The late-morning sun shone through Sunburst’s window, drawing him from his deep sleep. He often needed a few hours’ nap before babysitting Flurry Heart. His princess could often be too excitable for the usually shy and somewhat introverted unicorn unless he’d had his beauty sleep.
It wasn’t long before a loud knocking reverberated through his sizeable wing of the castle; the Princess had arrived!
He hurried to the door, swinging it open to reveal Princess Cadance and Flurry Heart.
Cadance wore her regular regal crown, her expression betraying the usual calm collectiveness which she customarily displayed on her face. Her mane was in its usual clean and neat condition. Sunburst always admired the confidence her stature exuded as she never seemed to be stressed or overwhelmed with her responsibilities as the princess of the Crystal Empire, a trait he wished that he himself could possess.
Flurry Heart smiled up at him. Even after five whole years, her parents had refused to potty train her, allowing her to stay in diapers for as long as she wanted. At first, this had felt strange to the stallion, but after long he found himself strangely attracted to the sounds of her diaper crinkling as she played.
Not that he’d ever admit it.
“Hello Princess!” he said, smiling at Cadance, who had slowly gone from a royal, who was to be respected and feared, to a close friend over the years.
“Sunburst!” Flurry cried happily, rushing to him and wrapping her hooves around his leg.
Cadance giggled, smiling back at the stallion. “Thanks for having her on such short notice.”
“It’s no problem at all!”
“Before I go, I’d like to talk to you about something which may come off as a little…” she trailed off, “Strange…”
The unicorn ruffled Flurry’s mane, “Go on in, sweetie, I’ll be right behind you!” he encouraged, prompting Flurry to detach herself from his foreleg and rush inside, leaving the two adults alone.
“As you know, alicorn biology is quite different from that of a regular pony in that we develop in certain areas at a much higher rate,” she began. “This also applies to our… Sexual tendencies.”
A blush reddened Sunburst’s face. He was starting to gain some idea of where the Princess was going with her explanation.
“I’m sure you’ve noticed that Flurry’s body is developing much faster than that of other fillies her age. It won’t be long before she’ll be ready to breed. But she’ll need training before she’s ready to have a foal put inside her~,” she finished, smirking mischievously at him .
“P-Princess, y-you can’t be asking that I be the one train her?” he asked incredulously.
“Well, I don’t want you to feel obligated, but I know how you feel about her lack of toilet training~,” she teased.
A meek squeak escaped Sunburst’s throat as his blush thickened. H-How could she know about that? I-I was certain I hid it well enough! he thought.
“Come now, Sunburst, I’m the princess of love. You don’t think I wouldn’t notice how you look at my daughter’s rear when you think I’m not looking, do you?” she continued, flashing him a slightly sultry look.
“U-Uh… I-I… Um…” he stammered, glancing around for a way out of his embarrassing situation.
“Sunburst, it’s fine for you to feel that way. Shining’s the same after all!”
“H-He is?”
“Of course! There’s a reason we haven’t potty trained her yet!” she said. “Of course, it’s important that she consents if you are to fuck her, and be sure not to hurt her, okay?” she asked casually as if going over a grocery list with him.
“I-I’m sure nothing of the sort will happen. There’s no need to worry, Princess!” Sunburst said quickly, anxious to move on from the topic.
“We’ll see,” she said as she teleported a duffel bag into view and floated it towards Sunburst, who accepted it with his own magic. “I’m afraid I have to leave if I’m to make it to Canterlot on time. You’ll find everything you need in the bag, as usual.”
“Th-Thank you, Princess!”
“And when I say ‘everything’, I mean everything,” she cooed, making Sunburst bite his lip. “Bye for now, see you in a few days!” she said, before quickly igniting her horn and teleporting away, leaving Sunburst alone in the quiet hallway outside his rooms.
Sunburst looked around to make sure no pony was watching as he unzipped the bag and peered inside.
Usually, the bag would contain some of Flurry’s favourite toys, a bedtime storybook and a few fresh diapers for her to change into (though Sunburst had begun keeping his own collection for convenience).This time, however, the innocent dolls and other foal-safe toys were accompanied by a sizeable collection of sex toys: Dildos, ball gags, teat pumps and other assorted sexual tools. Strangely enough, they all seemed far too small to be used on a grown pony. It quickly dawned on him why that was.
Squeaking with embarrassment, he quickly took a few dolls from the bag and zipped it closed, clicking the door shut and hurrying to where Flurry sat waiting for him.
The sound of her clean diaper crinkling beneath her weight ignited his imagination, filling his mind with pictures of her spreading her legs on a changing table, waiting to be taken.
