Twilight Sparkle trotted happily away from Canterlot Castle, completely oblivious to her mentor's guilty pacing in the tower far above. Her monthly meeting with Princess Celestia had been just as enjoyable as ever, if a little rushed. Celestia seemed to have something else on her mind, and though she'd tried to hide it, she'd seemed anxious that Twilight drink her tea as quickly as possible. Said tea had tasted unusual, as well - a new blend from Zebrica, according to Celestia. In any case, after a good chat, Twilight was happy to be on her way home to Golden Oaks library in Ponyville. She felt like she was coming down with something.
She was sweating a little, and felt a stomachache coming on. Twilight groaned a little while boarding the train, massaging her uncomfortable tummy.
* * * *
"Pinkie, I really can't worry about your twitches right now..."
"But Twilight! This isn't a normal twitch! It's a doozy!"
Twilight paused. A Pinkie Pie doozy wasn't necessarily something to ignore. At the same time, though, she was still feeling weird. The stomachache was gone but something else had taken its place; something... tense. She felt hot, too Oddly hyperaware. "What kind of doozy," she asked suspiciously.
"No telling, Twilight. It's the biggest I've ever had! We should be on the lookout for, like, world-ending horrors. Or! Maybe just a really really big friendship problem! Or-"
Twilight zoned out as she spotted a patron enter the library behind Pinkie Pie. A cyan stallion with a black mane. He meandered over to a nearby shelf. Twilight's eyes ran over him and she swallowed. It had been a while since her last one-night stand. What was his name again? Rising Star? He was nothing special, but he'd do.
Twilight realized Pinkie hadn't stopped talking. Blinking, she gently put a hoof on the Pink mare's mouth. "Okay. Keep me posted. I have stuff to do though so I'll see you later."
With that, Pinkie Pie found herself dragged backwards, gently but with speed, by Twilight's levitation magic. As soon as she was out of the library's door, it shut in front of her with a click. There was a second click soon after.
Pinkie rolled her eyes. "Yeah, I know what you need to do. I could smell it."
Shaking her head, and still glancing around anxiously for whatever disaster heralded by the doozy, she turned and walked back into town.
* * * *
She needed it.
"Hhaah... haaahh.. yes... yes....!!" The sallion thrust into her again and again, and Twilight had never felt so good. It was strange, though. The heat she'd felt before just kept rising, and the ache hadn't gone away. On the contrary, it had intensified. It didn't seem like a stomachace any more: Twilight couldn't explain it (and she was far too busy getting railed to try) but it seemed to be coming from her womb.
"Nnngh... gonna... cum..." the stallion began to pull out. Eyes widening, Twilight took hold of him in her magic and forced him back in, forced him to keep thrusting. "Nnggaaah! What... what are you... ohhhhnnnNNNGGGGGGHH..!"
Twilight shuddered in bliss as she felt him explode within her. It was reckless, and she had no idea why she'd done it, but barely a minute later it became clear.
The most wonderful feeling of warmth spread throughout Twilight's body, emanating from that space of emptiness, and the pain receded: inexplicably, the emptiness had been filled. Twilight's eyes widened as the unthinkable began to happen. She felt it: a strange pressure, that became a strange bump, that grew and grew right before her eyes.
She was pregnant. And getting more pregnant by the second.
Twilight's eyes rolled back into her head as she came. Something clicked in her mind, and she knew it wasn't enough. A single desire had overtaken her wits.
The blue stallion panted, still hard and still held fast within Twilight's wet cunny. "What's happening? Is that... oh Celestia..."
"It's our foal," Twilight breathed as the bump stopped growing. It looked like a full-term pregnancy. Somehow, she'd gotten pregnant and all the way to full-term in less than a minute.
The stallion can't seem to accept what he's seeing. "Let... let me out..."
"No chance," Twilight purred, panting herself. "I want... more."
"I don't think I can--"
"Oh, you will." With that, Twilight cast a spell. The stallion gasped as his nuts refilled, his cock got harder than ever, and Twilight began thrusting him into her again and again.
