Leaving behind the scene that was equal parts cute and arousing, Fluttershy trotted her way downstairs. She did well to suppress any giddy squeaks that wanted to sneak past her little smile as she further distanced herself from the nursery. The smell of lavender and the subtle stench of stale urine was slowly replaced by lemon scented cleaner and the smell of preheating ovens.

Mrs. Cake was found in the kitchen, still cleaning things up from yesterday's party. It was as if the building was going through a transformation. No longer a hothouse of diaper wearing ponies who spent their day covering their faces with mushy food and shamelessly rubbing their padded crotches. The place was now starting to once again resemble a place of business. Glass paned display cabinets emerged from under tarps, card tables were folded up and put back into storage, and fun looking toys were boxed up and hidden away until next time. Slowly the remnants of yesterday’s party were being packed away.

Carrot Cake scurried around in the background, still wearing his soaked morning diaper. With plans of opening the store tomorrow, there was still plenty to do for both ponies. Sweets needed to be made, pastries baked, and cakes decorated. While Mrs. Cake tended to the remaining guests of the party, he oversaw the number of cookies and treats that cooled on the countertops, all the while his cool, soggy diaper sloshed and rustled behind him.

“Uhm...M-Mrs. Cake?” Fluttershy started with a small voice.

“Yes, Shyshy, what is it?”

“Me and Big Mac are...done playing and uhm...” Fluttershy’s eyes dropped to her feet, “he still needs to be changed.”

“Kept him stinky and locked up this whole time?” Mrs. Cake inquired, “my, Fluttershy, I didn’t think you were such a naughty little filly!” She rustled Fluttershy's hair, causing the pegasus to blush up a storm. “Well I guess I better go change him then. Wouldn’t want him waddling around the place and getting a rash!”

With that, Mrs. Cake trotted upstairs and Fluttershy felt obligated to follow. Afterall, in a way she was partly responsible for how dirty Mcintosh had become. It just didn't feel right to leave all the cleaning up to Mrs. Cake. At the very least she felt the need to assist in changing such a mess. Or perhaps it was because she'd be able to see his adorably stinky self one last time.

Pausing at the nursery door, the two mares looked into the room and at the adorably silly sight. Big Macintosh, with his swollen and heavily stained diaper, kept true to his word and was right where Fluttershy had left him. He laid among the scattering of colorful toys., cuddled up against the bulk of the big teddy bear with the plushie's snout firmly buried underneath the stallion’s rump, enveloped by the soggy, stinky padding. Fluttershy couldn't lie to herself, she just couldn't get enough of the embarrassingly erotic and cute spectacle! It made her heartbeat pick up again, returning to that excited rhythm that she reveled in just minutes before.

“I take it this was your idea?” Mrs. Cake quietly asked. Fluttershy could only shyly blush as she stifled a little giggle. With a playful roll of her eyes, Mrs. Cake turned her attention to the stinky colt. "Alright, Little Macky, I think you've had enough time to play with your toys."

She trotted into the room and proceeded to give Mcintosh a very thorough diaper check. A hard pat on the butt, an exploitative squeeze at the front, she even pulled the back of Big Mac's diaper to give it an old fashioned sniff check. All the stallion could do was squirm futility with cheeks flaring a bright red. It all felt like Mrs. Cake was putting on a show for Fluttershy.

"Yep, looks like you're in DIRE need of a diaper change!" Mrs. Cake finally concluded, pushing some toys aside to clear an area in the center of the nursery. "Too poopy to try to walk you over to the changing table! We're just gonna have to change you here."

Whimpering some kind of argument, Mcintosh frowned as he pulled away from the mess of toys and rolled onto his back in the all too familiar diaper changing position. The brown stained lump around his butt squelched an embarrassingly loud squish that bad bother diapered ponies blush by association. The mound of swollen, yellow padding bunched up most around his crotch gave the area a deceptively well-endowed appearance.

