“—so, as you can see, Princess, the irrigation of the crops is a very...thorny issue.”

“Mm.” Celestia nodded vacantly. Around her, the Day Court buzzed and warred for her attention, but she had eyes for only one pony. She looked past the little form of the stallion bowing before her throne, over his shoulders, and to a darkened corner in the back left of the throne room. Anypony else might have missed it, but Celestia recognized the glimmer in the darkness, the twisting shadows, the unmistakeable glint of her bright blue eyes.

Luna was watching, and she expected a show. Celestia sighed, pushed the words of her petitioner even further out of her mind, and summoned up her magic.

She hated to do this, she told herself as she focused her energies around her crotch. She normally loved listening to her subjects: their fears, their worries, their hopes, their dreams. But she had made a bet, and she had lost, and it was time to pay up. As the spell took hold, she grunted; a wave of arousal ran through her body, leaving her shuddering in lust. She had a feeling she’d need all of her attention for the things to come.

As the bulge at her crotch began to grow, though, she resumed eye contact with the kneeling stallion. Her horn glimmered, at first imperceptibly, then obviously, the golden glow swelling with every inch of sensitive flesh emerging from her groin. “Mm,” she grunted again, nodding. “I see. And what do you suggest we…”

She felt the two orbs slip out between her legs and nearly gasped. The sudden tightness within her panties was...incredible. Intoxicating. She felt her new organ give a throb and almost moaned. Already, there was a very obvious stain showing through the front of her dress, and there was no way anypony would miss the long, hard shape slowly pushing up the hem of her gown.

“Well, I thought it obvious...” the petitioner said. He took a lengthy pause, gulping as his gaze fell on her growing erection.

“Continue, sir,” Celestia said politely.

The stallion nodded quickly. “If you’ll forgive me for saying so, Princess. We merely—”

A tremendous r-i-i-ip echoed through the Court. All at once, the room went silent, save for Celestia’s trembling pants. On the floor beneath the throne, Celestia’s pair of floral-decorated panties lay in shreds, torn off by her burgeoning erection. Meanwhile, poking out from the underside of the hem of her dress, very clear to anyone who so much as glanced in her direction, was a thick, black stallionhood, throbbing steadily and drooling with precum.

The stallion before her gulped. Idly, Celestia wondered if he was even half as big as she currently was, then stifled a moan as her balls swelled a few inches larger. “P-princess?” the petitioner said, stumbling over the word. “You—your—”

Celestia forced herself back under control. “What?” she asked, doing her best to sound innocent. Admittedly, she was blushing slightly—it was hard not to when one suddenly sprouted a two foot cock in the middle of the Canterlot Palace—but she couldn’t help but feel slightly proud of herself. And it felt so good to have her stallionhood free of the confines of those panties. “Do go on.”

The petitioner swallowed again. “Y-yes, Princess,” he stammered. Celestia noted the way his own pants were tented around his crotch with an approving glance. Her cock bobbed lazily between her legs as he returned to his argument; a glob of pre the size of her fist plopped onto the floor beneath her throne. Eyes widened and nostrils flared as a heady, masculine musk spread to fill the room.

Celestia groaned softly. She had to rearrange her legs, widening her seating position so that her soft, thick thighs wouldn’t compress her balls so much. Her new-grown nuts felt so big, fat and positively sloshing with cum. And the more her stiffening dick lifted up her dress, the more everypony would get to see of her jizz-stocked orbs. She licked her lips, moaning again as her dress slipped past her medial ring. She rather liked the sound of that.

At the back of the room, she could just barely make out Luna skulking in the shadows, smirking at her, her dark eyes glinting. But the headiness of her new organ’s arousal was beginning to get to Celestia, pushing her to fulfill the terms of their bet. Luna’s teasing and encouragement were no longer the only factors in play. Celestia was horny, and she was suddenly determined to see that lust straight through to the end.

“And, as such, a complete...fertilization...of…” The petitioner trailed off, staring at Celestia with wide open eyes. Celestia shuddered as she felt her cock, now completely hard, brush up against her chest. Her grapefruit-sized nuts were on clear display to the entire Court, and her nipples felt rock-hard against the confines of her bra. Moaning softly, she hugged her shaft to her bust and let the pillowy softness of her breasts fold around it.

