asked Oval.

Applejack sighed wearily. “I don’t enjoy bein’ cross with Dash,” she said, “And I haven’t forgotten how good it felt to be growin’... and how none of us were even thinkin’ about how maybe we should stop. Dash ain’t got it easy right now, an’ neither do you… but I’m over here bustin’ my hump and it ain’t exactly a picnic.”

Applejack let Oval Office in, checked on the water and the electricity, and showed Oval a first-floor bedroom. “Don’t worry about me an’ Dash,” she said, forcing a smile. “We’ve been through worse. Tonight, you just try not to touch yerself… and who knows! Maybe when all the girls come to the lake house tomorrow Twilight’ll have a cure for ya!”

“I hope so,” said Oval. “Once this is all over… we’ll make it up to you somehow.”

Standing in the doorway, he waved goodbye to Applejack. He turned his eyes toward the car, where Dash was miserably slumped in the passenger seat, and waved in her direction too. She returned the gesture feebly, and they kept their eyes on each other until Applejack turned the car around and drove out of sight.

Oval paced the lake house for a while, making himself a dinner of granola bars from the kitchen’s stock of non-perishable food. He grabbed a book blindly from a shelf in the living room, opened it somewhere near the middle, and flopped down on the bed.

There was still a mild pressure in his crotch, an insistent need for release… and just like Applejack had said, it wouldn’t be too terrible if he grew out here. The nearest house was miles away; if he stepped outside, cranked one out, and grew to ten or twenty feet tall, there wasn’t much around for him to destroy.

But being quarantined by an angry Applejack had kind of killed the mood for him. Fully clothed, he pulled the bed’s covers over himself and closed his eyes, trying to fall asleep as quickly as possible.

Oval woke up to the sight of his morning wood tenting the thick covers. He experienced a brief moment of panic, imagining that a wet dream might have triggered a round of growth - but the bedroom around him was normal-sized, his clothes still fit, and he hadn’t soaked the sheets with jizz.

He considered skipping his morning shower - his erection wasn’t going away, and stripping down and slicking up seemed like a risky prospect. On the other hand - he did just sleep in his clothes, and sometime today a bunch of girls would be coming over. He decided to risk it, keeping the water as cold as he could comfortably bear. In the bedroom’s dresser, he found a clean flannel shirt that must have belonged to Rarity’s dad, and found it to be a pretty good fit.

And after that, there wasn’t much to do but sit on the deck and stare at the lake. Reclining in a deck chair, watching the water ripple gently, Oval Office started to see the appeal of a secluded living space. It was calming - and while Oval still had a hard-on, unable to shake the morning wood he’d woken up with, his mind was mostly clear of dirty thoughts.

But even in his meditative state, he couldn’t resist checking his phone every so often - even though the first look had showed him there was no cell service out here. He desperately wanted to get a status update on the cure from Twilight and Sunset, but until they showed up he’d have to stay in the dark, with a boner poking up past the waistband of his pants.

When a car engine broke the silence, Oval leapt from his seat and raced through the house, throwing open the front door to greet the girls. They’d arrived in a car he didn’t recognize - although since Rarity was driving he took it to be hers - and they piled out, pulling coolers and overnight bags from the trunk. Rarity, Pinkie, and Fluttershy were the first to leave the car, and they greeted him with varying levels of enthusiasm as he approached.

Sunset and Twilight, Oval noted, were conspicuously absent from the car - although there would scarcely have been anywhere for them to sit, with Applejack and Rainbow Dash occupying so much of the back seat. Their asses, two big round bubbles of equal width, must have left little room for Fluttershy.

Applejack emerged first, taking a long swallow from a tall cup of coffee. She was bleary-eyed, leaning weakly on the car despite the strength and size of her body. Rainbow Dash, on the other hand, looked great - and once she saw Oval Office, she spread her arms and stepped forward to embrace him.

But Applejack threw out an arm, her reaction time much better than her weary body language suggested, and caught Dash before she could get to Oval. “No hugs,” she muttered, and took another chug of her coffee.

“Oh come on!” said Dash. “Not even a hug? Come on, you can just tackle me if things get too steamy.” Dash’s pouty face was adorable - especially contrasted with the outrageously curvy body it was attached to. Oval’s sense of isolated serenity was shattered by the sight of Rainbow Dash - the girl with the unreal body, the girl who desired him just as much as he wanted her. If they did hug, Oval was pretty sure AJ would have to tackle him; feeling Rainbow Dash’s body against his would just overwhelm his defenses.

“Sunset an’ Twilight are on their way,” said Applejack. “Y’all ain’t gotta wait much longer for yer cure, and once you get it the two of y’all can find a bedroom an’ go nuts on each other. Til then, takin’ risks is just damned foolish.”

“Yes, thank you for volunteering one of the bedrooms in my family’s lake house for Dash and her boyfriend to fuck in,” said Rarity. “When I gave you that spare key, I was hoping you’d turn the place into a love motel.”

Applejack just shrugged.

“I was only joking, darling,” Rarity apologized. “Of course it’s fine. And I should have known you wouldn’t be in the mood for jokes, after getting no sleep at all last night.”

“Applejack watched Dash all night!” said Pinkie. “Just to make sure nothing naughty happened…”

“Yeah, and nothing did happen,” said Rainbow Dash. “Applejack was so sure I was gonna touch myself, or just come in my sleep, and it was fine.”

Applejack’s expression darkened, and Dash rushed to correct herself. “But, uh, I appreciate that you sacrificed a night of sleep to keep me safe. You’ve been a good friend throughout all this, and I’ve been… less good.” Oval’s heart sank when he saw Dash’s dejected expression - Applejack was probably right, and their friendship had been through worse, but right now they were both feeling the strain.

“Thanks, Applejack,” said Oval. “We owe you a lot.”

“Just doin’ what needs doin’,” said Applejack. ‘But if y’all feel like makin’ it up to me, I’m sure we can figure out some kinda - oh thank heavens.”

Applejack dropped the arm she’d been holding up between Dash and Oval, and she slumped against the car, her enhanced bust wobbling as she slid down onto her butt. Dash and Oval turned to look where Applejack had been facing - and they saw Sunset pulling up to the house with Twilight in the passenger seat.

Oval and Dash broke into a run, almost throwing themselves onto the hood as Sunset and Twilight calmly exited.

“You have the cure?” asked Oval breathlessly. Twilight stepped back, a little intimidated.

“Er, yes,” she said. “We finally cooked it up this morning, and we both feel really good about the results! But in case it needs any tweaking, we’ve got the mobile lab in the trunk-”

“So we can take the cure?” asked Dash. “And we can have sex?”

That’s probably the best way to test it,” said Sunset. “Now, the spell is in tablet form now, and you will want to chew it. Once you’ve swallowed it, you should be good to go.” She pulled an orange pill bottle with a ripped label from her pocket, dropped two pills in her hand, and held them out. Oval and Dash each grabbed a tablet, chewed hastily, swallowed… and turned to Sunset expectantly.

“You should be fine now,” said Sunset, shrugging. “Have fun, I guess.”

Rainbow Dash and Oval Office turned to each other, taking in heavy breaths as they looked over each others’ bodies. Oval had done his best not to look directly at Rainbow Dash since she stepped out of the car, but now he really let himself see her. Her wide magenta eyes, framed by rainbow bangs. Her pale blue lips, smiling hungrily between flushed cheeks. Oval Office had started to fall in love with that face even before their first date and the whirlwind of sex and growth that followed. And it was just as beautiful now - but it sat atop a body that was unreal.

Dash’s chest was heaving with each deep breath she took. Those tits, those big blue melons that Oval had cradled in his hands, squeezed and teased and pinched, were just inches away from him. And then there was her ass, even bigger and wider than her bust, squeezed tight inside her jeans. Even fully clothed, she seemed almost naked, her enormous assets ready to burst out of her tight top and snug pants.

Over the past couple of days, he’d become scared of his own sex drive. He hesitated to even touch Rainbow Dash, imagining the growth and the destruction he’d been trying to avoid. But now he was cured. He was free. And nothing ever needed to come between him and Dash again.

He took Dash by the shoulders - surprised to be making the first move for once - and pulled her into a kiss. From the first moment, the kiss was passionate, lustful, almost pornographic - Oval and Dash were devouring each other, their slick tongues wrestling amid rising moans. Their hands were every bit as busy, groping and pulling at each others’ clothes - Dash unbottoned the flannel shirt Oval had borrowed, tossing it into the dirt after she pulled it off him. Oval lifted Dash’s top, and they broke the kiss momentarily to get it past her head. Her enormous tits wobbled in the sunlight for a moment - and then Oval and Dash embraced again, and the big blue mounds were smushed between their bodies, rubbing up against Oval’s chest as the two lovers kissed deeply.

“Um… are you just going to do it out here?” asked Fluttershy meekly. “Should we go inside?”

“Mmmph… maybe,” whispered Dash, briefly pulling back from the kiss before diving in again, “Maybe we should… find a bed…”

Oval grasped Rainbow Dash’s hand, intertwining their fingers, and he led Dash inside the lake house. When they made it to the bedroom Oval had slept in, Dash threw herself onto the bed and began to peel her jeans off, freeing her big blue bubble butt. Looking up at Oval with half-lidded eyes, she stroked a finger down from her tits, past her belly button, and finally to the waistband of her pink panties.

But Oval was too horny, too hungry to just passively observe as Dash stripped herself. He crawled onto the bed and leaned his face into her crotch, breathing in the scent of her skin… and her wet womanhood. Baring his teeth, he pulled her panties down, slowly exposing those slick lips, freeing a bouquet of strong, sweet sexual musk. His cock pulsed with arousal, leaking a thick drop of precum - and when he extended his tongue and parted her folds, the taste of her pussy made his manhood throb once again.

“Oh, you’re ready for this,” moaned Dash. “Fuck, I feel like I’m gonna explode…” Oval licked the way around her lips, then flicked at her clit, making her legs kick involuntarily. “Aw shit, Oval, I’m gonna… you gotta stop… I don’t wanna cum without you, I don’t wanna cum without your cock inside me… please, just fuck me…”

Oval could have stayed down there, tasting Dash’s pussy, feeling her squirm beneath him. But now that she was begging to be fucked, he couldn’t deny her what she wanted. He lifted his head and stripped away his pants, freeing his cock.

“Oh fuck, it feels like forever since I saw that dick,” said Dash, grabbing one of her tits and kneading the soft flesh. “So big and so fuckin’ hard, how do you keep your hands off that thing? I swear, Oval, now that we can fuck anytime we want, I’m gonna be grabbin’ that cock… suckin’ that cock… riding that fuckin’ cock every chance I get.” She whimpered, throwing her head back. “I’ve waited so long, I’ve been so good, please just gimme that dick…”

Oval climbed back onto the bed, grasped Rainbow Dash by the shoulders, and eased himself into her. “Aw, how did I live without dick?” groaned Rainbow Dash. “Fuck, if I knew it would be this good, I woulda made myself cum til I was… fuckin’ five hundred feet tall… then torn the roof offa this lake house... so I could suck off my handsome little man til he grew big enough to fuck me.”

“You feel incredible,” said Oval, pumping his full length in and out of her. “Oh, you’re perfect… there can’t be any pussy better than this…”
“I know one thing that would make it better,” said Dash. “If I was the size of a skyscraper, and you rammed my cunny with a dick bigger than a fuckin’ freight train. That’d be even better, huh?”

“Well…” gasped Oval Office, “I mean, we just put a lot of work into making that not happen…”

“Totally,” said Dash, throwing her arms around him, stroking the muscles of his back. “But now that we’re not gonna grow, we can still think about it… I can still talk dirty about how I wanna see your gorgeous toned ass knock over some buildings…” She clapped her hands onto his ass, massaging his glutes with her fingers.

“I guess so,” said Oval. “I mean… I liked watching you grow… and I liked being big… I guess it can be our fantasy from now on.”

