Author's Notes:

This chapter prompt was suggested by a Patron who goes by the name STOPOPPRESSINGME from my Official Patreon Page.

Due to Twilight’s busy schedule for that day, as well as the errands Sunburst and Starlight had to attend at the same time, their experimental research in their Surveillance Room had to be delayed until later that night. Because of that, none of the voyeuristic ponies were able to witness that unusual threesome that occurred within Rainbow Dash’s cloud-made home; although, despite what Twilight and Discord may have seen from that one alternate universe, it was doubtful that their surveillance spell would’ve been able to peep into the pegasus stallion’s living room during that moment anyway. While it was unclear what the limits of the spell’s privacy filters may have been, Twilight was still confident that the parameters of that magic wouldn’t peer into private spaces to record anything that could break Equestrian laws. And fortunately for many of Equestria’s more adventurous citizens, those limits were intended to keep the surveillance magic from peering into public restrooms as well.

Despite the anatomical difficulties that came with most quadripedal species, one phenomenon that was surprisingly common throughout many of Equestria’s seedier regions were the practices of casual sex through walls; or as it’s more commonly known to many of their users, ‘Glory Holes.’ Even though it wasn’t particularly easy for a species with four legs to stay braced up against a wall for some fun, the thrill of receiving carnal pleasures through purely anonymous means was something many have found ways to work around. Of course, due to the necessity of being adaptable to find pleasure in such an unfamiliar position, there was one specific species that flourished when it came to glory holes: Changelings.

Up in the Equestrian capital of Canterlot, one particular Changeling (who went by the name “Bob” for simplicity sake) had gartered quite the reputation when it came to his discrete work. Not only was he able to amass an impressive amount of bits on a daily basis to live comfortably in such a high-end city, but his work was popular enough to give him access to certain unexpected places. One of the prime locations Bob used to provide his services happened to be in Canterlot Castle itself, which gave him the most income without much scrutiny. Despite the castle’s massive security measures put forth by Shining Armor, the Changeling was able to work freely within one of the bottom floor restrooms due to his diligent reputation, as well as a few well-paid bribes among Guards and Nobles alike.

Unlike the Crushed Grape in Ponyville, the glory hole that Bob used was tremendously better kempt and more inconspicuous. Even though he still needed to place an ‘Out of Order’ sign over his stall door while performing his services, each stall happened to have a hidden sliding door for the glory holes on both sides so he could change between places without notice. When the door was closed, all that ponies could see was a smooth and unaltered wall while they did their business; but if the stall happened to be one for Bob to provide his services for, an open slit would reveal a well-sanded hole for whatever member he was willing to take form of, as well as an odd sign that hung beneath the opening: ‘Warning: Do NOT ask to be bred if you do not want a child.’

Many of Bob’s customers were fortunate enough to follow that rule without question, even though it was debatable how seriously the Changeling took it.

On one particular day, Bob was seated on top of the closed toilet lid while reading through a trashy romance novel, scoffing a bit from the monotonous and vaguely detailed descriptions. Unlike most other Changelings, Bob chose to take the form of his old chitinous self whenever he was alone; even though he didn’t dislike his revamped form, which was composed of a stunning pearlish blue coat that reminded him of raspberry candy, he preferred his older form for the sake of comfort. However, the moment that he heard the restroom door open and close, Bob sat up for attention as he put down his book, and overheard those clopping steps growing louder.

He wasn’t able to see who walked into the stall beside his own (something he prided himself on maintaining for everyone’s privacy), but he could catch the scent of a distinctly vintage perfume. The pony, most likely a mare, entered the stall neighboring his own while the hidden door was closed, and only waited a moment or so before giving three soft knocks. Bob smirked to himself, happy that the pony knew of that greeting to give herself consent for some action. The changeling got himself up from his spot before he placed a small metal bowl near the wall on the floor, and then used his magic to slide the hidden door aside and reveal his glory hole. He also floated out the small sign that hung beneath the opening, which elicited a brief “Huh?” through the other side.

Over on the other end of the stall, Princess Luna scoffed with a roll of her eyes while she sat with a notable blush across her cheeks. After following Princess Cadance’s recommendation, the Alicorn decided to add to her Pre-Retirement Bucket List with more… mature entries that her sister was left unaware of. Among some of those new additions, which included things like egging somepony’s house and smoking marijuana (which she ended up liking much more than expected), the prospect of using a glory hole was definitely something that caught her attention. And after receiving a couple high recommendations from a couple of her personal Guards, Luna decided to try this particular stall for the thrill of it; the Princess may have had a semi-serious relationship with Starswirl the Bearded, but she was sure he would understand if he ever found out about it.