"P’ew! Just what were you doing in that diaper of yours? You're a mess!" Mrs. Cake continued as she snatched a hoofful of supplies from the changing table, "you know, Fluttershy wasn't nearly as poopy as this!"

It was tough to say who among Fluttershy and Mcintosh blushed and squirmed the most at this comment. Fluttershy shrunk back against the wall when she heard this, muffling a silly feeling giggle with a hoof. Mcintosh would have shied away as well, but the weight of his diaper kept him on his back, forced to have a blushing contest with the ceiling.

Minutes later - an obviously long and deliberately drawn out waiting period - Mrs. Cake had assembled all the necessary supplies and had positioned herself near Mcintosh's bulging waist. She took an even longer time carefully arranging the wipes, the extra diaper, and the baby powder within reach, checking and double checking the items to insure she had enough to proceed. It was only after another five or so minutes did she begin by popping open the tubs of wipes.

Before she got started, however, there was a tentative knock on the open nursery door.

"U-uhm, howdy do, Mrs. Cake, Fluttershy," came Applejack, who stood smally in the doorframe.

Fluttershy stammered out something that resembled a quick "good morning, Applejack!" but it almost came out like a jittery mess when she said it. In an instant she felt startled, nervous, happy, excited, and embarrassed at the sight of her friend Applejack. She noted that she wasn't wearing a diaper and for some reason that shook her mental foundations a bit. In a weird way, Applejack walking around here diaperless made all this feel kind of silly. It all made her want to slink deeper into the wall and disappear.

"Mr. Cake said ya'll'd be up here." Applejack blushed as she continued, "ah didn't think ah'd be interruptin'..." She tried her best not to stare too hard at the scene before her. It was tough to say, at least for Fluttershy, whether she was embarrassed to walk in on her brother getting a diaper change or incredibly excited by it.

"Oh Applejack! You're not interrupting anything! Just changing your baby brother's diaper!" Mrs. Cake explained so casually, even going as far as to lift Mcintosh's muscular hind legs up into the air to show off the backside of his diaper which had become smoothly flattened by the pancaked mess inside. "Will you be staying long? Can I get you something?"

“A-ah only swung by to grab Big M-Mac," Applejack answered as she sporadically stared at Mcintosh's situation. She gulped down some nerves. "A-ah didn't know he'd still be...busy."

"Oh no, not busy at all!" Mrs. Cake chirped, "once we get this poopy thing off, he'll be all ready to go to his big boy chores."

"'Course, then he'd have ta have his cage unlocked..." Applejack muttered.

All eyes in the room turned to Fluttershy, the keeper of Mcintosh's key. The meek pegasus, never really being a fan of the limelight, shrunk back. She felt the cold metal of her key chill her chest.

"W-well I-I guess if he has chores to do..." she stammered, rolling the key around with a hoof.

"There's a good girl," Mrs. Cake praised before glancing over at Applejack.

The orange pony was caught staring at Fluttershy’s key for a little too long. Applejack always seemed so twitchy when it came to all this diaper stuff. One-on-one she'd admit to being into a lot of the stuff, but she often played with others with a hint of reservation. She always kept herself in check, never fully relaxing. And the motherly mare could read her like a book.

Interpreting all the signals she needed to, Mrs. Cake stood up from her spot beside Mcintosh and handed over the open tub of wipes. “And YOU get to finish cleaning him up.”

"What?!" Applejack exclaimed.

"If you want his help then he's your responsibility, honey."

There was a beat. Any hint of that vicarious embarrassment-excitement that once hung on Applejack’s face was now replaced with a pale faced sickness. She enjoyed wearing diapers, that was obvious, but messy diapers, whether it was wearing or changing was something she was firmly not into. It was the texture and the smell, that repulsive smell. Even wet diapers were sort of pushing the earth pony’s limits. At least wet diapers had that glowing warmth that hung under you like a weighted blanket. At least wet diapers didn’t cling to your fur and smear everywhere.