“Yeah, that’s the spirit,” said Dash. “I can be your big girl, and you can be my strong, sexy giant… but you gotta fuck me like a giant. How would you fuck if you had a fifty-foot cock, Oval?”

“I guess I’d fuck hard…” grunted Oval Office, “and fast...” He pumped his hips faster, and Dash moaned and clutched at the sheets. “I’d go fifty feet deep in that big wet giantess pussy…”

Dash gritted her teeth, grinning as Oval got into it. “Aw fuck yeah, that’s my big sexy man,” she growled. “Swingin’ that big fat cock, bringin’ down whole cities…”

Dash’s hands grasped Oval’s waist, and with a burst of strength she rolled the two of them over. Before he knew what was happening, Oval was on the bottom, with Rainbow Dash staring down hungrily at him.

“This is what the tinies see,” said Dash, shaking her body to make her tits wobble. “All those little people who aren’t big and beautiful like you and me.” She bobbed her body up and down, riding his cock with growing speed. “When Rainbow Dash the fucking goddess comes to their city. Goddess of victory and beauty and size. They look up at my smiling face and they worship my tits… some of ‘em pray to be spared… some of ‘em beg to be crushed under my boobs…”

She really did look like a giantess from down here, thought Oval. A dangerous, fickle goddess of size… but she was his, and he was just as big, and they would shake the earth with their lovemaking…

“Shit, Oval, I’m close,” gasped Rainbow Dash. “Are you close? I wanna feel that skyscraper cock hittin’ me with an ocean of cum…”

“I’m close,” said Oval. “I’m gonna cum… any second…”

“Yeah, let’s do it, let’s cum together,” groaned Dash, bouncing on his cock with all the strength in her hips. “I just need one thing, Oval, you gotta tell me… you gotta tell me if I’m big.”

They weren’t growing; the bedroom around them was the same size, the walls no closer than before. But Oval felt big. At any size, Rainbow Dash’s love and the embrace of her body was enough to make him feel a thousand feet tall. “Oh yeah,” he said, “You’re big, Rainbow Dash. You’re bigger than anyone, and you’re getting bigger…”

Dash’s hips slammed down onto Oval Office’s cock, slapping his skin with her wide blue bottom. Her body tensed, and her pussy clenched, and she raised a cry to the heavens as she came. Oval, his cock held tight in her cunt, felt his balls tighten as her walls milked his shaft insistently - and within seconds he joined her in climax, his cock shooting harder than it had ever shot before.

And it felt so good, so impossibly, rapturously good - in fact, it was too good. It shouldn’t have been possible for a climax to be so intense - but Oval realized that he’d felt this before. This is how it felt to grow. Looking up, past Dash’s head, he saw that the ceiling was closer than before. He kept his eyes on it, expecting to see it creep closer...

But just as the next throb of climax hit, he and Dash surged with growth, so much growth that her head hit the ceiling. “-the fuck?” she grunted, looking up. “Are we…” she looked around, seeing the same thing Oval saw. The room had closed in, leaving almost no space for the two growing lovers - and Dash felt her pussy starting to throb with climax again. “No, we can’t-” she gasped, “We have to stop-”

But there was no stopping. This wasn’t like last time, when they grew as they made love - they’d stayed at the same size until the onset of climax and now they were growing all at once. Last time they grew because they couldn’t control themselves, because they couldn’t stop themselves from fucking - but now they really couldn’t stop. Even with perfect self-control, there was no stopping an orgasm.

Their bodies rode out the climax in unison - Dash’s pussy clenched, and Oval’s cock shot another load - and their orgasms sparked another surge of growth. There was no space left in the little bedroom, so they outgrew it, bursting through the walls, punching through the ceiling, turning plaster and wood to powder and splinters with the unstoppable growth of their bodies.

Luckily for the lake house, the little bedroom was tucked into a corner of the first floor. The structural damage, as their twenty-foot-tall bodies tumbled out of the house, was immense - but it wasn’t so bad that the whole structure collapsed.

Another surge of growth hit them, and Oval felt his spreading shoulders pushing aside the trees beside the lake house. “Oval,” groaned Dash, “We’re so big…” Oval Office couldn’t tell if Dash was happy or sad about it - and he wasn’t sure how he felt about it either. They’d both fought so hard to prevent this… and yet, it was the greatest feeling in the world.

Each burst of explosive growth was bigger than the last, and the next one stretched Oval’s legs so far that his heels were dipping into the lake. Dash was still on top of him, riding his cock, groping her expanding tits. He was lying flat, but she was sitting up straight on his crotch, her head climbing towards the sky with each surge. There was nothing above her but sky now.

From the tip of his ten-foot-long cock, Oval Office shot gallons into Rainbow Dash’s immense womanhood. They grew past a hundred feet, and Oval could feel that there was more on the way…

A door slammed nearby, and the rest of the girls poured out of the lake house’s front door. Sunset and Twilight looked on in dismay - although they surely already suspected that their “cure” had failed. There was no time to speak - they arrived just in time to see Dash and Oval experience their last - and biggest - growth surge.

Moaning helplessly, the two giants exploded in size. The lake house, or what was left of it, was spared - but beside it, hundreds of trees were knocked flat, crushed beneath Oval’s expanding body. The lake became a puddle underneath him, and he lay back, groaning in pleasure.

Dash, towering above the rolling hills, sent out a cry that spooked birds from their trees for miles around. Her groping fingers sank into the skin of her tits as her orgasm hit is final peak - and then she went nearly limp.

No one spoke for a long time - neither the giant lovers nor the girls watching them. But Twilight Sparkle silently pulled a small notebook from her pocket and began to flip through her notes, looking for errors.

Chapter 3

“As someone with a lot of experience cleaning up magical messes,” said Princess Twilight Sparkle, taking a seat on Applejack’s bed, “I think we can declare this one solved.”

“We really can’t thank you enough,” said Sunset Shimmer. “Even with magic, I wasn’t sure there would be a way to fix all that… destruction.”

“Well, it certainly wasn’t easy,” sighed Twilight, casting her mind back to the myriad spells and artifacts she’d employed to reverse the damage caused by the sexual rampage of Oval Office and Rainbow Dash. “But even though magic was what turned those two into giants, the destruction they caused was… essentially non-magical in nature. And that makes it easier to clean up after them.”

Twilight Sparkle - this world’s Twilight Sparkle, who went by the nickname “Sci-Twi” when the princess was in town, looked sheepishly down at the floor. “But… when a problem is caused by magic…”

“Sometimes it can be trickier, yeah,” said Princess Twilight, giving her counterpart an understanding smile. “The way you mixed spells to create the original potion, then piled on spells trying to fix it, is sort of the magical equivalent of… tying a knot in a piece of string, then locking the string in a bank vault, then filling the bank vault with glue, then encrypting the glue with a computer.” She paused. “Is that something a computer can do?”

“No,” said Sunset.

“Well, anyway,” said Princess Twilight, “That’s why we can’t just shrink Dash and Oval. The spells are all tangled up.”

“...Sorry,” muttered Sci-Twi.

“There’s no need be sorry,” said Princess Twilight. “It’s sort of impressive, actually - if it’s any consolation, you made very inventive and clever mistakes, which are the mark of a true prodigy. But solving this problem could take a while. I’ll be going back to Equestria; now that I’ve taken readings from Dash and Oval, I can do better work in my castle’s lab. I’ll keep you updated on my work, and I’ll let you know when I have something for you.”

“All right,” said Sunset. “We’ll keep an eye on those two while you’re away. And… we won’t try to do any more magic to them.”

“That’s probably for the best,” said Princess Twilight. She turned to the window, meeting the two giant eyes that were peering into Applejack’s second-story bedroom. “How about you two? Any questions?”

“Can we still fuck?” asked Rainbow Dash. She leaned forward, so that her huge magenta eye dominated the frame of the window. At a hundred feet tall, she and Oval had to lie on their bellies, side-by-side, in order to peer into the second-floor window. For the first time, they had some giant clothes to wear - another product of Princess Twilight’s magical help.

Sunset sighed. “It’s really reassuring that that’s your top priority,” she said.

“It’s important!” said Dash. “Do you trust the two of us to keep our libidos in check until Twilight figures out a cure? We gotta know if me and Oval Office need to be tied down or something.”

“You should be fine,” said Princess Twilight. “The enchantment we cast should dissipate the buildup of sexual energy and prevent it from causing any growth. But you can contact me if there’s any trouble - I’ll be staying close to the portal on my side, so I be here quickly if I’m needed.”

“All right,” said Rainbow Dash. “We’ll try and keep each other under control.” But her hand was already reaching over to squeeze Oval’s firm buttocks, and her heart beat faster as her fingers pressed into the curve of his perfect ass.

“That field comfy enough for y’all?” asked Applejack, leaning out her bedroom window. Sunset and the two Twilights were gone, driving back to CHS. “Y’all can stick around till Twilight fixes ya up… just try not to knock down any more apple trees if you can avoid it.”

“Sorry about all this,” said Oval Office. “We’ve put you through a lot of trouble already.”

Applejack sighed, slumping against the frame of the open window. She had the same physique as Rainbow Dash - toned limbs, huge rack, bubble butt - thanks to the growth magic she’d been exposed to, but she was only a little over six feet tall. “Don’t worry yourself none,” she said. “I mean, it’s frustratin’ to deal with y’all’s libidos, but we sorted out Sunset and Twilight by bein’ forgiving and understanding, and I figure that’s still the right play. Plus, I haven’t forgotten how horny I got back when I was growin’...”

“Well, I think we’ve calmed down since… last time,” said Oval.

Applejack scoffed. “You say that,” she said, “But I see Dash’s hand grabbin’ yer butt. The princess says y’all can fuck if you want, so go ahead and get it out of yer system if ya need to.”

“Is that really okay?” asked Oval Office. “Right in your backyard?”

“You’d rather I change my mind?” asked Applejack, with a smirk.

“Thanks, AJ,” said Rainbow Dash. “We’ll try to keep it down.” She let the hand groping Oval’s butt creep down between his legs, tickling his balls and the base of his cock. Oval shivered, squirming in Dash’s grip, and an awkward smile broke out on his face. Applejack, apparently not in the mood to watch passion unfold, closed the window and pulled the blinds.

“Looks like we’re alone,” said Rainbow Dash, cozying up to her boyfriend.

“Well, I don’t know if it’s possible to really have privacy when we’re this big…” said Oval.

“Well, when have we ever cared about privacy?” asked Rainbow Dash. “You and me, we fuck wherever we want, whenever we feel like it, and we don’t care who sees!” She lifted her hand from Oval’s crotch and stuffed it down the back of his pants. “I’m so glad Twilight made us these giant clothes,” she said. “Now I get to undress my big sexy boyfriend.”

“You can’t get enough, huh?,” laughed Oval.

“Of you?” said Dash. “Never. No matter how big you are, and no matter how much of you I get, I always want more.” She snuck her other hand under his shirt, caressing the dark blue skin of his abs. “Don’t you want more of your Dashie?”

“I do,” said Oval. “I’m just worried this is gonna turn into, you know… losing control, getting bigger…”

“Don’t worry, I’m not losing control,” said Dash. “This is just how a girl’s body reacts when she’s lying next to a hundred-foot-tall hunk who’s all hers.”

“So this is just… perfectly normal affection?” asked Oval. “Just two horny, sexy giants doing what comes naturally?”

“That’s right,” said Dash. Her fingers began to fumble with the fly of Oval’s pants, and Oval rolled over to give her easier access. “Just two… sexually mature… young adults… who are going to going to have earth-shaking sex.” She unzipped his fly and tugged his pants away from his waist. “Now wriggle out of those jeans.”

Oval tugged his pants down to his ankles and gingerly kicked them off, taking care not to drop them onto any apple trees. His pants were heavy enough to crush a few dozen trees if they happened to land on them, and he wanted to keep the destruction to a minimum.

He pulled at Rainbow Dash’s shirt, tugging it over her head as she raised her arms - and Dash, not being quite as cautious as Oval, brushed her arms over the tops of about twenty apple trees, shaking loose bushels and bushels of fruit.

