“Spike!” Twilight called, her voice ringing through the empty library. An encyclopedia of magical plants floated back to its rightful place back on the shelf.
A young purple and green dragon dashed down the stairs and stopped in front of the purple unicorn. He quickly snapped a salute in acknowledgement of her call. “Yes?”
“Okay, I want you to go to Canterlot and get these books from the Royal Archives,” Twilight said, levitating a scroll from a nearby into his hands.
“On my way!” Spike said, grabbing the scroll and a saddlebag that had been modified to fit the dragon as a backpack.
As soon as the door closed, she quickly locked the front door and switched the sign to read “closed”. Twilight shivered with excitement; it had been months since she had enough free time to indulge in her little “habit”. She knew how she gained this attraction to diapers. Several years ago, when Spike was just a hatchling, a powerful surge of magic from a spell that went out of control reduced her level of bladder and bowel control to that of a foal. After many attempts at trying to reverse the spell, use of multiple potions and several embarrassing accidents – including one where she accidentally left a puddle at Celestia’s feet – Celestia and her parents simply resorted to the most obvious solution, diapering the unicorn as if she were a foal. Those months had been utterly humiliating to her, despite the fact that Celestia and her parents acted the same as before – with the obvious exception of discreetly asking her if she needed a diaper change. Luckily, the effects of that misfired spell wore off and she was able to resume her life as normal. But, the lure of diapers never left her mind. But she was unable to indulge in that desire until years later when she moved to Ponyville.
She telekinetically reached underneath the front desk of the library. A large non-descript box levitated out, surrounded by the magenta glow of her magic. She then used her telekinesis to open the box and levitate out the contents: a small colorful cardboard box that advertised its contents in white letter shaped clouds: Soft Cloud® diapers for her (size XXL - teen); some wipes, a container of foal powder and a tube of diaper rash ointment floated out from the box.
She looked around to make sure the library was empty. Nopony present. Good.
The purple unicorn dusted her rump with the foal powder and applied the ointment. She inhaled the scent of the foal powder; it was a scent as intoxicating to her as the scent of a new book. Next was the best part: the diaper. The plastic and cloth garment floated along the ground as it unfolded. She moved the diaper between her hind legs and bought it upwards, taking care to thread her tail through the hole in the back. She then bought the front of the diaper upwards and taped the whole assembly up. When the diaper snugly secured around her waist, she looked in the wall length mirror to the left of her bed. A blush crept across her face as she admired herself. The diaper hugging her waist was printed with stylized clouds on a light sky blue background.
Now that she was diapered up, she proceeded to the next logical step – using the diaper. She went in the middle of the library where the floor was wood and there was no paper around and spread her legs slightly. She blushed as she realized what a naughty thing she was preparing to do. Her tail lifted slightly as she tried to relax her bladder – a fairly hard task considering the fact that she was essentially relieving herself in the middle of the library. She continued concentrating and her efforts were rewarded when a warm trickle of urine flowed into the thick, fluffy diaper. She pushed harder and the trickle soon became a flood. She smiled as she felt the diaper swelling and pushing up against her rump as she continued relieving herself.
Several minutes later, when Twilight Sparkle had emptied her bladder, she looked over her shoulder; a very thick and very wet diaper swaddled her hips. Her diaper was so swollen with her urine that her hind legs were slightly forced apart, forcing her to waddle.
"Wow, I really shouldn't drink this much cider so early in the morning," she said with a giggle as she looked between her hind legs; the front of the diaper was visibly sagging and there was a fairly obvious bulge in the back of the diaper. She then waited a moment to ensure that the diaper had absorbed everything. She then sat down with an audible squish, causing her hindquarters to sink into the soft, warm and squishy padding. "At least Spike isn't here. Ahh. There’s nothing as comfy as a warm, squishy – and wet – diaper," she thought. Out of curiosity, she pressed a hoof against the front of the diaper. She blushed as the pee-soaked padding pushed against her fur; it felt so good but at the same time, it was so naughty!
