Spike stared blankly up at the ceiling as he lay motionless in bed, trying desperately to think of something interesting to do with the rest of his time. Preferably something that didn't also involve making another big mess. It would likely be a while before he could safely leave his room without arousing any suspicion. There was also little chance that he'd be getting back to sleep either after all that either.

Looking around at the inside of his room, his eyes lingered on a few of the posters hanging from the walls. One, in particular, scored most of his attention. It was a pinup, one he'd gotten from a vendor at a 'reading convention' a couple of years back. It featured none other than his favorite action comic book superheroine: The Masked Matter-Horn! in all her glory. The spandex-suited mare was posed seductively over a dark city backdrop, with her hands resting on her hips as she grinned slyly at the viewer.

Technically, the character was originally from a for-kids comic that he used to read when he was younger, but this poster was from a much more recent reboot that had started to take off right around the time he hit puberty. The latest issues were catered to a strictly adult audience, usually carrying some erotic twist alongside the usual cheesy crimefighting goodness that made the old series the best superhero comics of all time. At least in his opinion anyway.

The main six characters, The Power Ponies, had all been suitably aged up from their original underage incarnations, and their spandex suits were tighter and sexier than ever before to match. Launching about two years ago, on the very same day he'd turned 16, the new series had been a smashing success with the now grown-up target audience of the original.

Getting excited just thinking about it, Spike turned and reached down into his bedside table. Pulling open the bottom drawer, he fished out the latest issue: The Masked Matter-Horn And The Desperation Dagger!. The cover depicted the normally proud and heroic unicorn hunched over in a dark alleyway. Both her hands were stuffed down into her crotch as she looked up at the reader with a distressed and desperate expression. Glistening wet trails were running down her legs as urine gushed through the mare’s fingers, and a small pool of piss steadily grew out around her feet.

Watersports was a pretty standard theme for most erotic media these days, but it remained ever popular given the sight of a mare pissing herself wasn't all that unrealistic. It was a well-known fact that, upon reaching the seemingly magical age of eighteen, a large majority of mares would very quickly and mysteriously find themselves without a good portion of both their bladder and bowel control. As was often the case, many wouldn't even feel the need to go until they were already desperate and usually far too late to get to the nearest bathroom in time.

Though many regarded this spontaneous and nonsensical biological quirk as a disability of sorts, this was kind of just how things had always been. Large parts of Equestrian culture had become centered around the strange phenomenon. Most mares still found it embarrassing or at least a little shameful to regularly have accidents, though some had come to embrace their newfound incontinence.

His big sister was one such mare. At least while in the privacy of her own home, she often had no issues with just 'letting go' whenever she felt the slightest of urges, especially if she happened to be far too busy doing something to be bothered with a trip to the bathroom. She’d told him countless times that she just found it relaxing, but if her recent activity was anything to go by, there was a little more to it than that. If nothing else, he certainly didn't mind it. Many stallions could only dream of being in his unique position.

That all being said, Twilight despised the unwanted attention that an accident usually drew in public. Yet, for whatever strange reason, she never seemed to mind letting loose in his presence. Not that he was complaining, of course...

Twilight stared off into space through the large window of her study, her head resting on her palm as she sat in her favorite reading chair. A small stack of papers and colorful sticky notes stood on the small round table beside her while a quill floated motionless overhead.

She was supposed to be going over this week's future schedules one last time to make sure everything was correct and up to date, but every time she'd tried to focus, her mind kept drifting. Ever since being forced to give up on her little investigation, she'd been unable to think about anything else.

One crazy theory, in particular, continued to dominate her thoughts. It was technically possible that it actually had been Spike who was spying on her. For some strange reason, just the notion of him watching her masturbate filled her stomach with butterflies. Yet it made no sense! After all, It's wasn't like he’d ever look at her in that kind of way... right?

"Ugh, why is this getting to me so much!" She groaned, massaging her temples.

'He was sound asleep when I checked on him, so why do I keep thinking about this!?'

*Groowwll*

"Ugh, maybe I'm just hungry..." She thought, her rumbling stomach a very welcome distraction from her brain’s ridiculous theories.

Rechecking the time, the clock now read 7:41. The shipment of books from the princess would hopefully be arriving on time this month. Some of the mail ponies had a habit of taking their sweet time with her deliveries.

After that, Spike would probably be emerging from his 'dragon cave' as he was usually awake right in time for breakfast. She hoped he'd be willing to fix them up something good this morning.

'I wonder if he's heard anything strange lately...'

But as Twilight pulled her hand away from her face, she felt her index finger stick for a moment. Curious, she inspected her hand and was surprised to discover some strange white substance attached to the tip of her pointer finger. How had she not noticed that before? And where did it even come from? Bringing the spot up to her nose, she gave it a quick whiff. It smelled just like... cinnamon?