With her shirt out of the way, Dash’s sky-blue breasts were out in the open. She had no need of a bra; magical breasts took care of themselves, standing firm on Dash’s chest, never sagging a bit. They were also irresistible; instead of moving on to Dash’s skirt, Oval buried his face between her breasts. Her tits were bigger than his head, and his face sank between them until he was enveloped in darkness and softness and the fragrance of her skin. He kissed her there, and then - steadying himself with both hands on her tits - he lifted himself back out of her cleavage, planting more quick kisses on the skin of her breasts as he ascended. He had her giggling now, as he kissed his way past her collarbone and up to her lips. “Do you feel like you’re losing control, Oval?” she whispered, wrapping her arms around him. “Do you feel like you’re gonna get real big and get all horny-crazy with me?”

“I feel a little like that,” said Oval.

“Well, that’s just called being horny,” said Dash. One of her hands went south, feeling up his twenty-foot cock through his boxers. “And I know how to fix that. I got the cure for horny right here.” She released his cock and grabbed him by the wrist, maneuvering his hand underneath her skirt. She pressed his fingers against her panties, right where her pussy had made it wet. “This’ll take care of you, baby,” she said, rolling her hips and grinding her pussy against his hand. “I’ll give you everything you need, all you gotta do is get out that big blue cock and fuck me.”

“You want this cock, huh?” said Oval, tugging down his boxers with his free hand.

“I think you know I do,” said Dash. “I want it every day, as much as I can get it. I wanna get drilled by that twenty-foot shaft.” Oval got his boxers off, and was about to set them gently aside when Dash snatched them from his hand and tossed them in the direction of the Apple family farmhouse. They landed on the roof - and fortunately weren’t quite heavy enough to do any damage. They just draped themselves across one side of the roof, one leg dangling down just far enough to obscure a second-story window.

“There’s my big sexy giant,” said Dash. She sat up and grasped his cock, giving the veiny blue shaft a firm squeeze. She couldn’t get her fingers all the way around it - not even close, really - and the feeling of that big dick in her hands sent a shiver of pleasure through her body. All this growth had left Rainbow Dash with an insatiable appetite for big things, and Oval Office’s cock was very big and very tasty. She leaned her head forward and wrapped her lips around the head of his dick, dragging her tongue across the tip.

She hadn’t intended to give Oval Office’s dick more than a brief kiss, but the taste of his cock was irresistible. As badly as her pussy needed to be filled, the feeling of that big, beautiful cock in her mouth was too good to give up. She almost decided to just suck him off, let him cum in her warm mouth, and swallow gallons and gallons of his load.

But when her hand strayed down to her pussy, she reminded herself of just how much she needed him down there. She couldn’t deny herself that pleasure any longer, so she gave Oval’s cock one last lick and raised her head. Kneeling, she pulled down her panties and her skirt and carelessly tossed them aside; they draped themselves across several apple trees as they landed, snapping a few branches but fortunately not knocking down any trees.

“Looks like Princess Twilight knows her way around a spell,” said Rainbow Dash, looking down at her naked body. “Normally I’d be growing if I were this horny.”

“Me too,” said Oval. “Growing’s nice, but it’s also nice not to worry about crushing everything.”

“I already miss growing,” pouted Rainbow Dash, “But being huge is a pretty good compromise.”

She crawled on top of Oval, grasping his cock again as she positioned herself. “You know,” she said, “I kinda hope Princess Twilight doesn’t figure out a cure, you know? I mean, who would want to give up being huge? Getting to play with a cock this big… I’d be nuts to give that up.” She hovered over Oval Office, dangling her tits in his face, stroking the base of his cock. “Come on, I know you agree with me, dude. Don’t you want your Dashie to stay big?”

“I do,” said Oval, almost hypnotized by Dash’s breasts, “But-”

“No, no buts,” scolded Dash. “Don’t spoil the mood, dude. You and me are big forever, Oval Office.” She lowered herself onto Oval’s cock, sighing happily as she enveloped his cock with her warm, slick womanhood. “You’re always gonna be my big man… so tall and strong, with those big muscles and that big cock…”

Rainbow Dash started to bounce on Oval, quickly ramping up the speed and intensity until her thrusts were pounding his butt into the ground, creating two craters beneath his glutes. “Oh yeah, this is how it’s supposed to feel,” groaned Dash. “You get tons and tons of boob bouncing all in your face… I get twenty feet of dick filling my pussy…” She went in for a kiss, probing Oval’s mouth with a hungry, swirling tongue, pressing her tits against his chest as her hips continued to piston up and down on his cock.

Pulling back from the kiss, she met his eyes. “So am I right, baby?” she asked breathlessly. “Do you love being big? You like having a big cock?”

“Yeah,” gasped Oval Office. “Yeah, I like it…”

“And how do you like me?” demanded Dash, slamming her hips full-force onto his cock. “How do you like your Dashie?”

“I like her big,” groaned Oval.

“Fuck yeah you do,” said Rainbow Dash. She grabbed Oval by the shoulders and rolled them both to the side. If Oval had been expecting it, he might have resisted, for the sake of Applejack’s trees - but before he could react, they were rolling, and Rainbow Dash, now on the bottom, was crushing apple trees into splinters under her back.

“Now fuck me, you giant hunk,” Rainbow Dash commanded. “Drill me with that twenty-foot cock, pound my pussy so hard that it shakes every apple off every fuckin’ tree…”

“You got it,” said Oval, and he thrust, slamming his cock into Rainbow Dash with earth-shaking force. He’d already learned that Dash could take a pounding - and, in fact, she needed it hard and fast. Not surprising, really; Dash was all about going fast, and the growth potion had turned her from a star athlete into a paragon of physical perfection. She could take everything Oval could give her - every thrust, every hard, thick foot of cock - and she’d always want more.

“Aw fuck, gimme that big blue cock,” groaned Rainbow Dash, writhing beneath the hundred-foot-tall giant who was thrusting into her. She clawed at the ground as her arousal rose, digging up apple trees and carving trenches into the soil. Eventually, her hands found their way back to one of their favorite spots: grasping and groping at Oval Office’s perfect buttocks.

Feeling himself getting close, Oval grabbed Dash’s tits and squeezed, sinking his fingers into the soft, firm flesh. Dash’s pussy pulsed around his cock, tightening and squeezing his shaft. He couldn’t hold himself back any longer, not with those powerful pussy muscles massaging his thrusting cock…

Oval came, erupting in Rainbow Dash’s pussy, shooting gallons and gallons at a time as his cock pumped a giant-sized load into her. Dash, feeling the first gush his the back wall of her pussy, tightened her grip on Oval’s ass and pulled him deeper inside. Her cunt tightened around Oval’s shaft - and then it tensed rhythmically, pulsing with a climax that reached mind-shattering heights. She squirmed helplessly beneath Oval, crying out, grasping at his ass. And all the while, Oval Office was thrusting hard as ever, shaking the earth, still shooting gallons inside Dash.

The two of them fell limp, panting and sweating, staring into each others’ eyes. Oval rolled off of Dash and snuggled up next to her. “You know what’s nice?” he said. “I’m satisfied. If we were still growing, I’d just want to fuck forever… but now I can just relax with you… and hold you…”

“Yeah, it is nice,” said Dash, draping an arm over Oval Office’s chest. “I don’t know if it’s better than fucking and growing forever, but… yeah, I like this.”

“Well, yeah,” said Oval. “I mean, when I was crushing on you, I wasn’t just thinking about how we would fuck all the time. I was imagining how we’d lie next to each other. Kinda like this.”

“That’s what you were fantasizing about?” scoffed Dash. “I only thought about the exciting parts of dating you, dude. I mean, cuddling is nice and all, but if you’re gonna daydream, why not daydream about awesome stuff?”

“Well, first of all, this is awesome,” said Oval, “and I’m looking forward to our relationship being more than just sex, now that we’re not constantly-growing, rampaging sex giants. Once we’re back to normal size, we can go on actual dates, and go back to school… I mean, there’s not a lot we can do at this size, if we’re not willing to destroy whole cities.”

“You want to go back to school?” said Dash. “I know you’re an academic decathlete or whatever, but being a sexy giant is way cooler than being a high school senior. If we stayed this size forever, we could get jobs hauling heavy loads for a construction company and just spend the rest of the time fucking.”

“Is that really what you want to do with your life?” asked Oval. “I figured you had some kind of, like, athletic ambitions.”

“Well, sure,” said Dash, “But even if I shrink back down, I don’t know if it’s, like, ethical for me to compete against people who haven’t been enhanced by magic potions.”

“I mean, we might just get shrunk down to our actual original size,” said Oval Office. “Not just the six-foot-three super-sexy versions of ourselves.”

Dash sat up, her giant tits jiggling with the momentum. “Aw man, I don’t want that!” she said. “I have magically perfect boobs, I don’t want to give these up no matter what! Maybe we can just get Princess Twilight to peel off every other layer of magic?”

“Yeah, maybe,” laughed Oval. Rainbow Dash lay back down, resting her head on his chest.

“Okay, I’ve been tossing some theories back and forth with Princess Twilight,” said Twilight Sparkle, raising the magic journal so that Dash and Oval could see it through the window of Applejack’s bedroom. “I told her that the two of you are doing a good job of just… lying down and not going anywhere for the last couple of days… but since we don’t know how long a cure’s going to take, that’s not a great long-term solution. We think there might be a way for the two of you to actually, you know, walk around and stuff. Without crushing everything in sight.”

“You want us walking around?” asked Oval Office, raising an eyebrow skeptically. “Don’t you sort of try and keep magic stuff secret?”

“Speaking personally, as an aspiring scientist,” said Twilight, “I’m not big on veils of secrecy. That sort of thing seems like it would make peer review pretty tricky. And in any case, you two already caused a lot of damage. You probably haven’t been watching the news lately, but… well, the two of you aren’t exactly secret anymore. And short of magically mindwiping everyone on the planet and selectively deleting data on servers worldwide, you’re never going to be secret.”

“I guess that makes sense,” said Oval. “So what’s the plan?”

“It has to do with those geode crystals,” said Twilight. “See, I theorized that your crystal, Rainbow Dash, has the ability to dampen the effects of air friction.”

“No, it just makes me go really fast,” said Dash.

“No, I mean-” Twilight waved one hand in a hopeless gesture. “I just mean… normally if you moved that fast, it would cause all kinds of problems with air friction, g-forces… not to mention the force of impact if you happen to run into something solid. But the geode takes care of all that, without you explicitly asking it to.”

“Huh, yeah,” said Rainbow Dash. “So what does that mean for us now?”

“Well, I think the geode can dampen the impact of your footsteps, and your weight in general,” said Twilight. “It can keep you from cracking the pavement wherever you walk, and probably keep you from smashing buildings on accident.” She dug the blue geode crystal out of her pocket. “I mean, you still have to be careful. Don’t go breakdancing in the center of town or anything.”

“And this won’t make the growth magic go out of control?” asked Oval.

“Princess Twilight says no,” she said. “Magic potions, magic tablets, those are potentially dangerous… but anything outside your body isn’t going to have any troublesome interactions. Here, Dash, take this,” she said, dangling the crystal from her fingers and holding it out through the window. Dash took it, and found that it was hanging from a strap that was about thirty feet long.

Dash hung the crystal around her neck and looked quizzically at Twilight. “What now?”

“Just think about… walking around without crushing stuff. Leaning on a building without breaking it. Just try to… want that. You do want it, right?”

“Yeah, of course,” said Dash. “I mean, smashing stuff is fun, but-”

“Yeah, try not to have thoughts like that,” said Twilight.

“All right,” laughed Rainbow Dash. “Okay, thinking about… not crushing stuff…” She placed a hand on Oval’s shoulder. “Will the magic work on him too?”

“It should,” said Twilight. “Love and friendship are good ways to make ‘bridges’ for magical effects…”

The crystal glowed, and Dash and Oval shared a prickling, tingling sensation, their hair rising as if affected by static electricity. When the glow faded, Dash stood up, looking at her fingers, trying to detect if anything was different. “So how do we test this?”