She closed her eyes and smiled as she reveled in the innocent foalish bliss a wet diaper offered her. She was snapped out of her reverie when she heard the library’s lock click. She had forgotten that Spike had a key to the library! How could she explain away the fact that the room smelled like a combination of foal powder and wet diaper? Let alone the fact that she was wearing a very, very wet diaper? Twilight didn’t have time to ponder these questions as the door opened, revealing a mobile pile of books with two draconic legs sticking out from underneath.
“Twilight! I’ve got the books!” Spike said from behind the pile.
“Good. Now can you organize them by alphabetical order and subject?” Twilight said. She had hoped to give Spike some work so she could clean up and hide her supplies.
As soon as the dragon had stepped into the library, he was treated to the pungent odor of wet diaper — a scent that he knew too well from babysitting Pumpkin and Pound Cake. “Whoa, Twi, it smells like the Cake twins’ room in here! Did somepony have an accident?” Spike said as he waved a hand in front of his nose.
Twilight blushed deeply. The wet diaper was starting to get a bit clammy now. Luckily, Spike couldn’t see her. “Erm, that’s just some potions in the basement!” Twilight quickly lied.
Spike sighed. “Look, I can’t concentrate with the odor in this room.” He put down his pile of books. As soon as he did so, he spotted his employer/friend, Twilight Sparkle wearing, of all things a diaper – and one that was quite obviously wet. Several awkward moments passed before Spike burst out laughing.
“Spike! Stop! This isn’t funny!” Twilight scolded as she crossed her forelegs in front of her in a vain attempt to hide her wet diaper.
“Okay, Twilight Leakle, I’ll stop!” Spike said as he wiped a tear away from his eye.
“Spike!”
“Okay, I’ll stop this time for real,” he said. “And I think I should write a letter to Princess Celestia about your bladder issues; she may be able to help.”
He grabbed a scroll and a quill, cleared his throat and began to speak while he made scratching motions with the quill.
“Dear Princess Celestia, today, I learned that Twilight Sparkle has bladder problems. And has apparently decided to manage it by wearing an article of clothing associated with foals – diapers. I also learned that there are multiple ways to manage said condition and that mocking someone for it is wrong. Signed, Twilight’s Assistant Spike.”
Little did Twilight know, he didn’t actually write anything down. Nevertheless, he has succeeded in angering her.
“There, now Princess Celestia can hopefully help you with your condition,” Spike said as he placed the quill and scroll aside. He then took a moment to throw in another humiliating jab. “And I think Baby Twi needs a fresh diapee," he said, switching to a childish tone he used when he babysat Pumpkin and Pound Cake.
Twilight smirked; she had the perfect way to punish Spike for making fun of her. "Why yes, Twi does need a new diapee," she said with a smile.
Before Spike could protest, a fresh diaper, a pack of baby wipes, some foal powder and diaper rash ointment were forced into his hands. He then stood aghast as Twilight rolled onto her back and raised her forelegs into the air — much as the Cake twins did when Spike had changed their diapers. He put down the supplies and backed away from the insane mare. Almost immediately the items were forced back into his hands.
"Spike! My diaper’s cold and clammy and I'm starting to get a rash! Hurry up and change my diaper!" Twilight barked.
Spike groaned and headed over to Twilight in preparation to change her diaper. Spike groaned; changing an adult pony's diaper was not something he looked forward to. He the noticed the small, partially opened box of Soft Cloud ® diapers for her (size XXL - teen) lying next to the front desk. “Great, instead of helping Rarity did up gems, I’m stuck changing Twilight’s diapers as if she were some foal!” he fumed as he undid the tapes on Twilight’s diaper.
He then sighed as he grabbed some baby wipes. “On the plus side, he thought, maybe I can blackmail Twi with the fact that she likes wearing and using diapers for fun,” he thought. He then started wiping down the overgrown unicorn foal’s bottom. “If I don’t die of embarrassment before the day’s over.”