After clearing her throat to help conceal her voice, Luna asked with a deeper tone, “Uhhhh… Wh-What is the, errr… protocol for this arrangement?”

Bob huffed with a roll of his eyes in the other stall, and answered in a hushed tone, “Just place your payment in the bowl, and give your request for what species you desire~”

Luna’s brows raised up tremendously, not expecting to have an option like that. However, since she was informed in advance that the glory hole was manned by a Changeling, the Alicorn shrugged after a second or two in thought. She gave a quick flash of her magic to conjure up a sizeable bag of bits, and floated it into Bob’s bowl before stating, “U-Ummm… Thoust wou--Mnnghh… I would like to request a… a gryphon, if that’s alright~”

The Changeling didn’t catch that distinct dialect the Royal pony was notorious for, and nodded with a smirk after collecting his payment. Bob didn’t say anything in confirmation to Luna’s request, and merely gave a quick flash of his Changeling flames to put himself in a gryphon’s form. The design he chose was one he had seen around Canterlot before, which happened to be a muscular brute with dark brown feathers and a tannish fur. His thick paws could be seen beneath the stall walls as he stood up on his hind-legs, and his head nearly touched the ceiling due to his enlarged height. Fortunately, Princess Luna was keeping her sights on the waiting hole in anticipation, so she wasn’t able to see anything to recognize the form as that of Canterlot’s newest star florist: Blane Clawston.

“Mnnnghhh…” Due to his countless sessions that gartered him such a high reputation, Bob’s newly-conjured member was able to grow erect almost instantly. His gryphon form included a thick, meaty-looking cock that stood at an impressive ten inches in length, and carried an especially thick knot that was bulging prominently at the base. The girthy piece of cockmeat also had a notable red color from the knot to its pointed tip, as well as several rows of thick barbs meant to titillate whomever was fortunate enough to experience it. Bob had only been using this form for several months now, but it was already a highly-requested form from Guards and Nobles alike. And as soon as the gryphon braced himself up against the wall, he heard an elated gasp the moment he shoved that rigid cock through the glory hole for Luna to fawn over.

“S-Sweet Solaris!~” Luna clasped both hooves over her mouth after that involuntary response, and blushed profusely while hearing Bob chuckling on the other end. Despite how dauntingly thick that cock may have looked, the Princess really hoped that nobody else was in that restroom to overhear her. Fortunately, since the two were the only ones present in the bathroom at that time, Luna was able to collect herself before getting back on her hooves. Even though the sight of that plump gryphon cock was tempting enough to try tasting, the Princess couldn’t ignore the incessant burning that had been building up in her loins for the past few days. So instead of taking any foreplay, Luna turned herself around so that her winking, sopping-wet marehood was on full display and pointed straight at that waiting gryphon cock.

The Alicorn may have technically been over a thousand years old, but her supple pussy looked just as pristine as something a mare in her twenties would possess. The dark blue, lusciously thick lips were already glistening from her arousal, with a couple thick drops just barely hanging from the bulb of her visible pink clit. Due to how badly her legs were starting to fidget in primal need, the Princess didn’t try for any subtleties as she pushed herself back, and pressed the tip of that gryphon cock against her waiting slit. Luna clenched her eyes shut as she shivered from the heat and pressure of that pointed tip parting her lips, but her blushed face carried a blissful expression as she tried her hardest not to moan out too audibly. “Mmmnnnnghhhhh!~”

Bob wasn’t expecting for the mare to be that needy for some penetration, but he wasn’t one to complain as he felt the soft, inviting warmth of Luna’s marehood wrapping tightly around his cockhead. A stronger moan could be heard through the stall’s wall, but the fake Gryphon wasn’t able to really ascertain that it was one of the Royal Sisters who was experiencing that bout of much-needed pleasure. Nonetheless, his talons still gripped the top of that wall tightly, and he groaned upon feeling those velvety walls caressing down the length of his barbed shaft. As Luna’s supple lips parted wider to carry that meaty girth, her moans grew more strained the moment she felt those thick barbs starting to cram their way inside of her.