“Since we determined that the crystals can also be used to rebuild structures,” said Twilight, “Applejack agreed to let us use her barn to test it out. Go ahead and sit on the barn, see if your big butt turns it into splinters.”

Rainbow Dash laughed, walking over to the barn. “You’re lucky I like being told I have a big ass,” she said. “If it turns out I can sit on things without crushing them, I might just sit on you.” She straddled the Apple family barn, positioned her ass above its roof, and slowly lowered herself down, gingerly settling her weight down on it. And although a hundred-foot-tall girl should have been more than heavy enough to collapse the barn into splinters, the barn held its shape, only creaking slightly as Dash’s gigantic ass rested on it.

“Hey, it worked!” said Rainbow Dash. She leaned in the direction of the farmhouse, making eye contact with Twilight. “You wanna take me up on that offer?” she asked. I can sit this big ass right on top of you, Twilight. Clothes or no clothes, dealer’s choice! You’re cool with it, right, Oval?”

Oval Office just laughed. Twilight lowered her head, her face growing flush. “Anyway,” said Twilight, “You should be able to walk around without breaking everything in your path… but do be careful, okay?”

“This feels weird,” said Oval Office.

“Aw, you got butterflies in your tummy?” laughed Rainbow Dash, nudging Oval in the ribs with her elbow. “That’s just what happens when you go out on a date with a pretty girl.”

The two of them were almost in town. For them, the walk down the country road that led into the city was a casual stroll; walking arm-in-arm, their hundred-foot strides brought them easily to the edge of the city proper, where homes and strip malls gave way to gleaming glass skyscrapers.

And those skyscrapers weren’t the only things attracting attention with their size. As Oval and Dash strolled through increasingly populated areas, more and more people were staring up at them, craning their necks to see the bodies of the big, sexy giants in their midst.

“There’s a lot of people watching us,” said Oval.

“That didn’t bother you before,” said Dash.

“Yeah, but every other time, we were sort of…” his voice dropped to a whisper. “Hypnotized by horniness.” He waved awkwardly at a woman walking her dog. “But now that I’ve got a clear head I’m, like, super aware of being looked at.”

“Well, if it makes you feel better,” said Dash, “Everyone who’s looking at you is in awe of that big hunky body.” She grabbed his t-shirt and pulled it up, exposing his perfect abs. Oval yelped and swatted her arm away letting his shirt drop. “Come on, dude,” laughed Dash. “This body’s a feast for the eyes, and I don’t mind giving the little people a little peek. I know I’m the only girl with a big enough appetite to gobble up that yummy bod.”

“I don’t know if I want to go around flashing people,” said Oval, smoothing out his shirt.

“You should want to show off that body, dude,” said Dash. “And you should dare me to flash my giant boobies. She tugged the hem of her shirt upward slightly, exposing her belly button and a bit of sky-blue midriff. “Do you dare me?”

“Uh, nah,” laughed Oval.

“Well, think about it,” said Dash, letting her shirt drop. “So what are we doing? What do a couple of sexy giants do on a date?”

“Ooh, I know! I know!” said a little voice from the vicinity of Oval Office’s hips. He looked down and saw a little puff of pink hair wriggling out of the front pocket of his jeans.

“Pinkie?” said Dash. She and Oval stopped in their tracks and knelt to look this newcomer in the eye. “Why are you in Oval’s pocket?”

“Because your clothes don't have any pockets!” said Pinkie. “It's a very common problem with women’s fashion, and I don't see Rarity doing anything to fix it!”

“No,” said Dash, “I mean-”

“I guess I'm being a little hard on her, though,” said Pinkie Pie, seeming to ignore Dash. “I mean, she's just a high school senior, you can't expect her to make really big waves in the fashion world just yet, even if her Insta is super popular. She hasn't even gone to fashion school yet - oh! Did you hear? Rarity got that fashion scholarship she was after!”

“I didn't hear that,” said Dash. “That's really cool, but I was really asking why you're here at all.” Before Pinkie could speak, Dash raised her hand in a prohibitive gesture. “And just answer the question, don't go off into ‘why are any of us here?’ Or something that that.”

Pinkie shot Rainbow Dash an exaggerated scowl. “Dashie, please,” she said, “I'm not a hack.” She wriggled upwards slightly, resting her elbows on the stitching of Oval’s pocket. “I'm here because I'm an event planner, and clearly neither of you know how to have fun when you're a hundred feet tall!”

“So you're planning our date?” asked Oval.

“If you want it to be cool and fun, then yeah!” said Pinkie. “I'll just tag along in Oval’s pocket. You'll barely even notice me, except for when I occasionally bump into Oval’s giant penis!”

“So that's what that was,” said Oval.

“Yeah, that sounds good,” said Dash. “I trust you to plan out a fun date, and I mostly trust you not to get too fresh with my boyfriend’s huge dick.” Pinkie giggled. “So what are we doing first?”

“Well, you guys already ate, right?” asked Pinkie.

“Yeah,” said Oval. “Sunset’s got us on a diet of magically enlarged food.”

“Fun!” said Pinkie. “But what would be even more fun is shoveling tons and tons of normal-sized food into your giant mouths! So we're getting dessertat Sugarcube Corner!”

With a hundred-foot-high perspective, it was easy to spot the cupcake-topped facade of Sugarcube Corner. Oval and Dash cautiously stepped through the streets, planting their feet on empty sections of the road and carefully tiptoeing through backyards. There was the odd bit of panic here and there, but no damage; thanks to Dash’s magic, they left nothing more impactful than some shallow footprints in the grass.

Sugarcube Corner shared a parking lot with several other small eateries, and Dash and Oval knelt in that lot and carefully lowered themselves onto their butts. Oval reached down to retrieve Pinkie from his pocket, but she was already hoisting herself out and dropping to the ground. It looked like a perilous drop, but Pinkie landed easily on her feet and skipped towards the back door of Sugarcube Corner. She unlocked it, disappeared inside, and returned with a rolling rack of cakes - and then she hurried back inside and rolled out another one.

“I stole forty cakes!” said Pinkie. “JK, we just had a huge order that got canceled.”

“And we can just eat all these?” asked Oval.

“Yup!” said Pinkie. “It’s you or the garbage! Enjoy!”

Dash plucked a pink-frosted cake from the top rack of one of the carts. To her, it was just a tiny morsel, barely big enough to be called bite-size. She set in on her tongue, savored it for a moment, and then swallowed. “Mmm, good stuff,” she said, grabbing another one. “Hey Oval, open wide.”

Oval stuck out his tongue, and Dash dropped the cake onto it. “Mmm, I like it,” said Oval. “So are we gonna stop at one cake each, or…”

“Hell no, dude,” said Dash. “I’ve been a lustful giantess for a while, now I’m gonna try being a fuckin’ gluttony monster.” She carefully pulled a rack of four cakes from the cart and held it over her face, letting the cakes slide into her mouth. “Ahh, that’s a good feeling,” said Dash. “Eating inhuman amounts of food, while everyone’s watching… and I bet this body’ll stay perfect, no matter how many cakes I eat.”

“Well, these cakes are pretty tiny,” said Oval, lifting a tray from the cart. “But yeah, there are a lot of people watching, huh?” He held the tray up to Dash’s mouth and let her lick the cakes off of it.

“Yeah, we’re getting lots of attention,” said Rainbow Dash. She felt around on the parking lot behind her, testing the ground to see if there was space for her to lie down. There were a couple cars parked behind her, so she lifted them up and gently placed them in nearby parking spots, then lay herself flat on the asphalt. “Hey, little people,” she said, tracing her fingers along the parking lot, lightly bumping a few of the gawking humans with her fingertip. “What do you think of me?”

The response from the gathering onlookers was varied in tone and volume, and there was no way to tell what any individual was saying... but they seemed excited about the beautiful giantess with the rainbow hair. “Yeah, that’s what I like to hear,” said Dash. She reached over to the cake cart, grabbed another tray, and dropped another four cakes into her mouth. “I don’t even need to be good at anything!” she said. “I can just sit around and be huge and hot, and all these tiny people will be cheering my name!”

“How about this, Oval?” said Dash. “Instead of shrinking back down, we just build up a fan club of tinies who want to worship and serve us! I know some of these little guys would devote their lives to me if it meant they could bounce on my tits every now and then!”

“I don’t know about that,” laughed Oval.

“Come on, you don’t have to be jealous of a bunch of little dudes,” said Dash. She stretched her arms and arched her back, thrusting her tits upward. “You know you’re the only man who can satisfy me. Speaking of which, I bet there’s some tiny ladies who’d pledge their lives to you if it meant getting to play around with a twenty-foot-long you-know-what.”

Oval Office felt embarrassment start to gnaw at him as the crowd reacted to what Dash had said. But he couldn’t help but feel good about the attention he was getting; all those people were imagining his colossal cock - and even if they weren’t responding with desire, they were certainly in awe at the size of his member.

He felt the evening air on his chest as Rainbow Dash - once again - lifted his shirt and exposed his abs. “And how about this chest, huh?” she said, running her fingers across his perfect musculature. “I bet some of these girls would kill to oil up a set of giant abs!”

“Are you sure that’s what girls like?” asked Oval.

“I think you’re underestimating your raw sexual power, dude,” said Rainbow Dash. “And how are you gonna know how many tiny women you can snag if you don’t give it a try? Twilight could come up with that cure tomorrow, dude, and you’ll be back to normal. Live the giant life while you can, Oval!”

Oval took a couple more racks from the carts and licked up eight cakes in a matter of seconds; between the two of them, they’d nearly depleted the cakes Pinkie had rolled out for them. “I think we lived the giant life a little too much, back when we were smashing up buildings,” he Oval.

“Aw, just go for it!” said Dash. “It’s not cheating if the girl’s smaller than your cock. That’s a rule!” She reached out toward a group of young woman - but they all scampered away from her hand, huddling against a wall.

“You shouldn’t have mentioned how we smashed up the city,” said Dash. “Now they’re scared of us.”

“You two done?” yelled Pinkie, leaning out the bakery’s back door.

“Yeah, we finished off those cakes,” said Oval. “What’s next?”

“I’m so glad you asked!” said Pinkie. “You know how drive-in movies aren’t a thing anymore?” Dash and Oval nodded. “Well, the next best thing is outdoor movie nights in the park! How do you feel about the Cobalt Spark films?”

“Derivative,” said Rainbow Dash. “Basically the same thing as Daring Do, but with worse action and a less interesting protagonist.”

“Well, Cobalt Spark: Beyond is the only film playing outdoors tonight, so that’s what you’re watching!” She climbed up Oval Office’s pants and wriggled back into his pocket. “Come on, let’s go! Daggerhill Park!”

The part, by the standards of giants, wasn’t far - just a few miles away. Rainbow Dash and Oval Office crested the eponymous hill just as the movie was starting, and every single head turned to look at the earth-shaking giants as they strolled up and planted their butts on the high ground. They kept watching Dash and Oval, waiting for them to do something… but the two giants wanted nothing more than to watch the movie, and they sat still. The rest of the crowd, on folding chairs and picnic blankets, eventually turned back to the screen to watch the opening credits.

“So…” whispered Oval, as the first action scene unfolded, Colbalt Spark grappling from tree to tree as enemy agents pursued her. “The Daring Do movies are better? I haven’t seen them.”

“Oh man,” said Rainbow Dash, her voice low, “We have got to marathon the Daring Do movies. Pop some giant popcorn, curl up together…” Dash leaned on Oval, putting her head on his shoulder and her arm around his waist. “A quiet night in, just you and me…”

They sat there like that, watching the film unfold, their arms around each other. Dash’s breaths were long and slow - except for the moments when the action managed to make her pulse race, and she tugged Oval closer. Oval looked down and saw her chest - her enormous chest, topped with globes bigger than her head - rise and fall peacefully.