N-No! Bad Sunburst! he scolded himself, tensing to stop his cock from sliding out before his charge.
Flurry grinned up at him as she noticed his approach, filling his heart with joy.
“So, what do you wanna play first?” he asked, placing the dolls in front of her. She hummed in thought for a moment before her face lit up with enthusiasm.
“Let’s play princes and princesses!” she said, snatching a decidedly regal ‘princess’ doll from the group (which looked eerily like her own mother) and setting it up as she came up with a story to play out.
Sunburst smiled and picked up a ‘prince’ from the pile of dolls, playing along with his princess’ story.
They had only played for about an hour before Sunburst smelled it.
He stopped mid-action and sniffed at the air around Flurry, who giggled as she rocked and squished in her padding. His lungs breathed in her diaper’s scent; Flurry had messed herself!
“Flurry, did you make messies and not tell me?” he asked, a hint of excitement in his voice.
A blush spread across the small filly’s face along with a sly, mischievous smile. “Nuh-uh!” she said, returning to playing with her doll.
“I think you have!” he said, her mother’s words echoing in his ears as he patted her rump, listening to the squelch of the ruined diaper against her flank. His tip poked from out of his sheath as he felt her mush shift at his hoof’s touch.
It was too much for the weak-minded stallion to handle.
An idea formed in his mind. “Alright, changie time for little princesses!” he said while his magic scooped Flurry up. He grabbed the bag Cadance left him with, though he assured himself it was only for the spare diapers it contained.
She flailed and squirmed in complaint. “I dun’t wan’ changies!” she cried, struggling against her captor’s magical imprisonment.
Normally, Sunburst would promise her a treat if she let him change her without complaining, but he had a much more lucrative offer this time. “W-Well, if you let me give you changies, how about I teach you a brand new game?” he asked, bringing Flurry’s squirming to a sudden halt.
“What’s it called?” she asked, looking at him curiously as he took her to the room allocated as hers in his wing of the castle.
The bedroom walls were pink, with flowers and butterflies adorning the walls in playful, cartoon-ish designs. Her bedsheets matched the wallpaper, as she had found a girly obsession with everything cute and small.
A cabinet filled with toys, dress-up costumes and fresh diapers stood next to her changing table, which was adjustable to whatever height her caretaker might need her at.
“It’s called… Uh…” he trailed off as he tried to come up with a catchy name for the new ‘game’. It felt deliciously evil to teach her about her sexuality so early, but something about taking her innocence at such a young, tender age made him struggle to contain his arousal.
“The Grown-Up Game!” he titled it, making Flurry’s ears perk.
“Why is it called that?” she asked as he clicked the door shut behind them and lay her down upon the changing table.
“Because it’s a game only big colts and fillies can play!”
Flurry’s face lit up, she’d always had an infatuation with appearing as a ‘big pony’. “How do you play it?” she asked, wiggling excitedly on the table in her ruined padding .
The scent of her mess and piss filled Sunburst’s lungs, making it harder and harder for him to control his growing arousal. She was so innocent, so pure; his to take and defile.
More and more of his cock began to slide from his sheath, his stance widening as his instincts began to take over. Still, he had to make sure Flurry would play along.
“All you have to do is lay there and let me do the rest!”
“That’s easy!” she exclaimed.
“Uh-huh! But remember, if you ever want me to stop, you just have to say so, okay?” he asked, making sure his princess knew that she could always stop even though he knew that once he started she’d never want it to end.
“Okay!”
“Now, spread your little hoofsies for me, can you do that?” he asked, they were already held slightly open by her sodden nappy, but he couldn’t resist taking this opportunity to see her present herself willingly.
She did as she instructed, giggling as her mushy padding squished while she shifted her legs apart, grinning up at Sunburst cutely.
His cock throbbed to full mast at the sight, his nostrils flaring as he watched his charge present herself to him. He wasn’t going to be able to take much more.
Pulling Flurry to the very edge of the table, he lowered the changing table and reared up, placing his hooves on either side of her.
She giggled as his cock brushed against her soft belly. “Sunburst! Your colt parts are hanging out!” she said.
The reality of what was about to happen dawned on Sunburst as he felt her warm belly touch his stallionhood. His face glowed bright red at Flurry’s words, but he wouldn’t be deterred. Nopony could see what was to happen, and the royal couple’s insistence that Flurry’s room in his quarters be magically soundproofed meant no inquisitive maid or guard would come knocking at the door at the most unfortunate time.
“Th-That’s okay, sweetie, it’s all a part of the game!” he told her.
He shuffled on the changing table, shifting his weight so his cock poked at her rear. The soaked plastic squished as his shaft pushed against it, enveloping his tip with the warmth of her pee and mess, kept warm by her body heat.