“Aaaaahhhh!!~” Luna’s head reeled back as she pushed even harder, and that girthy gryphon cock pushed itself deeper between her sensitive folds. Despite how strongly her legs spasmed upon feeling those thick barbs scratching their way past her lips, the Princess couldn’t have cared less while allowing those bulbs to titillate her nerves more intensely. It had been over a millennium since she had last bedded with a gryphon, and the spine-tingling sensation of their plump and ribbed shafts was a craving Luna was more than happy to get sated. Even if she was in a public restroom with a Changeling’s interpretation of that exotic species, the Alicorn couldn’t stop moaning as more of that delicious cockmeat filled her where she needed it most. “Nnnnnfffff!~ Ohhhh… Oh, yes!!~”

Bob’s eyes opened a little upon hearing that rapturous tone of voice, and he blinked a couple times in slight confusion. Luckily for the Changeling, he couldn’t exactly pin down where he had last heard that voice, despite how familiar it may have sounded. Not to mention, it was fairly difficult for him to really focus as he felt more of that tight pussy clenching hard around his shaft, and swallowing up more of his length inch by inch. Due to how massive his choice of cock actually was, the gryphon was actually starting to become impressed as he heard the mare’s tenacious groans, and felt her continuing to push down that rod for more.

“AAAAHHH!!~” Luna tried her hardest to clench her muzzle shut after that brief yelp of pleasure, but her hind-legs were starting to quiver from how badly that girth was opening her up. But despite how stretched-out she was becoming from those thick barbs continuing to cram through her dripping folds, trickles of her arousal could still be seen dripping down the insides of her thighs to indicate her unbridled lust. The tip of Bob’s pointed member was pushing through so deeply, that the Changeling wouldn’t have been surprised if a slight bulge would soon be peeking from the nape of Luna’s slender torso. Of course, given how hard the Princess was pushing herself further down that rigid cock, Bob was certain that he would be reaching to the base of her womb if she wasn’t careful.

By the time Luna was able to shove over two-thirds of that gryphon cock inside, she had to bring her hooves up to brace herself against the adjacent wall for added leverage. Since her hind-legs were struggling to keep up her weight, the Alicorn let out a determined grunt while converting her weight against the wall so she could continue. With an especially hard push of her forelegs, Luna cried out as she rammed herself back a few inches at once, which speared open her marehood tremendously wide due to those meaty barbs. Even Bob gasped with a strong shudder upon feeling that tight pressure, clearly not expecting this mysterious mare to be that eager for some anonymous cock. But alas, even with how badly the Princess was fidgeting while stretched-out across the stall, a soft moan stemmed out from her bitten lips as she felt that hot knot pressing against her entrance.

“Mmmmmmfffffff~” Luna only needed a brief moment to collect herself, and her fur raised on end as she tingled from the sensation of those dozens of barbs pressing against her winking folds so tantalizingly well. If she wasn’t so determined to quench her thirst for a proper filling, she likely would’ve been content with finishing right then and there. But as she felt that thick knot pressing hard against her drooling lips, the Princess was not wanting that hunk of prime cockmeat to go unclaimed. So despite the fact that Bob’s knot was almost as thick as the width of the glory hole itself, Luna braced herself tightly against the wall before she gritted her teeth, and gave a tremendously hard push. “NNNNNGHHHHHH…”

“Mnnnghhh!!~” Bob’s head reeled back, which caused the tip of his jagged beak to scratch against the ceiling due to his height. But fortunately, his body remained tightly pinned against the wall as he felt that tightness immensing greatly around the girth of his knot. He may have only been using this form recently, but this was the first time he encountered any pony who was willing to try and be knotted by this cock. The intense pressure and warmth of Luna’s cunt was overwhelming to say the least, but the Changeling couldn’t complain as he heard her lustrous moans reverberating between their stalls.