*Grrooowwll*

Her stomach growled at her again, tempting the young unicorn to give it a lick. Hunger eventually got the better of her, causing her to shrug before promptly lapping the strange white stuff off her fingertip.

'Hey, that's pretty good! Hmm... I wonder if Spike knows how to make cinnamon rolls...' She thought, idly sucking on the digit in hopes of finding a little more of the delicious white stuff.

Getting up from her chair, she put her schedules back into their designated drawers and made her way towards the winding staircase that leads down to the main floor. As Twilight started down the broad steps, she began to notice just how dusty they were getting.

She didn't go down to the main floor very often these days as there were just far too many open windows that often left it feeling chilly and windy. There were a couple more floors further down as well, but she didn't use them for much of anything besides extra storage space. The kitchen was down there too, though she didn't visit that herself much either.

Oh, the number of times she wished she could find whoever designed this weird place and give them a piece of her mind. The whole tower seemed like it was built exclusively with a pegasus in mind. The 'front door' was at least three stories up, with a long staircase spiraling down around the building towards the ground. It was often a workout just trying to get inside.

"Especially when somepony is in a hurry..." She grumbled, mentally skipping past a few rather embarrassing recent memories.

Finally reaching the 'ground floor,’ Twilight glanced up at the little shelves she'd placed near the front door around the time they'd first moved here from her parent's place. With most of her favorite books upstairs, she could hardly even remember what else she'd left to gather dust on this level. With a shrug, she floated one over at random, blowing a cloud of dust off its face. Glancing down at the book's cover, her eyebrows upon her reading the title.

’A Brief History Of The Wagon Harness. Huh, I don't remember even owning this, much less reading it...'

Curious, she plopped herself down by the front door with the book in hand. If nothing else, it would help pass the time while she waited for the mailpony to arrive...

*Knock, Knock, Knock*

Twilight jumped as her reading was interrupted by the sound of somepony knocking at the front door. Getting up and peering through one of the glass windows, she spotted a large cart full of books parked on the landing.

Checking the window on the other side, she finally spotted the delivery pony. She'd never seen this particular mailmare before. Most of the mailponies that delivered around here knew her pretty well at this point, so it was kind of strange seeing somepony new for once.

Stepping back from the door, Twilight turned the handle with her magic and swung the door open. Standing idly on the other side was a grey pegasus who was staring down obliviously at her clipboard, apparently not realizing that her knocks had been answered. It took a moment and a quick clearing of the throat from Twilight for the mare to finally notice.

"Oh! Hello, Sir or Madam! I, Derpy Hooves, am here today to deliver you your mail!" The mailpony declared proudly, fluttering her wings and posing dramatically.

She was wearing the standard Canterlot Postal Service uniform, though how she'd put it on caused Twilight's right eye to twitch and a slight blush to rise on her cheeks. The uniform's female version typically consisted of a grey button-up collared shirt, usually cropped about an inch above the belly button, and a blue skirt and a small mail carrier cap.

It was a pretty standard style of uniform, employed by many delivery services in and around Canterlot. The colors and logos generally were the only things that got changed. While it usually only showed off a mare's midriff, 'Derpy' happened to be showing quite a bit more than that.

Her top was one too many sizes smaller than what she needed. Instead of stretching down to just above her belly button, the hem only reached the bottom of her ribcage. As a result, a substantial amount of underboob was peeked out along the bottom. To make matters worse, seemingly every single one of the buttons had been put through the wrong holes, leaving it looking messy and crooked. Significant gaps between buttons made it clear that she had also not worn anything underneath either.

If all that wasn't enough, her skirt was incredibly short, maybe only three or four inches at the most. Due to this, Twilight could also quite clearly tell that she was missing yet another somewhat important article of clothing. Though, based on how badly she'd buttoned up her shirt, Twilight wasn't sure if this mare had even realized it yet. The unicorn's blush darkened as she imagined how many other ponies must have caught a glance up at this mare's sensitive bits as she flew over them.

'Well... at least she got here on time.'

"Ahh... h-hello. Are, um, are all of these books from Princess Celestia?" Twilight asked, trying not to look down.

"Yes, mam!" Derpy replied optimistically, bouncing and fluttering her wings. The stretched buttons of her shirt strained as her giant boobs jiggled around within them, threatening to give way at any moment.

"Well, uh, alrighty then. Thanks for being on time." Twilight murmured, reading off the titles of her new books as she floated each of them inside one-by-one.