It was a long, wonderful moment of normalcy. it was still obvious that they were both giants - in the fading light of day, the crowd of tiny moviegoers was easy to see - but to Oval, it finally felt that they were a boy and a girl on a date. Watching a movie, embracing one another, not in the thrall of magically insatiable sexuality.

Of course, there was still perfectly ordinary young-adult sexuality to content with. And when Cobalt Spark tumbled, breathless and glistening, into the arms of a rakish rogue… Oval felt Rainbow Dash’s fingers stroking his thigh. He stayed still for the moment, letting Dash’s had glide over the denim of his jeans… until the tips of her fingers brushed the place where his cock lay beneath his clothes. Then he sighed, and shivered, and put his arm around Dash’s waist, tugging her closer.

Oval felt his cock start to get harder, growing plump inside his pants. In truth, his dick was always pretty prominent; even soft, it was thick and long enough that its outline was easy to detect. The issue was only compounded when it began to grow, snaking its way down his pant leg as it approached its full length of twenty feet. Everyone would see what he was packing down there, if they weren’t all looking at the screen…

A white-hot explosion erupted on the screen, cutting short the action between Cobalt Spark and her co-star just before it would have given the film an R rating. The light illuminated the whole crowd, and Oval saw just how many people weren’t watching the screen. Maybe they’d been looking at Dash and Oval the whole time, or maybe his sigh had drawn their attention, but about a hundred of them were watching Oval get his dick groped.

“Dash…” whispered Oval, trying to keep his voice low enough to not attract any more attention - probably a futile effort, since his tremendous size made it difficult to speak quietly.

“I know,” said Dash, in an equally low mumble. “There’s people watching, right?” She kept stroking his thigh, putting a little more pressure on his stiff shaft. “Come on, you know by now that doesn’t bother me. I’ve got the world’s hottest boyfriend, with the world’s biggest cock, and I’m gonna enjoy it no matter who’s watching.”

“Like I was sayin’, dude, you gotta live the giant life while you can,” Dash continued. “The spotlight is a great place to be when you’re extraordinary. I always knew I was awesome… and the sooner you realize that you’re awesome, the sooner you can enjoy being the center of attention.”

“I guess you have a point,” said Oval. It did feel kind of good, having all those eyes on him as his girlfriend lewdly stroked his inner thigh. If he’d been at his normal size, he’d have worried that someone would approach them and call them out for their inappropriate display… but now the two of them were unstoppable. No one could stop them from doing whatever they wanted. “But… what’s your plan?” asked Oval. “Are you gonna jerk me off right here?”

Rainbow Dash dragged two fingertips slowly over the length of Oval’s cock. “Nah, I don’t think so,” she said. “I just wanna get you good and horned up for later. Plus, it feels good to disrupt a screening of a Cobalt Spark movie. Like I said, they’re derivative.”

“So we’re heading to the lake?” asked Rainbow Dash. Once the film had ended, Pinkie had emerged from Oval’s pocket once again and pointed them east, where the calm waters of the nearby lake reflected the light of the rising moon.

“Yup!” said Pinkie Pie. “I heard a rumor about a lakeside bonfire! Well, actually, I started a rumor about a lakeside bonfire, and thanks to my reputation as a party authority, the rumor became true!”

“Wow, nice work,” said Oval Office.

“Thanks!” said Pinkie. “I’m having fun tagging along with you two. The best part was when Dashie was rubbing your penis, and I sort of got sandwiched between her fingers and your dick!”

“Huh, that was you?” said Dash. “I thought there was kind of a bumpy spot. I didn’t hurt you, did I?”

“Nah, I’m squishy,” said Pinkie. She leaned out of Oval’s pocket, peering eastward. “Now where’s that bonfire?” she muttered. “They should be lighting it up any second now…”

Beside the water, a small red flame came to life. From the perspective of the giants, who were a hundred feet tall and still a couple miles away, it looked no bigger than a burning match head, but it illuminated the shapes of several little people - and it showed Oval and Dash exactly where the party was.

In the darkness, Dash and Oval were able to get pretty close before the partygoers noticed them - but when they got close enough that the bonfire’s flame illuminated them, a cheer rose from the partygoers.

“Yes, finally! Finally!” said Rainbow Dash. “Finally some cool people who are excited to meet some sexy giants!” She knelt next to the bonfire, grinning at the people who were crowding around her. “What’s up, guys? I’m Rainbow Dash, and I’m fuckin’ huge!”

“Hi, everybody,” said Oval, kneeling beside Dash. “I hope it’s okay that we crashed your party.” There was a chorus of encouraging voices; apparently it was totally cool that they crashed the party.

“Oh man, you guys got beers!” said Dash. “Are you college kids? I’m gonna have a beer. I’m gonna have exactly one beer.” she pulled a bottle from an ice-packed cooler, pinching its neck between two fingers. “Can someone open this for me? I got giant fingers over here.”

A guy with a popped collar took the bottle from Dash, removed the cap with a bottle opener on his keychain, then handed it back to her. She lifted the bottle to her lips, poured its contents onto her tongue, and tossed it aside. “Woo!” she shouted, and the partygoers echoed her sentiment. “Oval, I’m so drunk!” she said, affecting an exaggerated slur. “Let’s make out!”

“You are definitely not drunk off of twelve ounces of beer,” laughed Oval - but he did as Dash asked, wrapping his arms around her and pressing his lips against hers. She fell backwards, and Oval followed, draping himself over her and probing her mouth with his tongue. Dash embraced Oval - gripping the toned ass she loved so much, and grinding her hips against his cock. From all around him, Oval heard more cheers; the spectacle of two amorous giants was, apparently, a welcome addition to this lakeside gathering.

From somewhere nearby, music began to play - powerful, pounding music, from surprisingly powerful speakers. Rainbow Dash pulled back from the kiss, looking into Oval’s eyes with an expression that was almost manic. “Oh shit, dude, let’s dance!”

Oval chuckled awkwardly. “I can’t really dance-”

“You got an awesome body now, dude!” said Dash, rising to her feet. She took his hand and pulled him upward. “Just move that hot body and I guarantee it’ll look good! Just, uh…” she looked down at the partygoers. “You might wanna give us a little space, okay? Just in case Oval herereally does suck at dancing.”

The little people backed off a bit, and Dash led Oval a few steps away from the bonfire. Someone turned up the music, and Dash started to dance, raising her arms, shaking her hips and waving her long rainbow locks back and forth. She shot Oval a few expectant looks, thrusting her jiggling tits in his face.

Hesitantly, Oval started to dance, doing his best to mimic Dash’s movements. Dash smiled encouragingly, dancing closer to him, thrusting her hips and shaking her tits to the pounding beat. Oval began to move a little more confidently, and he was certain he looked like a total doofus… but he didn’t care about that too much, and that seemed to matter more.

Both of the giants were bringing their feet down hard on the ground. The partygoers were keeping themselves at a safe distance, but they were struggling to remain standing when the earth was shaking so frequently. They danced with each other in the light of the bonfire, or they simply drank their beers, staring up at the sexy titans. Rainbow Dash’s rhythmically wobbling tits and ass got a lot of attention… but so did the outline of Oval Office’s giant cock.

It didn’t take long for Dash’s dancing to turn overtly sexual. She ground her hips against Oval’s, draping her arms across his shoulders, keeping intense eye contact as her body swayed. She bent at the knee, slinking downward, and Oval kept moving his hips as he waited for her to come back up.

But she didn’t come back up. She stayed down there, no longer really dancing… and Oval began to feel a tugging at his pants. Dash was unzipping his fly, pulling his pants down to his ankles - so Oval stopped dancing, and just let Dash do what she was doing. In a different state of mind, he might have voiced an objection, but at this point he was horny enough to just go along with it.

Dash pulled down his boxers and let them fall to his ankles - and when they fell, they sent out a gust of air that made the bonfire dance. Dash stared adoringly at Oval Office’s cock, holding the base of the twenty-foot shaft in her fingers - and shooting a look in the direction of the tiny partygoers, proudly showing off the giant dick that she had the privilege of sucking.

And then she started to suck it, kissing the tip and then embracing it with her plump lips. Cradling his balls with her fingers, she took him deeper - five feet of cock, then ten feet… he looked down and saw her eyes staring up at him, and her lips smiling around a mouthful of cock. As she maintained eye contact, she dragged her tongue over the underside of his cock, caressing the bare skin of his shaft and making him moan and shiver.

“Oh man,” moaned Oval, weaving his fingers into the hair on the back of Dash’s head, “Dash, oh my God... “ Dash became bolder, taking more of his dick, deep-throating his twenty feet of dick. The tiny partygoers around their feet were impressed with Rainbow Dash’s blowjob prowess, woo-hooing as they saw the bulge of Oval’s cock showing in her throat.

Oval looked down at the tiny onlookers, reading the awed expressions on their faces. Dash had been right - it was nice to be appreciated for his size and virility, even if it was just by a bunch of drunk college kids. Oval didn’t want to be scary, like he was back when he and Dash were smashing up buildings… but he did enjoy the sound of little people cheering him for getting a blowjob.

And the blowjob itself wasn’t half bad either. Oval felt his nuts pulling up against his body, readying themselves to release gallon after gallon of spunk. And Dash was greedy for it, her throat making wet noises as she eagerly sucked his shaft. It wasn’t surprising that an appreciative crowd was bringing out the best in Rainbow Dash; she was at her best when she was in the spotlight, and now she wasn’t just sucking a dick. She was performing. She was going to prove she was the best at blowjobs. She was sucking the biggest dick and she was going to swallow the biggest load…

Oval came, shooting the first few dozen gallons right down Rainbow Dash’s throat. Dash leaning away from his body, sliding his cock out of her throat, letting his next spurt land on her tongue - and then she pulled away entirely, popping his cock out of her mouth and gripping the base of his shaft. Laughing, she angled his dick to the side, aiming it down at the little partygoers. Before they could react, the first giant jet of cum shot in their direction; it only landed between two clusters of people, leaving a thick white streak on the ground.

The drunken college kids had been excited to watch a giant blowjob, but they were a little less happy to be dodging gigantic spurts of cum. Dash giggled cruelly as she aimed Oval’s cock, trying to nail her tiny fans with each gush of spunk that shot through his shaft. Eventually, she scored a hit, knocking a couple girls to the ground and glazing them in her boyfriend’s cum.

With Oval’s orgasm winding down, Dash turned his cock towards the bonfire and let it shoot one last spurt, extinguishing the roaring flame. There were now shouts of anger coming from the little people, but Rainbow Dash just laughed - and Oval, leaning down to pull his pants back up, joined her in laughter. “Looks like the party’s over,” he said.

“Yeah, let’s get out of here,” said Dash. She took his hand and started to walk in the direction of Applejack’s farm. Oval gently patted his pocket, confirming that Pinkie was still there, and went along with Rainbow Dash.

“So you just… can’t fix it?” asked Oval Office. “Like, ever? At all?”

It was a lovely day on Applejack’s farm, despite the disappointing news. Sunset and the two Twilight Sparkles were once again seated in Applejack’s bedroom, facing the window and addressing the two giants. Princess Twilight, front and center, sighed and threw up her hands. “I know it seems like it’s too soon to give up,” she said. “It’s been less than a week, but I did the math - with a lot of help from Twilight and Sunset, and-”

“Wait,” said Rainbow Dash. “There’s math in magic?”

“There’s math in everything,” said Princess Twilight. “Anyhow, the spells in your bodies… the way they’re knotted up, you would need to precisely dispel their components, in exactly the right order, or you’d just make it worse. And mathematically, there’s so many possible sequences and no way to know which one is correct. It’s not impossible to cure you, but it’s… well, it’s just not going to happen.”

“Well, to be honest,” said Rainbow Dash sheepishly, “I did kind of want to stay big… so we just stay this way?”

“Not quite!” said Twilight. “Thanks to the your geode crystals, there may be a way for you to channel and control the magic inside you. Casting spells through a crystal actually isn’t too different from casting them through a horn, so I was able to develop and test a spell on my side of the portal. Once Sunset and Twilight cast it, the two of you should be able to control your sizes.”