Her eyes darted between the tub of wipes and Mcintosh for a moment. There was a clear indication in her eyes that she wanted to outright refuse. Changing her older brother’s stinky diaper. It was a chore she would have very much preferred not doing. But Mrs. Cake had a knack for convincing others to do what she wanted.

In the end, Applejack just silently nodded and grabbed the container of wipes out of Mrs. Cake’s hooves.

Opening the diaper unveiled a terrible, sour stench and the squishy insides of the messy diaper Mcintosh had been stewing in this whole time. What didn’t cling to his muscular backside was smushed all around the back of the diaper, leaving very little of it clean. Above the awful, brown pile of muck sat the stallion’s caged junk, which despite the embarrassing fact that he was getting his diaper changed by his little sister - and the fact that the cage was still firmly locked around it - throbbed ever so subtly behind its blue plastic binding.

Applejack recoiled at the mess, already growing a little green around the gills. “Ugh, did you really have to get it so...full?”

Mcintosh didn’t say anything, but Fluttershy noticed an ever so subtle smile grow on his face as he silently leaned back and spread his legs further apart. It looked like a sort of vengeful role reversal for all those poopy diapers he had to change when the pair were kids.

Doing her best not to breathe or look directly at the mess plastered all over her older brother’s backside, Applejack pulled up her first moist wipe and went to work. Wipe after wipe, she cleaned - or more accurately scraped - the mess off of the stallion’s rump. Under Mrs. Cake’s watchful eye, she made sure to give the area a thorough cleaning. She used a dozen wipes to clean up the mucky mess that covered Big Mcintosh’s rump from end to end. Progress was slow and there were a couple times when she had to lean away from the scene to catch a breath of the freshest air she could manage, but progress was progress.

Once the diaper was safely disposed of into the pail, Applejack allowed herself to take a deep, open mouthed breath. The pungent stench still hung in the air long after the diaper was gone, but sometimes she managed to catch a whiff of the fresh lemon scent of cleaning products. She found a little bit of solace knowing that the smell of poopy diapers wasn’t forever burned in her nostrils.

"There, that wasn't so bad, was it?" Mrs. Cake cooed once the other mare recovered, "Fluttershy dear, would you care to unlock our little diaper boy's cage now?"

Again, everypony looked at Fluttershy, hanging in anticipation of her next decision. No one hung on the suspension more than Big Mcintosh, who silently begged with his eyes. After a long, drawn out pause, Fluttershy finally nodded shyly, emerging from her spot against the wall with the key shining in the afternoon light.

All eyes followed her as she glided up to Mcintosh who whimpered quietly in frantic hope. His legs splayed out wider now, his freshly cleaned chastity device gleaming in the sunlight. He was SO ready for this and only prayed that he had earned the right to be freed of his chastity.

The key slipped into the device’s lock, clicking loudly in the still room as it opened with a single twist. The hunk of plastic fell to pieces without the lock, disassembling itself around the stallion’s ready cock. Mcintosh let out a sheepish sigh as he went back to staring up at the ceiling. Gone were the painful bindings that constricted and kept his boyish instincts at bay. Now he no longer had to wince every time arousal became too strong.

Free from the cage, Big Mcintosh’s cock immediately grew in length, springing up at attention between his legs. Fluttershy’s eyes grew wide at the spectacle. Turns out the stallion was much more...endowed than she gave him credit for. One massive trunk of a dick stood high between his legs, accompanied by two large orbs that swelled from a weekend’s worth of teasing and edging. He moaned with relief once the whole thing unfolded. It was an immense relief, almost a pleasure all it’s own.

“Might be a good idea to take care of...that before you waddle on home, sweetie,” Mrs. Cake said, eyeing the throbbing length that twitched at the ready. “I’m sure I can dig up something our little diaper butt can play with so that he’s not walking home with a stiffy,” she went on before looking up at Applejack and Fluttershy, “unless anypony else wants to help him out...?”

“C-Could -I- do it?” Fluttershy suddenly found herself saying. The words seemed to slip out of her mouth at that very moment. She bashfully looked around the room, noticing Applejack opening her mouth to say something, before closing it back up before taking a shy step back..