Eventually, he found her pucker through the padding, feeling it stretch a little. He pushed harder against it, looking down at Flurry’s face as he started to gently thrust into her hole through her ruined nappy.
A conflicted mix of pleasure and curiosity was pasted onto her face as she watched him rock back and forth. “Th-That feels funny!” she said, looking up at Sunburst.
“B-But it feels good, doesn’t it, sweetie?” he asked, groaning softly as he humped against her again and again.
“Y-Yeah~,” she said, gasping as his cock pushed her mush into her tailhole, stretching it and sending waves of erotic pleasure through her body for the first time.
Sunburst bit his lip to stop him from cumming at her cute squeaks and moans, wanting to make his first time with her last as long as possible. His member throbbed and twitched with each satisfying squish and crinkle as he pushed harder and harder against her rump.
A squeak came from below him as he felt her squirming and writhing stop. The sound of liquid splashing against plastic accompanied the feeling of heat growing in the diaper his cock was pushed against so firmly.
“Uh-oh!” the filly said as she relaxed while she wet herself.
Flurry giggled mischievously as she emptied her bladder, her young body still unsure how to process the feeling of being pleasured by a stallion. His hooves quivered beside her as pee dripped from the sides of her diaper, the absorbent sponge of her padding finally reaching its limit and letting her pungent urine soak the table and dribble to the carpet below.
It was too much for Sunburst to handle.
The feeling of her piss soaking her padding, along with her aroma and innocent voice drove him over the edge. His shaft throbbed and spasmed as thick ropes of cum squirted from his tip, covering her diaper. He grunted and humped desperately at her squishy nappy, letting some of the cum paint her belly white as he milked himself with her warmth.
Flurry let out another giggle, “Eww, don’t go pee on me, Sunburst!” she exclaimed, feeling it drip down her barrel.
The stallion groaned and huffed with pleasure, deciding to give the princess-in-training a taste of the feeling of cum as he pulled the leg-hole of the diaper away from her leg and forced his cock inside, coating her rump with shot after shot of his foal-batter. His member sunk into a squishy mess of shit and soggy fabric, making him gasp and moan with ecstasy as the mush molded itself around his tip.
“G-Gah,” he groaned, thrusting into the padding as more and more sticky spunk poured from his length and leaked from the padding, adding to the stains of piss Flurry had already left as she wet herself. “G-Good girl,” he praised.
Flurry squirmed and laughed at his pleasured expressions, feeling a strange sense of contentment rise in her chest as she watched the stallion cum.
“Your pee feels sticky!” she said playing with it in her hooves as she subconciously grinded her slit on his cock.
Panting as he rode out the last of his earth-shattering orgasm, Sunburst smiled up at the princess. “I-It’s not pee, sweetheart. It’s called ‘cum’. It’s what colts make when fillies make them really happy!” he explained, pulling his cock from her ruined diaper and letting a torrent of cum flow from it.
“Oh, okies! Does that mean I win?” she asked hopefully.
“Uh-huh!” Sunburst replied, making her clap her hooves excitedly.
“Yay!”
“Now, I think we need to get you all cleaned up!” he said, tickling her belly as he dismounted the changing table and let his cock soften into his sheath.
Flurry pouted a little, rocking in her mess for a little bit before resigning to her fate as Sunburst used his magic to tear the tapes of the diaper away, lifting her rump and sliding the diaper away.
He blushed as he eyed up her messy and cum-stained flank, biting his lip to resist leaving her like that for just a little while longer. Reluctantly, he took a few baby wipes from a packet beside the changing table and begun to wipe her clean, leaving the cumstains on her belly as a reminder of her game.
She squirmed and flailed at the feeling of the wipes on her rump, which were still warm after being covered in piss, mess and cum.
“Stop it, Sunburst! It tickles!” she ordered.
He shook his head. “I’ll be done soon, sweetie!” he reassured her, teasing her tiny slit with the wipe as he passed over it, making her squeak with pleasure. He grabbed a fresh, pastel pink diaper from the cabinet nearby, quickly sliding it beneath her and wrapping it around her waist before taping it firmly.
“There, all done!” he said, making her giggle softly by tickling her belly once more.
“Thankies Sunburst,” she said, wriggling in her new padding to help it sit comfortably on her rump. “That was a really fun game!” she exclaimed, smiling at her caretaker with pride at ‘winning’.
He picked her up and set her on the floor. “I’m glad you had fun, I had lots of fun too!” he said, watching as she waddled about. “Do you want to go back to the living room and keep playing now?”