“Wow, cool,” said Oval.

“‘Wow, cool’ is right!” said Sci-Twi. “I learned a ton about magic this week… although I’m still pretty far from Princess Twilight’s level. If I try any solo projects, I’m still liable to mess them up as bad as I did this one.”

“Don’t be so hard on yourself,” said Sunset Shimmer. “Don’t forget, all this is Rainbow Dash’s fault.”

“Yeah, yeah, we’ve all done terrible things,” said Dash, rolling her eyes. “Except Oval.”

“It’s true,” said Oval, “I am free of sin.”

“Okay, go ahead and cast the spell,” said Princess Twilight. “Dash, you should feel your crystal resonate…”

Sci-Twi and Sunset came to the window and closed their eyes in focus, and the crystals hanging around their necks began to glow. Pulses of orange and purple light flowed through the window and enveloped Dash and Oval - and then it faded.

“There you go,” said Princess Twilight. “Just sort of… try to change your size. It’s hard to describe how, but just... try.”

Oval concentrated on the thought of getting smaller, picturing himself at his normal size… and he saw Applejack’s house begin to rise. He lost ten feet of height in an instant, then shrank ten more feet just a bit slower… and by the time he was down to twenty feet tall, the mental effort of shrinking any further got to be too much for his. There was a limit, some sort of wall he was bumping up against; even with some control of the size-changing magic, he couldn’t be entirely rid of it.

At his hundred-foot height, he’d been kneeling to get his head level with the second-story window. Now he stood, twenty feet tall, looking at Sunset and Twilight through the open window. “I think that’s as small as I can get,” he said. “But hey, it worked!”

But Sunset and Twilight weren’t meeting his eyes. Instead, they were staring upwards at something behind him - and it wasn’t difficult to guess what it was. When Oval turned around, it wasn’t Dash’s face he saw, but her shoelaces - and so he looked up, and up, and up.

“Oh man, I had a feeling you were gonna try gettin’ small first!” said Dash, grinning down at Oval. She’d doubled her height, looking down at the farmhouse from two hundred feet up.“I bet you were thinking about going back to school, sleeping in a bed, all the boring stuff you can do when you’re small! Come on and get big so we can be awesome together!”

“Seems like it works in both directions,” said Sunset. “Are you both feeling all right? Not, like, super sexually aroused or anything?”

“Nah, just the normal amount,” said Rainbow Dash.

“Oval Office, can you get any smaller?” asked Sci-Twi.

“I don’t think I could get too much smaller than this,” said Oval. With some effort, he shrank down a single foot. “Yeah, that was kinda hard to do.”

“More importantly, how big can we get?” asked Rainbow Dash. “Growing this much was easy, so I bet I could get way bigger.”

“The important thing is that you can control it,” said Princess Twilight. “And it’s also pretty important that you don’t smash up Applejack’s farm any more than you already have. I doubt I can stop you from testing out your maximum growth,” she sighed, “But if you’re going to, maybe do it somewhere secluded.”

Rainbow Dash groaned. “Yeah, I guess Applejack has been pretty patient with us,” she said. “All right, I won’t get any bigger.” She dropped to her knees, and Oval stumbled to keep his footing as the ground shook. She leaned forward, bringing her face closer to him - and, likely on purpose, dangling her tits right in his face. “So are you about as small as you can get, dude?”

“Uh, maybe,” said Oval. “As long as we’re putting it to the test, I’ll really try and shrink as much as possible.” He closed his eyes tight in concentration, focusing on the thought of becoming small, of compressing himself down… it wasn’t easy, but he felt himself slowly creeping downward. He felt like he was hitting a wall, a hard limit that he wouldn’t be able to go beyond… but he powered through, straining himself mentally and physically, willing himself to grow shorter.

And then - just for a moment, there was a feeling of painful constriction all over his body. It was his clothes, Oval realized, growing tight - but that made no sense. First of all, his clothes had been changing size with him just fine… and secondly, he was shrinking. If his clothes weren’t changing with him, then they should be getting too big for him, not too small.

But after that brief moment, it no longer mattered - because his clothes exploded off of him, first tearing at the seams and then tearing everywhere. They fell off him in shreds, leaving him completely nude. He opened his eyes, and before looking down at himself he looked up at Rainbow Dash, whose eyes were very, very wide.

“Oh my God, dude,” said Dash. “Dude, oh my fuck. You’re a little… blue… beast.”

Oval looked down at himself and saw a new and unfamiliar body. The first round of growth had turned him into a hunk, with prominent muscles that looked very good naked. But those muscles, from head to toe, had grown bigger, bulging from every limb. He didn’t have the outlandish, exaggerated physique of a career bodybuilder, but he was huge - even though he’d managed to shrink himself down to twelve feet tall.

And then there was the matter of his cock. While his muscles might not have been completely outrageous in their size, his cock definitely was. It was four feet long, fully a third of his height and thicker than his hips, with dangling blue balls bigger than his head. “Holy shit,” he whispered, grasping the base of his shaft with both hands. It started to rise, throbbing slightly as it stiffened.

“Dude…” gasped Rainbow Dash, a droplet of drool forming on her enormous lips. “Hooooly shit…”

“What is it?” asked Sunset, craning her neck to try and see what Dash was reacting to. “Can you turn around for me, Oval?”

Oval turned around, pointing his rising cock at the second-story window the girls were looking out of. The two Twilights, almost in perfect unison, blushed and put their hands to their faces… and Sunset’s jaw simply dropped. “Wow,” said Sunset, almost laughing. “That cock is… really something.”

“This is.. a little unexpected,” said Princess Twilight, “But I think this is just a different… expression of the control you have over your growth. You should be able to change the size of different body parts individually; I’m guessing that it only happened by accident because you were reaching the lower limits of your size.”

“Wait,” said Rainbow Dash. “So I can, like…” She balled her hands into fists and hummed softly - and Oval, still facing the farmhouse, felt something big, heavy, and soft pressing against his back. Soon there was intense pressure on his back, enough that he would have been knocked flat if he weren’t a twelve-foot tall wall of muscle. He turned around and discovered an even larger wall of flesh - Rainbow Dash’s tits, growing bigger, stretching her green t-shirt to its absolute limit. Her breasts were the only part of her that was growing - unless you counted her smile, which was growing wider every second as she watched her tits expand.

Her shirt tore down the middle, and her colossal blue tits bounced out and slapped down onto the ground. They were individually three times bigger than her head now, and each far bigger than Oval Office’s whole body. “Oval…” said Dash, her breasts rising and falling with heavy breaths. “How do you like my giant tits?”

Oval leaned into her tits, sinking a foot and a half into her cleavage as her still-growing breasts pushed farther out from her body. He pressed his hands into their softness, groping and stroking the smooth surface. “I like them a lot,” he said.

“Well, I like that big hard cock,” said Rainbow Dash. “I like the way it feel between my boobs, Oval. How about you move those strong hips and fuck these giant titties, big guy?”

“Well, this was foreseeable,” said Sci-Twi, rolling her eyes. But although her tone suggested disapproval, she didn’t move away from the window, and neither did the other two girls. All three of them stumbled a bit when Dash’s boobs, still expanding, bumped against the side of the house, pinning Oval against the outer wall. Dash chose that moment to stop enlarging her tits, right at the point where any additional growth would have smashed in the wall of the house.

“Well, go for it,” said Dash, reaching a giant finger down to stroke Oval Office’s hair. “I got one hand between my legs, babe, and the one thing I really, really want is to feel that giant cock fucking my monster boobies!”

Oval was pinned between Rainbow Dash’s huge sky-blue tits, squeezed tight on both sides by the big, firm globes - and with the strength in his body, he probably could have wriggled free. But this was a nice place to be. He thrust his hips, sliding his four-foot cock deeper into her cleavage, feeling the firm flesh embracing his shaft. He pulled back and thrust again, quickly building a rhythm.

“Ooh, that’s nice,” whispered Dash. “These tits are super sensitive, and it feels real good to have a big fat dick sliding between them.” Her body was bucking back and forth as her fingers went to work on her pussy, and the motion of her tits was shaking the farmhouse down to its foundations. “How does that big cock feel, big guy?”

“Feels good,” said Oval, pumping his hips with greater speed and force. “I can’t believe how big my dick is…”

“Wanna make it bigger?” suggested Dash. “We’re supposed to test how well we can control our growth, right? How about you give yourself a few extra feet to play with?”

“Yeah, sounds good,” Oval gasped, and he focused his thoughts on growing his cock. He couldn’t see his dick - Rainbow Dash’s boobs had completely enveloped it - but he could feel it growing, adding on inches, thickening, and thrusting deeper. “I’m growing,” he groaned. “Fuck, it’s huge…”

“Yeah, make that cock big,” said Dash. “I wanna feel that thick blue dick, baby… I want you to shoot a big hot load deep between my boobs… I’m gonna cum so hard when you shoot that hot spunk, Oval. Are you gonna give me what I need, Oval?” she asked, leaning her colossal face down over him. “Are you gonna grow a big long cock and shoot a big sticky load?”

“Yeah,” said Oval. “I’ll give you everything I’ve got…” His hips were pumping with as much force as he could put behind them, slapping against Dash’s tits with each thrust. His cock, now six feet long and nearly as thick as his waist, was throbbing powerfully, readying itself to shoot, overloading his body with pleasure. His cock was enormous, so out of proportion to his body, and the pleasure signals it sent to his brain were so powerful that they nearly overwhelmed his senses. The onrush of climax was brutally intense, leaving him wordless, breathless as his body jerked and his cock erupted.

A gallon of thick, hot spunk shot from his tip, splattering the interior of her cleavage. His cock throbbed at a rapid pace, pumping a gallon at a time, drawing a huge supply of cum from his tremendously enlarged nuts. It was a different experience from just being big all over; having a cock and balls so out of proportion with his body turned the orgasm into a physically overwhelming experience, and he thrashed and writhed inside Dash’s cleavage as his cock shot again and again.

“Oh, that feels nice,” said Rainbow Dash, her fingers frantically flicking at her clit. “Lots and lots of hot sticky cum, all over my big giant boobs, and you just keep cumming and cumming… ohhh, I’m getting close too… gonna cum...”

Dash gasped and cried out as she came, and her bucking body made something inside the farmhouse crack loudly. Oval’s body bounced along with her tits, his cock still spurting cum, filling her cleavage with gallons and gallons of jizz. Groaning, he slumped down onto Dash’s tits as his climax ended, his cock weakly pumping the last of his load. Dash soon settled down as well, leaning her kneeling body forward, resting most of her weight on her enormous tits.

“Well, they can control their size,” said Princess Twilight. “Self-control might be a problem, though.” There was another cracking sound from somewhere in the house, and she reflexively flinched. “Girls, maybe you wanna use your crystals to keep this place from collapsing?”

“Look, I understand your concerns,” said Sci-Twi, “But you’ve gotta go to school!”

“Do we, though?” asked Rainbow Dash.

“Yes, you have to go to school!” said Sci-Twi. “Everyone has to go to school!” There was something intense, almost manic, about her insistence - as if pushing back would cause her to start yelling, or maybe burst into tears. She clearly cared a great deal about education; if Twilight Sparkle wanted you to go to school, chances are she’d find a way to make you.

Oval and Dash had walked to school at a comfortable height of fifty feet, and were contemplating the prospect of shrinking themselves down. “How small do we have to be before we can fit through doors and stuff?” asked Oval.

“Twelve feet should do it,” said Twilight. “I mean, you’ll have to crawl a lot of places, but you’ll be okay!”
Oval and Dash shared a look, sighed, and focused on shrinking themselves down. The first ten feet were easy, but after that it got harder and harder to make themselves smaller. After twenty feet, they were running up against “the wall,” finding it difficult to shrink any further - but they fought through it, and they shot down to twelve feet.