“Well you are his keyholder,” Mrs. Cake reasoned, “it’s up to you, sweet roll.”

She glanced over to Mcintosh and then back at Mrs. Cake. “I-I would l-like to...v-very much...”

“Well how can I refuse such a polite little pony,” Mrs. Cake smiled, nudging Applejack - who at this point appeared to have petrified herself by blushing too much - out of the area around Mcintosh, “then he’s all yours, honey.”

Fluttershy’s eyes switched between Mcintosh’s eyes and his...natural endowment as she kneeled beside the stallion. Their eyes met and a new kind of energy buzzed between the two. He watched her with intense and eager eyes, practically beckoning her over with his stares alone. His shivering only intensified as Fluttershy’s head slowly lowered closer to his throbbing cock. She leaned in so close that he could feel her breath on him. His hooves dug into the carpet as he held onto what minute amount of self control he still had left.

Fluttershy tested things by tentatively running her tongue up the length of Mcintosh’s member. It tasted sweaty and musty with a faint urine saltiness to it. From the base near the balls to the very tip that glistened with pre-cum, her tongue slicked across the veiny, heated surface, punctuated at the end with a little, dainty kiss on the tip. Her tongue danced around the head, moistening the whole thing up and sopping up the salty sweet beads that gathered around his throbbing tip.

Mcintosh could only moan and quiver under Fluttershy’s touch. He was like puddy in her hooves. After spending so long being so bottled up, he shamelessly moaned and grunted, whimpering like a puppy. Every tiny little sensation felt like firecrackers to the unrestrained stallion. It was enough pleasure to make any pony get carried away.

And carried away he did.

Not ten minutes after Fluttershy had started, Mcintosh pulled in a sharp breath. Seconds later his cock tensed up before spraying its load high into the air. The sticky strings arched in the air before raining back down on the unsuspecting ponies, tagging Mcintosh’s fuzzy belly as well as Fluttershy’s long pink mane.

Fluttershy could only blink at the sight as she leaned back. A splotch of semen matted a section of her mane and pulled it closer to her forehead. “Oh...” She could only say, surprised, puzzled, and a little disappointed. Was that it? Was that what all this was building up to? Was she teasing him too much? Should they have really moved on to...bigger things? Did semen stain carpet?

She didn’t have too long to worry about this because soon after Mcintosh’s climax, the stallion returned to the world of the living. He panted and quivered as he rolled off his back and wordlessly motioned Fluttershy to follow through. The two of them stood up and he then slipped behind Fluttershy. By then his cock, powered by a healthy stallion stamina, was stiffening up again, ready for round two.

Mrs. Cake and Applejack meanwhile stood quietly at the door, waiting patiently for the two mischievous foals to finish up. Mrs. Cake looked at the adorable sight like any caring mother would. Meanwhile Applejack never seemed to stop blushing and, despite her nervous and secondhand embarrassment, watched the whole thing. Although, she seemed to be enjoying it as far as Fluttershy could tell, because she was quick to notice the insides of Applejack’s thighs were growing slick with moisture.

Big Mcintosh’s advances started with pushing Fluttershy’s diaper aside. The chilly outside air tickled the mare’s butt as the diaper moved away to reveal her moist, pink pussy. Thoroughly lubed up by Fluttershy’s spit, Mcintosh slipped into her with no problem at all.

Fluttershy gasped as the large, girthy mass pushed into her. Her back legs twitched as butterflies began to dance in her stomach. The massive cock filled her up to the brim as she shivered with pleasure. Big Mac slowly pushed into her, slipping inch by inch until he could go no further before pulling back out. That thrust was followed by another and then, after a hesitant pause, another.

Fluttershy moaned amidst her gasping, or at least tried to, however any moaning that came naturally out of her lustful advances came out as more of a squeak. But at least they were pleasure filled squeaks. To be overtaken by such a big, burly stallion was intoxicating. She had never felt anything like it. The fullness of his cock. The painful pleasure each time it slid in and out of her. Even the diaper nestled against her crotch, an otherwise forgotten accessory, encouraged her along by pressing against her with every hump.