Oh, gods. It felt so good. Precum ran down her shaft in buckets, quarts of warm, milky cum staining her dress and throne. Celestia pressed her tongue to her flare and was instantly rewarded with a gush of hot, salty pre; she wormed her tongue deeper into her slit, groaning as her enormous member throbbed, a fresh batch of arousal staining her cheeks and muzzle.

She could feel her balls churning, swelling with each pump of her cock between her massive tits. None of the Day Court were even pretending to go about their normal business anymore; none, it seemed, could even be bothered to gasp or gossip. They were too taken with Celestia’s massive stallionhood, with the musk that was spreading throughout the room, leading to strained pants and moans synced in time with Celestia’s. The steady flow of pre down the sides of her throbbing length captured the eye, exposing just how large, how virile she was becoming. She was just too much cock, too utterly sexual, for anyone to even pretend to pay attention to anything else.

Off in the corner, she could see Luna pressed against one of the stone-hewn pillars of the throne room. One hand was clawing at her bust, the other shoved down her pants. Celestia smirked at the rosy red blush on Luna’s face, at the flushed, dilated look in her pupils. She could hear her sister’s little pants already, gentle moans of arousal. She imagined her massive cock pressing between Luna’s tits, or perhaps shoving its way between her generous...assets.

She could feel the eyes of her court, every one of them watching her, staring at her. They were murmuring among themselves, the buzz of their voices tinged with awe and barely contained arousal.

"—never seen something of that size—"

"—right in the middle of—"

"—oh, and that smell. It's making me so—"

"—and there's just so much of it—"

"—in front of everyone; does she even know where she is?"

Celestia's muzzle curled up into a smile. Oh, she knew exactly where she was. She just didn't care. She found herself caring less and less, her thoughts growing more and more focused on the fat, throbbing cock pinned between her heavy tits. Everyone could see her endowments, could see her enjoying them, and she loved it. She could see the tents in her subjects' pants, could see the way they eyed her with gazes full of lust and primal envy. She was a goddess...and now, her body showed it.

Celestia tightened her grip around her bust and groaned as her cock throbbed in response. There was so much pre… It was absolutely everywhere. Her hard nipples showed through her dark-stained dress, standing fully erect as her shaft bucked and throbbed. Her muzzle was drenched in her precum, her tongue idly lapping at her flare as she gulped down mouthfuls of her own warm, salty lust. But she wasn’t done yet, not by a long shot. An ominous rumbling filled her ears, and she closed her eyes, breathing hard as she imagined herself grinding against Luna’s round, plump ass, kneading her buttcheeks as she prepared to spear her on her monster of a shaft—

With a cry, Celestia’s hips lurched forward. Her whole body jerked and writhed as her massive cock lurched, blasting huge globs of thick baby batter in every direction. Hot, creamy jizz splattered the walls, the ceiling, the floor as her huge nuts emptied themselves; every member of her Court found themselves drenched in Celestia’s heavenly spunk. But she received the most of it—as her cock twitched and throbbed, firing volley after volley of cum, most of the output landed back on its owner. Within minutes, she looked like she’d come from a rather harsh snowstorm, every square inch of her body covered in thick, white cream.

Celestia finished with a gasp, then her whole body shuddered to a perfect stillness. Her chest heaving, she looked out across the cum-splattered crowd. She saw the trembling petitioner (who was now clearly jerking himself off through his stained pants), saw the members of her Court staring at her with wide eyes, as though they’d never even seen her before.

Celestia groaned, both in the satisfaction of release and some form of gruff embarrassment. “I hope you enjoyed that, Luna,” she mumbled under her breath. Her cock twitched, a final glob of jizz splattering messily on the floor.

Back in the corner of the room, Luna was shuddering happily. She still had her hand in her pants, but her crotch was dark and stained, and there was a red-cheeked grin on her face. She shot Celestia thumbs-up and beamed.

Celestia just sighed. Now for the cleanup.

And then her cock throbbed again.

Well, she told herself somewhat hungrily, eyeing the towering pillar of cockflesh before her as it stiffened back to its full height. Perhaps she could fulfill their bet twice over...