But just like last time, all that size couldn’t be completely suppressed. Oval spend a fraction of a second at his normal proportions, and then his body swelled with muscle from head to toe. And his cock exploded in size, growing back to four feet long. His clothes should have shredded themselves again - but thanks to the enchantment that Princess Twilight had instructed Rarity in casting, they changed to fit him perfectly. His shirt widened, becoming attractively snug on his muscular arms… and his jeans developed a generous bulge in the front. They didn’t hide his coiled-up cock, but at least they covered it.

And Dash, going for her minimum size for the first time, underwent a slightly different change. Her muscles, already impressively toned, didn’t get any bigger; responding to subconscious desires, the growth shot into her curves - her ass swelled into a bubble that stuck out three feet behind her, and her tits ballooned to nearly the same size. And her clothes kept up with her growth, stretching to embrace her new assets.

“Well, hey!” said Twilight. “You look great!”

“Well yeah, obviously we look great,” said Rainbow Dash. “We’ve looked great from day one! But how are we supposed to go to school like this?”

“Huh, usually I’m the self-conscious one,” said Oval Office.

“It’s not that,” said Dash. “Gonna have a hard time squeezing these boobs through a door… not to mention this thing.” She slapped her ass, and it wobbled from the impact.

Twilight approached Dash’s backside, raised her arms, and placed them on either side of her rump. “I think you can juuust make it,” she said. “As long as your butt is soft enough…” She squeezed Dash’s giant cheeks, compressing the bubble as much as she could. “Yeah, this seems good!”

“You’re not gonna squeeze my boyfriend’s crotch like that, are you?” asked Dash, looking at Twilight over her shoulder.

“No, that would be counterproductive,” said Twilight. “The softer his penis is, the easier it’s going to be to squeeze it through a door.”

Oval shrugged. “All right, let’s give it a try.” He got on his hands and knees, smiling apologetically at the other students - the normal-sized ones - who were trying to make their way into the school. They parted, giving him plenty of room, and he made his way - crawling, sideways - through the middle set of double doors. His dick got snagged on the edge of the doorframe, and he wriggled through, crouching on the other side of the door. “All right, you try,” he called out to Dash.

“Ugh, this is not gonna be easy,” groaned Dash. She crouched and turned her body, working her shoulders through the doorway. Her progress halted abruptly when her boobs hit the doorframe, and she grabbed her tits, squeezing them tight against her chest as she wiggled through.

“You need any help?” asked Oval.

“Oval, you know I love it when you grab my boobs,” grunted Dash. “But I think this is gonna go better if I don’t have anyone getting in my way.” She got her tits through, only to get her ass stuck in the same way.

“Want me to push?” yelled Twilight from outside.

Dash scowled and wriggled her body. “No! I’m… fine.” She flexed her glutes, trying to shift her butt around. “Dammit, being huge is supposed to be fun,” she grumbled. “Stupid door’s making me feel bad about having a giant butt…”

She worked herself through the door and slumped against the lockers, right next to Oval Office. “Okay, now you can grab my tits,” she said, leaning her body against Oval.

“After school, maybe?” said Oval.

“Ugh, that’s a long time to wait,” said Dash. “At least we have a lot of classes together.” She reached her arm around him and gave his butt a little squeeze. “See you in second period,” she said. “I’m gonna crawl off to my ‘math for airheads’ class. Hopefully we won’t be talking about any really big numbers, or I might start to think about growing…”

Oval gave her a kiss on the cheek, and Dash giggled happily. “See you later, baby,” he said, and set off towards his first-period class.

Class was… a little awkward. The students of CHS were more accepting of strangeness than the average high school students - having already lived through magic demons and mind-controlling sirens, they were pretty willing to accept a couple of giants. And if it had just been their size, it might not have been all that awkward. But they also had distractingly large assets - Oval had his enormous crotch bulge, and Dash had her colossal boobs and gigantic ass.

Spending the first period apart, Oval and Dash were each the solitary focal points of their classmates’ disbelieving stares. Oval tried to be his usual self - casual, friendly - but he was a 12-foot-tall, hulking giant leaning against the back wall of the classroom, and it seemed like there was always at least one pairs of eyes taking a sidelong glance at the unreal spectacle that was his body. Oval couldn’t gauge everyone’s reaction, but he noticed a few girls biting their lips as they eyed up his bulge. A four-foot cock was too much for any of them… but they sure looked like they wanted a closer look.

Dash had it even worse. The boys in her class weren’t particularly good at hiding their interest, and she spent most of the class scowling at gawking guys. This wasn’t any fun - not only was Oval not there with her, she just didn’t feel powerful like this. When she was out on the town, stomping around, waving her tits in every direction, she felt like a goddess… but here, cooped up in a classroom that barely accommodated her huge, beautiful body, being big just felt like an inconvenience.

So it was a relief when Oval and Dash reunited for second period. They were still getting lots of stares - maybe more, now that the students were seeing both members of the giant couple. With a little imagination, anyone who saw them could easily imagine what it would be like to watch them fuck.

They both took a seat on the floor, leaning against the back wall of the classroom, leaning affectionately against one another. The history teacher probably should have told them to put some distance between themselves, and a flicker of doubt across his face suggested that he was considering it… but he found the giants a little too intimidating to confront.

“I missed you,” whispered Oval, during a lull in the lecture.

“Me too,” said Dash, wrapping an arm around Oval’s waist. “That’s the longest we’ve been apart for a pretty long time.”

Oval smiled. “And you haven’t gotten sick of me yet.”

“How could we ever get sick of each other?” asked Dash. “Every day we’ve spent together has been exciting, and we’re both…” She shot a glance toward the front of the class, where the teacher was starting up some kind of educational film. That seemed to be grabbing everyone’s attention - so she turned back to Oval with a grin. “We’re both constantly changing… getting better…”

Her breasts, already huge beyond reason, started to swell. She leaned more of her weight on his body, placing her growing tits in his lap… then she grabbed his arm and slapped his hand against her ass, letting him feel her growing cheeks.

“Uh, just how big are you planning of getting?” whispered Oval Office. “This could get to be… to much…”

“You’re one to talk,” said Dash. “I feel you growing too.” She shook her shoulders, making her tits bounce in Oval’s lap.

“Yeah, but… not on purpose… and not, like… magically…” He grunted uncomfortably as his stiffening cock uncoiled inside his pants. This could be a real problem - his jeans had grown big enough in the crotch that they could hold his four-foot cock, but if it stiffened… well, he didn’t know if his pants could deal with that.

“Well, I’ll stop growing if you stop growing,” teased Dash. She leaned her body forward, settling the full weight of her growing tits onto Oval’s crotch.

“Come on, Dash, eventually someone’s gonna turn around and see us,” Oval grunted, shifting his hips to try and keep his cock contained. “If we don’t… mmh… oh shit-”

His dick, fighting to grow to full hardness, strained against the denim of his jeans - and his boner punched through the material, tearing apart the crotch. The sound of it filled the classroom, easily overpowering the volume of the educational film. Everyone in class turned to look - and although Dash’s boobs were covering his entire crotch, and thankfully concealing his dick, it was pretty obvious that something had happened.

“Uh, I gotta go,” said Oval. “Bathroom!” He rolled over, covering his crotch, trying to keep his dick out of anyone’s line of sight. Fortunately he was close to the exit - and getting his cock through the doorway was actually easier now that it was erect, rather than coiled up in his jeans.

But Dash, who followed him to the door, didn’t have as easy of a time. With her body turned sideways, her head and shoulders got through just fine, but her tits - their circumference a couple feet bigger than the last time she’d gone through a door - took up the entire door frame, wedging her tight. “Fuck!” she swore, wriggling helplessly. She reached her arms out and looked pleadingly at Oval. “Okay, this time I do need help!”

“Okay,” said Oval, taking both of her hands. “Can you shrink your boobs down? You should be able to get them down to where they were before…”

“I’m trying,” said Dash, “But it’s hard to focus… I’m pretty horny right now, and it doesn’t help that my boobs are getting squeezed… Just pull, dude, just get me through the door and we’ll sort it out later.”

Oval pulled, and Rainbow Dash grunted, biting her lip as a hot blush bloomed on her face. “Fuck… so weird… how good this feels…” she grunted. She turned to meet Oval’s gaze, her eyes flickering towards his musclebound arms. “Damn, dude, you’re strong,” she said. “Tug me out of here so I can feel up your body.” Oval summoned up the immense strength in his arms and pulled, and Dash’s tits squeezed through the door - but her body got stuck again when her ass wedged in the doorframe.

“Damn it,” muttered Dash. “Okay, one more pull, get my giant ass through the…” her face twisted in confusion, and she looked backwards. “Aw dammit, I feel hands on my butt. They’re pushing. They’re trying to help… Come on, help me out here.”

Oval braced himself, preparing to pull Dash’s ass through. “What’s wrong?” he teased. “You don’t like having a lot of hands on your ass?”

“I don’t like being helpless,” said Dash. “Dammit, I could just grow to a hundred feet tall and bust out of this school…”

“No, I got you,” said Oval. He pulled, and yanked Rainbow Dash free - then his hands immediately shot to his crotch, covering his naked dick. “Okay, what’s the fastest way out of here?” he asked. “I’ve gotta ditch and get a new pair of pants, and you’ve gotta… calm down until you can shrink your boobs and your ass.”

“Nah, if you’re ditching, I’m ditching,” said Dash. “Let’s sneak out through the gym, okay?”

The two of them crawled together through the halls - which were mostly unoccupied, since class was still in session. The entryway to the gym was a generous set of double doors, so they made it in without a problem - and they could finally stand up straight, thanks to the high ceilings. They stretched their arms over their heads, groaning with relief. “Ah, feels good,” said Oval. “All right, I guess I’ll just head back to Applejack’s farm until someone can enchant a new pair of pants for me.”

“Yeah, these ones are busted,” said Dash. She took hold of the waistband of the jeans and yanked on them, tearing the seams until the whole garment fell to the floor in two pieces. “Might as well just go naked, right?”

“Dash!” yelped Oval. “Great, now I’m naked,” he grumbled.

“Hell yeah it’s great!” said Dash, smacking his perfect blue butt. “I want you naked as much as possible. Besides, weren’t those pants uncomfortable? You had to keep your dick caged up like that… wearing skirts is much more freeing!” She turned around and shook her ass - only about a quarter of which was covered by her plaid skirt. Her pink panties were holding on, covering her huge sky-blue ass, but they were straining, stretched thin. “See? No matter how big my butt gets, my skirt doesn’t get in the way.”

Oval couldn’t help but stare at Rainbow Dash’s wiggling ass. “So are you saying I should wear a kilt, or - woah!” Dash suddenly enlarged her ass, and her cheeks closed the distance between her body and Oval’s cock. Now his hard cock was wedged into her crack - or at least, as far inside as it could get while she was still wearing panties. “Dash, if your butt gets any bigger, you’re gonna have a hard time getting out of the gym.”

“Well, I’m not thinking about getting out of the gym right now,” said Dash, grinding her butt against his cock. “I’m thinking about getting my butt big… and then getting my big butt fucked.” Her ass swelled again, so that it protruded six feet out from her backside, and she fell to her knees. “Oh man, I got a big, heavy butt…” she moaned. “You wanna come over here and fill it?”

“I don’t think my dick’s long enough to get all the way in,” said Oval. His cock was still stiff, four feet long, dripping precum, starting to throb as Dash’s ass rubbed against it.

“So make it bigger,” Dash said. “Just make that cock long and thick enough to fuck this big… round… butt!” She grew her butt bigger, big enough that her enchanted panties finally gave out and tore themselves to shreds. Now that her asscrack was unguarded, her grinding motions started to work his cock deeper into her butt.

“Fuck,” gasped Oval. “All right, let’s do this.” He enlarged his cock, and it penetrated deeper into Rainbow Dash’s giant ass, parting her big round cheeks until it arrived at her tight, puckered asshole. “All right, you want it?”