He was just along for the ride. Twilight was a powerful enough unicorn to keep him there as long as she wanted. And all she knew is that she wanted more cum from him.
It's not long before she got what she wanted.
"Yeeeessssss..." Twilight's hiss of pure bliss comes as she has another orgasm at the thought of what's next. Again the cum did its work within her, again that feeling of warmth and pressure... and her baby bulge grew once more.
With two fullterm foals within her, Twilight could barely move. A third would be near-impossible to handle. Luckily, there was a spell for that...
This time it was Twilight that was engulfed in the purple glow. She cast the spell and sighed.
Sure enough, within a few seconds she began to grow.
Not by much. Just enough to take her twins-bulge down to a normal full-term bulge. It was enough to give her a good few extra inches of height, though, and as her hooves and flanks stretched out across the bed she shuddered. It felt good. The next coherent thought was to realise that, if she kept going, each foal within her would make her grow more... and more...
She could be the biggest mother Equestria had ever seen...
With a moan, Twilight cast the spell on the stallion again, ignoring his protests and questions and pleas. The third, the fourth, the fifth foal blossomed within her, and the pleasure was utterly electric.
"Make me bigger..." was the only thing Twilight said other than moans and yesses. "Make me grow..."
The poor stallion could only comply. It's not until Twilight's rear hooves hit the wall on the far side of the room that she thought to notice anything but the pure pleasure of growth.
For a moment, she stopped.
"No more... I can't give you... any more..." He was a ragdoll. Exhausted and used. But Twilight felt the compassion of a mother, now, and had an idea of how to reward him.
"You can give me one more," she breathed gently, an enormous hoof reaching down to stroke the tiny pony. "You can be with your foals. Would you like that?"
"I don't... understand..." he whined.
"It's okay. You will."
With that, her magic took hold of him and gently shoved his rear hooves into her cunt. He struggled a little, but Twilight just hummed in pleasure at his movements as he slowly disappeared into her. It was incredible. She was being stretched, stretched by this stallion as his whole body entered her, and she didn't stop when he was just deep in her vagina. She pulled him further, moaning as the stallion ended up in her womb along with all the foals. Once again she's ballooned cartoonishly outward.
Once again the spell did its work.
Twilight quickly realised she was going to grow far too much for her room to handle, and teleported outside of the library with a loud crack. There, she panted and panted, cumming again as her flanks pushed out along the earth beneath her. She was getting big, now, thanks to the stallion that's just another foal inside her gargantuan belly.
She rubbed herself with a drunken smile. "My foals..." But it wasn't enough. She knew she could carry more. She knew she could get bigger. And it's all she could think about.
When she stopped growing and stood up, a little off-balance, she found herself at least thrice the height of a normal pony. A good start, she supposed. But as the townsponies slowly registered her presence, and her size, and her clear pregnancy... it was about to accelerate.
"I need a new mate," Twilight announced to the ponies that were beginning to gather, ignoring their exclamations and questions. "Any of you that want to impregnate me, step forward now."
The ponies just looked at her in confusion. It was evening and the sun behind Twilight gave her the impression of godliness before them. After a few moments she repeats herself. "I need to be more pregnant. If there aren't volunteers, we'll do it by lottery..."
A stallion hesitantly stepped forward, cock already hardening at the idea of fucking Twilight, and was immediately pulled close to her with a lewd growl. Twilight noticed her magic was coloured differently, now: it looked halfway between her original colour and that of the unicorn she'd unbirthed. So his magic is mine, now, she realised with a thrill. Every time I take one... my magic will get stronger. It was an utterly intoxicating thought, and she looked down at her new mate hungrily.
He looked up, and up, and up at the towering figure before Twilight dropped onto her flanks and shoved him against her roughly. She wasted no time, this time, and made him cum within a few seconds. Then again, and again.
"Hhhaaaaahhhh...." Twilight began to grow as new lives blossomed again within her. The townsponies backed away, in fascination more than fear. More stallions stepped forward, and Twilight smiled. Their turn would come.
It was almost without thinking that she took the stallion into herself. He slid in easily, the size of a normal dildo now, and ended up beside the first and all the foals they'd spawned so far. With a smirk, Twilight had a new idea: enveloping both stallions inside her, she cast a variation on the spell from before.