Meanwhile Big Mcintosh was in seventh heaven, grunting between clenched teeth after every thrust. For so long his stallionhood was kept locked away, but now he was free to dive into whatever sexually craved impulse his body screamed for. There was a vigor in his motions. An electric energy that drove his advances with passion and power.

The pair remained close to each other’s embrace for what felt like an eternity. Every thrust was filled with pleasure and every breath they took tingled with a dozen bolts of electricity. They slipped into a pulsing pattern, thrusting, panting, and the intermittent moan. Big Mac’s cock shlucked slickly in and out of Fluttershy’s slit, ridgid and sure. Meanwhile Fluttershy fought against gravity as her forelegs quivered under her weight from the potent pleasure that empowered every inch of her sensitive body.

Finally before long, Mcintosh’s body shook and his breath shivered as a hefty load of white cum came shooting out of his cock. Fluttershy gasped as she felt her pussy fill up with the sticky mess, serving as just the trigger her body needed. Her muscles tightened up in response, her breathing cut short, and finally her body erupted with euphoric pleasure, further adding to the sexual juices that coated the inside of her soggy diaper. She emitted something of a gasping moan, rather louder than she was used to, and dropped to the ground in weak exhaustion.

Meanwhile Mcintosh huffed, quivered, and twitched as he was left almost comatose from the earth shattering orgasm. His spent penis throbbed in the final throes of his afterglow, softening quickly once its load had been thoroughly exhausted. His heavy breaths heaved as he slowly pulled his stallionhood out of her warm pussy before collapsing to the ground. Now, after his second try at it, he was finally satisfied.

Fluttershy’s legs felt like gelatin as happy sighs flowed out of her open mouth like a gentle stream. Her body continued to buzz as her mind remained foggy in her bliss filled afterglow. She was only distantly aware of the world around her now. The voices around her were muffled, obscured by the glittering warmth of her recovering body.

"Theeere's a good boy," Mrs. Cake chuckled amidst the fuzzy afterglow. "Gosh, he really needed to go, huh? You can take him home now, Applejack."

"O-oh! Y-yeah...I-I'll just go ahead and...take him home...for those chores..."

Fluttershy remained where she laid, with her face pressed into the soft carpet and her rustled up diapered butt hanging in the air. Even if she wanted to, she couldn’t budge an inch. She reveled in euphoria. An unmatched satisfaction she had never had the pleasure of experiencing before.

"A-alright Big Mac, let's...get ya home," Applejack said, helping the larger stallion up onto all four feet.

In his momentary daze of pleasure, Big Mcintosh was practically asleep on his feet. He could just about stand up straight, but his balance was right on the edge of fault. There were times Applejack had to lean her entire weight up against the lethargic stallion, directly his slumping body out of the room. All the while he wore this fog brained smile on his face.

“Be s-seeing ya, Mrs. Cake, Fluttershy,” Applejack managed to stutter out as the two left.

With the Apples gone and well on their way back to the farm, Mrs. Cake tended to Fluttershy who continued to lay frozen with her butt hanging high in the air. She took this moment to smooth out the filly’s wrinkly diaper and repositioned it back over her bottom.

“Bathtime for little fillies,” Mrs. Cake cooed shortly after before helping Fluttershy up to her feet.

Author's Note

Well, I rather like how this chapter turned out. It's certainly been building up to this point, hasn't it? I'm surprised this little idea got us TEN CHAPTERS worth of content! I hope everyone's been enjoying it so far!

I feel this story has maybe one or two more chapters left after this, just to wrap everything up that's already been put on stage into a neat little bow. It's a good stopping point and I feel the story has reached a logical conclusion. Fluttershy has learned more about a new side of herself and figuring out how this affects her life outside of the party has some potential for sequels down the road. I don't know what those sequels would involve or when I'll actually get to writing them, but it's something to think about in the future!