Flurry shook her head, shuffling her back hooves. “I-I still feel kinda funny in my princess parts…” she muttered. Ever since Sunburst touched her slit, a strange need had been growing in her nethers.
A look of realization crossed Sunburst’s face for just a moment. Flurry still didn’t get to cum! Another opportunity for learning!
“I know just the thing for that!” he told her, his horn glowing and re-energising him, letting his cock slowly emerge once more. “If we play the grown-up game again, you can make those feelings all go away for a while!” he explained.
“We can play again?” she asked excitedly, her diaper crinkling as she flicked her tail happily. It seemed she was already addicted.
“Of course!” he said, moving to the bed not far from her changing table and laying down on his back. His aura surrounded her, lifting her up and placing her diapered rump on his cock so that his shaft pressed against her cunny though her padding.
“Now, this time, how about you rub yourself up and down my colt parts?” he prompted, causing the flustered filly to place her tiny hooves on his belly, wobbling back and forth as she started to grind herself on his member.
“Unf~,” the stallion groaned, grasping her little hooves and helping her keep her balance as he began to hump and grind at her little slit. “Y-You’re so good at this!” he praised, making her beam with pride as she pressed her cunt against his shaft again and again.
A new warmth spread across Sunburst’s cock as she rubbed herself on him, the slow trickle of pee from her fillyhood soaking her padding and squishing against his flare each time she rubbed her crinkly diaper against it.
His horn glowed as his magic reached into the bag nearby, pulling from its depths a pink, pill-shaped vibrator with a remote control with a single large knob to increase the vibrator’s speed.
“Wh-What’s that?” Flurry asked between gasps and squeaks of arousal.
“It’s a special toy, m-made just for the grown-up game!” he replied, switching it on and letting it buzz in the open air for a moment before slowly beginning to slide it down into the front of her diaper.
“H-Hey, that tickles!” Flurry cried, squirming against the little pill as Sunburst concentrated to find her little clit with his magic and gently rest the vibrator upon it before slowly making the vibrations more intense.
The filly gasped and squealed with arousal as the toy tickled her sensitive fillyhood. Sunburst felt her muscles tense and shiver in his hooves as she started to pleasure herself on his member once more.
Sunburst looked up at her from his position on the bed, watching her face of desperate pleasure tense and relax as waves of ecstasy rolled through her body. He savoured each and every delightful squeak and moan that slipped from her tongue, which hung from her mouth as she panted with lust.
“S-Sunburst? S-Something w-weird’s happening…” she managed to tell him between and squeals. She was getting close to climax!
Sunburst almost allowed her to cum, but his primal senses told him otherwise. Why should the filly get to cum before her stallion? He recalled her mother’s instructions, he was meant to be training her for when she marries, not to be a common whore with no self-control!
His horn quickly flashed as he lifted Flurry from his shaft and turned the vibrator down to the lowest possible setting. She pouted and whimpered as the pleasure that felt so satisfying to her young body left her.
“A-As a princess, you’re not allowed to make cummies before a colt, you’re supposed to make him happy first, understand?” he explained, smiling up at the pouty filly.
“Mommy told me about that, she said a princess should always try to make her stallion happy!” she said proudly.
“Uh-huh, she’s right! So now you’re going to make me happy before I let you cum!”
“I can make that cum stuff too?” she asked excitedly.
“Of course! It’s a little different from mine, but it still feels really, really good when you make it,” he replied, giving her a sly, playful smile as he lowered her so her belly lay upon his. Her padded rump faced him, with his musky cock resting not even an inch from her muzzle. “Go ahead and start licking, sweetie!” he encouraged.
“B-But that’s where your pee comes from!” she said, squirming away a little.
“I promise you’ll like it once you start. And if you don’t, we can stop whenever you want~” he cooed, pressing a forehoof to her rub and massaging the slightly wet padding and hard vibrator against her nethers.
“O-Okay…” she said reluctantly. She gave his cock a tentative lick, breathing his musk deep into her lungs. A smile grew on her face as she tasted his shaft. Her inexperienced lips wrapped around his tip awkwardly, her hot tongue flicking his sensitive stallionhood and filling his crotch with erotic pleasure that quickly flooded the rest of his body.
He had spent so many hot and bothered nights dreaming of the feeling of his princess’ soft lips sucking him off diligently, never in a million years did he expect that it would feel so good to have her lap at his throbbing member.
She was starting to adapt to the feeling of having a cock in her mouth, changing her breathing and swaying her padded flank back and forth enticingly while she worked.
Precum poured from his tip in salty squirts, coating Flurry’s tongue with his clear fluids. She savoured the taste, gulping down the liquid as it filled her mouth.