"You're very welcome, miss! Now, I must be off! I have many more essential deliveries to make to many other ponies in need!" Derpy announced heroically, swirling around and leaping into the air... only to then fly straight into another nearby house just a few seconds later.

Twilight wasn't paying any attention, though, as she continued to look over each of her brand new books. Already, she'd begun to notice a similar theme among their titles. Elementals And Where To Find Them, Finding Lost Relics, The Science Of Enchanted Items, etc. Her upcoming test would no doubt involve something related to them all.

However, one of the books stood out from all the rest, primarily because it didn't seem to have any title whatsoever. The cover featured a golden unicorn from the neck up, with small decorative golden swirls in each corner, yet there was no label anywhere.

'What's this one supposed to be?'

Looking down into the cart, she found the list that generally came with each of these shipments and began going through it, matching each book she'd received to a name on the list. But upon reaching the end, she was puzzled to discover that there was no mention of this mysterious book anywhere. Everything else was already accounted for.

'I think I might bring this one with me when I have to go out later today. Maybe that'll shed some light on this mystery. The Princess might be forcing me to go outside, but that doesn't mean I can't at least bring a book to read!'

Satisfied, she looked up to thank the mailpony, only to find her long gone. Gazing back at the cart, she could still see several other packages inside.

'Wasn't she supposed to take this with her...?'

"Whew... that issue never gets old," Spike sighed as he stuffed his comic back into its special drawer, having re-read it for what must have been the millionth time since he bought it.

Turning to look out his window again, it seemed to be a fair bit later in the morning now; thus, it was probably safe for him to leave his room. He was getting pretty hungry anyway. Jumping up out of bed, Spike rummaged through his small dresser drawers and quickly threw on a pair of tan cargo shorts and a simple green t-shirt. He didn't consider himself a particularly fancy dresser by any means.

Exiting his bedroom, he spotted Twilight standing in the middle of the study; her eyes closed while numerous books floated all around her. Many were exchanging places with others on different shelves. She still had on the same clothes as earlier, evident from the damp stains running down the insides of her legs.

"Morning, Spike." Twilight greeted, though her somewhat irritated tone made Spike take pause. She hadn't even opened her eyes to look at him yet.

"Er, good morning Twi." He greeted back, suddenly feeling a bit worried.

"Spike. I have a very important question for you." She said, suddenly dropping every single book she had been holding at the same time as she turned her head towards him. Several hardcover novels crashed to the ground, seemingly emphasizing the intense expression on her face.

"A question that could very well change our relationship for the rest of our lives together."

She stomped towards him, suddenly grabbing him by the collar with her magic and yanking him down until they were both face-to-face. Her piercing purple eyes stared straight through him, threatening to peer into his very soul.

'Does she know?! Shit! What do I say?!' Spike thought, internally panicking.

"L-look Twilight I—"

"Spike!" She suddenly boomed, interrupting and startling the fire-breathing dragon back into silence...

"Can. You. Make. Cinnamon Rolls?"

"..."

"...What?" Spike mumbled, his panicked brain coming to an abrupt halt as he tried to process Twilight's odd question.

"I am having a ridiculously huge, and so far unexplainable, craving for cinnamon right now! I need to know if you can make us Cinnamon rolls!" She quickly explained, finally letting go of his collar as she began ranting at her dropped books.

A wave of relief washed over Spike as Twilight continued raving about her latest spontaneous craving. She'd looked more serious than he'd ever seen her before. Even more so than in the last few days leading up to a final exam.

"Uhh, y-yea...I think I can do that, no problem." Spike answered sheepishly, still a little fearful in case this all turned out to be some strange ruse.

Twilight's face brightened instantly at his response, looking as if he'd just told her the most fantastic news she would ever hear in her lifetime.

"Yes! Oh, thank you so much, Spike!" She cheered, lunging forwards and wrapping him up in a tight bear hug. Her soft, plump breasts squished up against his scaley chest, causing him to blush as she nestled her head into his shoulder.

"Um, oh yeah, no problem at all." He replied, awkwardly returning the unexpected but certainly not unwelcome embrace.

"Alright, well, you let me know the minute that they are finished. I'm absolutely starving!" She exclaimed excitedly, breaking away and returning to her book sorting; an adorable smile stretched across her muzzle.

'I swear Twilight, one of these days, you are actually going to give me a heart attack...'

With one last sigh of relief, Spike turned and headed down to the kitchen to start making them breakfast. He hoped that one of the cookbooks they had could teach him how to make cinnamon rolls. Honesty, he had no idea where to even begin, but the idea of ruining the adorable excitement bubbling from his older sister seemed like a crime...

Author's Note

Fun Fact Of The Chapter: Derpy is very adorable.

EDIT 5/1/2019: Made some revisions.