“Yeah I want it,” said Dash. “Oh fuck, I can already feel how big you are, Oval… stick it in me, grow big, fuck me deep…”

Oval enlarged his cock by another foot, simultaneously thrusting his hips. He penetrated Dash’s asshole, and she cried out in pleasure, groping at her giant tits as Oval thrust deeper. “Fuck yes, dude,” she groaned. “I love it when you go deep, baby. Let me give you… even more ass to fuck.” She made her ass grow bigger, so big that Oval was halfway inside it, his head barely above the top of its 10-foot circumference. He grew his cock again, keeping himself inside her - and it grew in girth at the same time, now two feet thick as it pounded Dash’s ass.

“Ohhh my gawwd…” groaned Dash. “Oval, you’re huge, you’re stretching me so good, you’re so deep in my huge round butt… I could keep right on growing… force you to make your cock bigger and bigger…”

“Come on, don’t make me work,” said Oval. “I don’t wanna outgrow the gym or crush the school… I just… really need to cum.” He thrust with all the strength in his hips - which, thanks to his giant muscles, was a lot. Dash let out a wordless, broken moan when the impact hit her - and then another, and another, as Oval thrust again and again. “Just let me cum, Dash… I know I can make you cum too…” He made himself a little bigger, penetrating deeper and stretching her ass wider. “Are you close, Rainbow Dash?” he grunted. “Is my big dick about to make you cum?”

“Oh fuck, yes, yes,” gasped Dash. “Ride my ass, pound me stupid, make me screeeam… Oh fuck, Oval, Oval!” Her whole huge body shook as she came, and Oval Office was surrounded on both sides by walls of wobbling blue butt-flesh. “Oval, you gotta cum for me, fill up my fuckin’ ass, flood me with cum…”

“Yeah, I’m close,” Oval grunted, digging his fingers into the flesh of Dash’s cheeks. “Oh shit, this is gonna be huge… gonna shoot a big hot load outta my giant cock… oh fuck, I hope you’re ready baby, it’s so much fuckin’ cum-”

Oval Office’s whole body jerked as the first spurt of cum burst from his cock, rocketing from his tip and splattering against the inside of Dash’s ass. He flailed as his cock pumped again and again, barely holding onto Dash’s ass as climax rocked his body. Groaning, he fell backwards, and his cock popped out of her butthole, splattering her asscrack with thick sticky spunk. By the time he was done coming, Rainbow Dash’s ass was dripping with spunk, sitting in a thick white puddle.

“Fuck,” gasped Rainbow Dash. “Going to school was almost worth it… just for the chance to ditch class and get my ass fucked in the gym. So what now?”

“Well, I’m still pantsless,” said Oval, leaning his body against Dash’s left asscheek. “Which was the original problem. So I guess I’m going back to Applejack’s farm.”

“You guess you’re going there?” teased Dash. “You don’t sound that excited, dude. Are you open to suggestions? Because what I wanna do is go some wide-open place and get big.”

“I had a feeling that’s what you were going to say,” laughed Oval.

“Well yeah, that’s what I’m into lately,” said Dash. “But think about how good it’ll be! We’re in control now. Don’t you wanna know how big we can get? I wanna grow with you, Oval. I wanna get big, and watch you get big, until we can’t keep our hands off each other…”

Oval smiled and shook his head. “At some point in this relationship,” he said, “I’m gonna have to figure out how to say no to you.” He pushed off of Rainbow Dash’s ass and shrunk his seven-foot cock to a sensible four feet. “All right, let’s go for a walk,” he said. “But you’re gonna need to shrink this huge ass back down or we’re not getting out of this gym.” He gave her butt a smack, and she giggled happily.

Outside the gym, back to more sensible proportions, Oval scanned the horizon. “So where are you thinking of-”

Oval felt fingers gripping his body, and suddenly he was rising into the sky. “Too slow, dude!” said Dash. “I’m already huge. I’ll figure out where we’re going, all right?” Dash - about a hundred feet tall at this point - tucked Oval into her spacious cleavage. Her breasts were still massively, wonderfully disproportional, so big that they hung down to her belly button despite being perfectly firm. “Hang on, babe!”

Dash took off running, instantly picking up a superhuman burst of speed - partly because she was a hundred feet tall, partly because of her enhanced body, but mostly because she was Rainbow Dash. Her breasts, in defiance of the laws of physics, stayed almost completely stable as she ran, barely bouncing at all… and she ran with absolute precision, setting her feet down on empty patches of grass, unoccupied sections of road, and mostly empty sections of backyard. As she sprinted through the suburbs, a few fences got crushed underfoot, as well as a couple of unoccupied swingsets and porches, but she mostly kept the destruction to a minimum.

“What do you think, Oval?” asked Rainbow Dash, not seeming to be even slightly out of breath as she ran. “How about we chill by the mountains… and outgrow them?”

“Sounds like fun,” said Oval.

“I’ll get us there in no time,” boasted Dash. “Actually, I can get us there even faster if I lengthen my stride a little…” She grew, giving herself about fifty more feet of height, and soon she was striding farther and leaving bigger craters in the dirt. The distant mountains grew closer with each second - within minutes, Dash and Oval were well outside of town, stomping through the woods, flattening trees. And then they were at the foot of the mountain range, overlooking a crystal blue lake fed by a mountain stream.

“Ahh, beautiful,” said Rainbow Dash. “Much better than a day at school.” She lifted Oval from her cleavage and brought him to her lips for a kiss, pressing her lips against everything from his face down to his balls. “Wanna go for a swim?”

“Huh?” said Oval - but he soon got the point, when Dash lowered him to the level of her waist and dropped him, letting him fall right into the calm blue lake. It was a hell of a drop - some seventy feet or so - but his musclebound body was tough enough to take it. He plunged deep, then swam back to the surface, only to see the cloudless sky falling towards him -

No, it wasn’t the sky - it was just Rainbow Dash’s sky-blue bottom, falling right towards him. She was doing a cannonball into a lake that was barely big enough for her body. There was no time to swim out of the way… but it looked like her asscrack was going to come down right on top of him, so he’d probably be all right.

Rainbow Dash landed with a splash that probably drained half the lake’s water. Parting her legs, she looked down into what remained of the lake, searching for any sign of Oval Office. “Dude?” she called out. “I didn’t crush ya, did I?”

Suddenly Dash felt something pushing upwards on her butt. Something much bigger than a twelve-foot-tall beefcake. “Ooh, are you growing?” asked Dash. “Get real big for me, babe, I wanna see you grow into a big strong man…”

And Oval didn’t disappoint. He grew bigger and bigger, his thick legs and long cock swelling as his body rose from the lake’s bottom. Soon he was just as big as Rainbow Dash, but he didn’t stop there - with Dash seated on his lap, he made himself bigger - soon Dash’s head only came up to his pecs, then she was leaning her head on his washboard abs, and then - as he stood from the lake, water dripping by the gallon from his flawless glutes - she was happily straddling the base of his cock.

“Oh, now this is what I’m talkin’ about!” said Dash, bouncing her big round butt on the shaft of Oval Office’s stiff cock. “Damn, dude, even your cock is buff! My ass alone weighs tons, and you’re holding me up no problem!”

Oval was a good five hundred feet tall now, big enough that his cock could support the full weight of a hundred-and-fifty-foot-tall Rainbow Dash. “You like?” he asked. “I was getting tired of being the smaller giant, so I decided to outdo you.”

“Well don’t stop now!” said Rainbow Dash, grinding her butt against his cock. “I wanna ride a big fat cock! I wanna see how big my boy can get!”

“Anything for you, baby,” said Oval, and he began to grow again. His cock got so thick that Dash was having a hard time straddling it - so she wrapped her arms and legs around his shaft as best she could and started climbing. Clutching the veins of Oval’s cock, Dash climbed upward, hefting her weight toward the tip of the growing shaft - and with her trademark speed, she arrived at the mushroom head of Oval Office’s big blue cock. She parked her butt on his tip, letting warm precum spurt up against her asscrack.

“Not bad, dude!” she laughed. “You like being huge, huh? How about you bring me in for a kiss, big boy?”

Oval wrapped his arms around his cock, hugging it against his body. It was still disproportionately large - and it was exactly long enough that Rainbow Dash, seated on his tip, was lifted right to his lips when his dick stood straight up. She planted a kiss on his lower lip, taking a moment to relish her boyfriend’s immense size… and then she started to grow, determined to become a full-sized partner for her man.

Once Oval noticed Dash was growing, he put his hands under her butt, cradling her oversized ass. As her mass and her height increased, his hands dipped lower, keeping her mouth level with his and maintaining contact between their lips. Once she was big enough, Oval extended his tongue into her mouth, penetrating her lips, filling her mouth with a tongue that was many times bigger than hers. His fingers - big, long, and thick - crept into her pussy, parting her dripping lips and exploring her depths as she grew.

And before too long, Rainbow Dash felt her feet touching the water of the lake. She was nearly as big as Oval now, about a thousand feet tall, and the knowledge of her size was deliriously arousing. She planted her feet on the lakebed and leaned into Oval, wrestling with his tongue, pressing her tits into his chest, and grinding her slick pussy against his shaft. “Let’s do it,” she whispered, pulling back from the kiss. “Let’s get big.”

She let herself fall backwards, wrapping her arms around Oval Office to drag him down with her. Her big ass landed on the mountainside, damming the stream the fed the lake and flattening the trees that dotted the ground. Oval landed atop her, his cock wedged between her tits and dripping precum into her cleavage. She grabbed his cock by the head, navigated it downward, and put its tip against her pussy lips. “Let’s grow, baby,” she moaned as he entered her.

“Yeah,” whispered Oval, sliding himself deep inside her - and simultaneously growing his whole body, lengthening and thickening his cock inside her pussy. “Yeah, I wanna grow with you Dash, I wanna get big… Make those boobs grow, and I’ll fill your pussy with a long, hard cock…”

“Sounds like a good deal,” said Dash. She grew right along with Oval, expanding her tits and ass a little faster than the rest of her body. “Just show me how big you can get… and how big a load you can shoot into my hot, tight cunt…”

Rainbow Dash and Oval Office grew in perfect sync, their bodies intertwined, as Oval fucked Dash against the mountainside. The two giants heard a progressively louder cracking sound as they grew bigger - a sound which they eventually realized was shattering stone. Oval’s thrusting hips were hammering Rainbow Dash’s ass into the mountainside, pounding a deepening rift into the stone, slowly breaking the mountain apart.

“We’re so big,” groaned Dash. “You and me could wreck everything… flatten every mountain, smash every tiny little city…” She groped her giant tits, throwing back her head and tossing her long rainbow-hued hair. “Oh, Oval, I wanna see you swing that cock and knock down skyscrapers… I want you to flex your muscles and crack the fuckin’ planet…”

Oval Office was already putting cracks in the earth, sending long, jagged cracks through the mountain range that Rainbow Dash was leaning against. “Whatever you want,” groaned Oval. “Just as long as you grow with me...” Now a couple thousand feet tall, Oval thrust his hips - and the mountain beneath Rainbow Dash’s butt shattered into gravel, and she fell flat onto the earth.

“Oh fuck,” groaned Dash. “Fuck me into the fuckin’ ground, Oval… you’re a fuckin’ god, babe, your cock is so fuckin’ powerful… come on and fill me up, blow your load, shoot a lake of cum into my hot pussy…”

Oval held Rainbow Dash tight, and together they grew, overtaking a mile in height. Oval came, and Rainbow Dash got the lake of cum she’d been begging for; Oval’s cock, more than a thousand feet long, pumped a flood of spunk into her pussy. The rushing fluid, pummeling the walls of Dash’s pussy, triggered a climax in the giantess’ colossal cunt. Her womanhood pounded with orgasm, tensing with enough strength to bend steel, and she cried out, pounding the earth with her fists and kicking her legs. Oval Office panted and whimpered, shooting whole lakes of spunk into Dash’s pussy.

Oval and Dash collapsed onto the cracked earth, panting and sweating, embracing one another, lost in the afterglow and the ecstacy of growth. Even after growing past a mile tall, they both felt that they could go further… but for the moment, they were happy to lay in each others’ arms, casting a long shadow over the mountain range.