“T-Try taking more of it, sweetie~,” Sunburst instructed, lightly pressing on the back of her head to encourage her to take him deeper into her maw.
Flurry eagerly followed his instruction, pushing his stallionhood a little deeper into her mouth so that his tip rested on the back of her throat.
Sunburst grabbed the remote for Flurry’s vibrator, turning the knob on its face so that the vibrations became more and more intense the deeper she managed to push his cock into her maw as a reward for pleasing him.
The pleasure suddenly returning to her body made her shudder and moan, making her throat vibrate on his tip and sending a spear of arousal up his spine. His cock throbbed in her mouth, squirting more of his pre down her throat as her warm spit leaked from the corner of her mouth and dripped down his balls.
“T-Take a deep breath, sweetie,” he instructed, preparing to make use of her throat. Flurry pulled away a little to allow herself to breath in a huge lungful of air, laced with Sunburst’s arousing musk.
He quickly captured the opportunity to thrust at her throat, forcing his flared tip into her warm insides. His eyes rolled back as her young throat tightened around his meat while her squeaks and moans made it vibrate around him.
It took everything he had to stop him from painting her belly white then and there.
Screwing his eyes shut, he dragged himself from the depths of her maw, turning down the vibrator to let her body recover from her first time ever deepthroating a stallion. She gasped and panted for air for a few moments before Sunburst lost the ability to stop himself from plunging himself deep into her slick throat once more.
He let out a deep groan of pleasure as he humped at her mouth, pushing his cock even deeper into her mouth than before. The stallion’s hoof pushed against the rear of her diaper, pushing the vibrating pill deeper into her cunny and making her squirm with pleasure.
Flurry’s hot breath tickled his crotch each time he thrust in and out of her throat, pushing him closer and closer to the edge with each wet ‘gluk’ and ‘shlick’ of his member bulging in her little throat.
It wasn’t long before her lustful sounds and needy scent became too much for the stallion to handle, not even his best efforts to stop himself from cumming could prevent the dam in his crotch from bursting. A deep, dominant grunt emanated from within him as he gave one last powerful stroke of his hips into his princess’ mouth.
He quickly turned the vibrator to its highest setting, his hoof gripping her diaper desperately and forcing the violently vibrating toy deep into her cunt. She screamed around his cock, gagging and choking on the torrent of hot, gooey stallion spunk that poured into her belly.
Tearing his thick meat from her throat, Sunburst let his cock throb and twitch in the open air, streams of his seed squirting from his tip and coating the little alicorn’s face in a layer of sticky semen. Her mouth hung open, letting her tongue catch the cum that dribbled down her muzzle and savour the bitterness of it.
Her own diaper was soaked with her juices, her tiny clit winking wildly beneath the warm padding as her filly cum soaked her nappy. She humped desperately at the vibrator buried in her folds, wanting her climax to last as long as it possibly could.
Both ponies fell limp on the bed as they basked in the afterglow of their orgasms. Flurry rolled to the side and let herself fall to the bed sheets below them. The air was laden with the scent of sex and sweat. Their ‘training’ had been more than successful. He reached into the diaper and slid the still buzzing vibrator out of her, turning it off and discarding it on the floor beside the bed after licking it clean to savour his filly’s taste.
“G-Good girl~,” Sunburst praised her, his horn glowing as he pulled her up to his level and kissed her on the lips passionately for a moment. His heart fluttered as he felt Flurry’s soft, cum-stained lips against his. They were so innocent, so young.
And now they were his to train.
Flurry opened her mouth to respond, but found herself far too exhausted from her throats rough usage. She instead opted to press her muzzle against Sunburst’s in an affectionate nuzzle to tell him how she felt.
Her mouth opened in a wide yawn as her eyelids drooped. She snapped herself away from the jaws of sleep, determined to stay up so she could play more. She tried to pull herself to her hooves, but found that her orgasm had left her limbs too weak to stand properly.
Sunburst quickly noticed her struggling to get up and decided to step in. “Alright sweetie, I think it’s time for your afternoon nap…” he told her, his own yawn echoing hers. He lifted them both off of the bed to roll the bedsheets down and slide them both under the covers.
“B-But… I-I dun wann…” she couldn’t even finish her sentence before sleep claimed her mind, her words turning to nothing but a mess of happy mumbles as she dreamed about her new favourite game.
Sunburst himself couldn’t keep himself up for much long after that either, joining his charge in softly falling into dreamland as he pulled her close.
His cock slid from its sheath in his sleep as he relived the experience of fucking Flurry again and again in his dreams, poking at her rump with his shaft as he found his arousal building once more.
They wouldn’t be short of games to play after naptime, that was for certain.