They began to frantically hump and cum within her.
The foals would make more foals.
Twilight's eyes rolled back into her head and she fell backward with an earthshaking boom. "Bigger, bigger," she muttered, for all the town to hear. "Wanna get bigger... more pregnant... more foals inside of me..."
And to that end, she blindly took ponies from the crowd and inserted them into her cunt, one after another. The stallions began cumming immediately. The mares... well, with the power Twilight had by this point, they didn't go without cocks for long. Every pony that entered her womb became one of her foals, and every foal was going to make her more foals.
Yes. It was too much. The pleasure was beyond anything Twilight could have possibly imagined. I'm going to keep going. Never stop. Just more pregnant. Just bigger and bigger and bigger.
Indeed, she really did just keep getting bigger. It was slower, now, even with the many ponies impregnating her over and over: foals aren't that big compared to a pony five times the size of a house. She waddled down the main road, taking more ponies indiscriminately.
"Everypony in Ponyville," she breathed, loud enough to be heard for hundreds of meters, "come meet your mother. Come and fuck her. Come and become one of my foals." She rubbed her belly lovingly.
And the ponies came in droves.
Bigger, bigger... and always, the feeling of fullness pervaded all her senses. She wasn't just a giant, she was a mother beyond imagination. Soon, all of Equestria-- no, all of the world-- would be her progeny. She just had to get bigger.
It's when she outgrew Ponyville that the princesses showed up.
Princess Luna cast a spell, and the goldy alicorns grew too, just to be able to be heard by the titanic mare. They were foal-sized to her when Twilight took notice, and smiled.
"Celestia. Luna. You've come to join me."
"Twilight, this is out of control," Celestia said waveringly. "Some of this is my doing. Clearly it was a mistake. Let me fix you--"
"No," Twilight replied with a laugh. "I need to thank you. Whatever was in that tea has ushered in a new era. I will be mother to all." Indeed, Twilight was still growing, foal after foal materialising inside of her with a town's worth of cocks exploding into her all the time. "Nnf." Her eyes fluttered. "It's so good. It's like a hundred orgasms, all the time, never stopping. And you will help make me even greater."
"Twi--"
But whatever the princess was going to say, she was silenced. Twilight outpowered her by orders of magnitude now. "So thoughtful to make yourselves bigger for me," Twilight giggled. "You'll make wonderful foals..."
First, Luna was shoved into the utterly massive pussy, headfirst, her growing cock coming to attention. "Hhhaaah.." Twilight was stretched, stretched, taking the enormous princess that was like a foal to her into herself. It didn't take long. The ropes of cum Luna started producing were enough to spawn hundreds upon hundreds of new lives. With a rumble, Twilght's growth accelerated.
Celestia was easier, now that Twilight was growing again. She savoured pulling her former mentor into her cunt legs-first, stroking Celestia's cock as it slips into her. Celestia's eyes rolled back into her head as she started to cum, and a second later her head slipped past Twilight's folds, never to leave again.
"YES!!" Somehow the pleasure intensified. She was orgasming constantly before, but now a sort of ultra-orgasm hit her for the first time. She screamed, and cities across the nation heard it. The sun and moon chased each other across the sky as the titanic alicorn spasmed in pleasure, absorbing the princesses magic and becoming a true goddess.
In the haze of pleasure, Twilight realised she'd soon outgrow the country. She was growing miles at a time. She needed to take her foals into her now--
The biggest teleportation of all time took care of the problem. In a split second, every pony in Equestria found themselves inside Twilight's womb, and they all began to cum.
Twilight stood, twitching at the occasional ultra-orgasm, and looked out over her world. She could see the curvature of the planet, and the nations beyond. And all of them soon to be her children. She rubbed her belly, savouring what was to come.
With time, the foals inside of her would grow old enough to start cumming themselves. And then, nothing would stop Twilight from becoming the greatest mother in the universe.
Author's Note
So, this was a long time coming. For Klamnei. I hope you enjoyed!