“Aaaahhhhh! Aaaaaaahhhhhhh!! AAAAAAHHHHH!!!~” Slowly but surely, Luna’s tenacious pushing resulted in her marehood stretching open even more to fit that meaty knot. Her puffy lips strained close to their limits as they tried to wrap around all of that rigid cockmeat, but were showing difficulty despite how wet she was getting. Even as more of her arousal trickled out to leave a notable puddle between her legs, the Princess was nothing short of determined while trying to sate her lustrous hunger. She could hear Bob’s increasingly audible groans as the pressure around his cock grew more immense, but the lack of resistance was more than enough to allow Luna to push with all her might, and finally slip around that bulbous knot with a strained shriek of ecstasy. “GNNNNNNGHHHHH!!~”

The very moment Luna’s aching lips wrapped around the base, and she was able to pull that gryphon knot deep inside of her quivering marehood, Luna let out a very satisfied moan of pleasure while braced against the stall wall. Bob shivered in contentment as well, and his member throbbed prominently inside of that needy Royal pussy. Of course, before the Changeling could even think of moving himself, Luna took charge as she tried to pull away from the wall. That thick knot tugged against the inside of her hungry cunt, and Bob gasped as he ended up being pinned to the wall on his side. Meanwhile, Luna continued to moan rather shamelessly as she pushed herself back, and tried her hardest to get that cock moving inside of her. “Mnnnnghhhh… I… I certainly hope you’re not planning to pull out~”

Fortunately for the lust-addled mare, Bob was quick to grin obscenely before gripping the top of his wall, before he pounded his hips against his end of the glory hole to assist in Luna’s titillation. The Princess shrieked out once more as she braced back against that knot at the same time he thrusted in, which helped to give the two a good sense of timing. Before too long, Luna and Bob were starting to pick up a steady rhythm as they collided against the wall at the same time, and really tested the limits of that knotted Alicorn pussy. Even when the two pulled back far enough to stretch Luna’s marehood around the width of his knot from the outside, each moment their bodies rammed back in was enough to make the Princess shudder uncontrollably.

It was fortunate that despite how loudly the two were banging against the stall walls and moaning out like mad, not a single pony was around to enter the restroom and overhear their unsubtle fucking. Of course, that was mostly due to the fact that Luna had a couple of her Guards posted outside the restroom doors, as well as a soundproofing spell to ensure privacy. And since both of those Guards were familiar with Bob’s reputation, neither of them were too keen on interrupting their Princess’ extracurricular activities. So instead, their stoic expression remained underneath their growing blushes as they heard nothing through the magic wall, but still felt the faint remnants of their banging thrusts from the vibrations beneath their hooves.

“AAAAAHHHH!!! TH-THAT’S IT!! RIGHT THERE!!! RIGHT THERE!!!~” Luna may have been alright with being shamelessly enamored with those randy thrusts, but Bob was continuously looking back towards the door just in case the two were to get caught. Fortunately, despite how shamelessly loud the Princess was getting, Bob was able to maintain his composure well enough to keep pounding into that Royal pussy like there was no tomorrow. Meanwhile, Luna was taking full advantage of her precautionary measures, and was sinking deeper into the debaucherous pleasures she had denied herself for so long. Sweat was dripping from her face, but it was nothing compared to the torrent of secretions that were trickling from between her legs as she kept moaning deeply. “NNNFFFFF!! OH YESSSSS!!~ THAT’S IT, YOU STUD!! G… GIVE IT ALL TO ME!! TAKE ME!! FILL ME UP!! B… B-B-BREED ME!!!~”

Luna may have been too pent-up to really contemplate what she had just said, but Bob’s eyes shot wide-open in an instant. Despite how overwhelmed and over-lustrous the mare may have been, the Changeling didn’t post that rule underneath the glory hole for no reason. If somepony were to say “Breed Me” during their sessions, Bob took it very seriously. And since he heard the Princess scream out those words clear as day, that smirk on the gryphon’s beak widened quite a bit before he got to work.

Without hesitation, Bob rammed as hard as he could against that glory hole, and tugged on Luna’s cunt incessantly to leave her shrieking for more. Public restroom or not, the retinas in the Changeling’s eyes began to turn into insectoid slits while he thrusted powerfully, and his focus intensified solely on that shrieking target on the other side of the wall. Luna wasn’t able to really catch what was about to happen, but her head reeled back in absolute bliss as she felt that gryphon cock throbbing more distinctly inside of her. And while Bob continued to pound through that glory hole to fill the needy mare, his balls were already beginning to churn as they constantly pressed hard against the cold stall wall.

“Aaaahhhh!!~” Luna was already eager for a good filling, and was leaking like a broken faucet as she teetered at the very precipice of her climax with that meaty knot swelling inside of her. She could feel that rigid cock throbbing harder, with the pointed tip sinking right into her waiting womb to really titillate her senses. Her hooves were curling up with every hard pulsation she could feel against her folds, and her cunny was clenching as hard as it could against Bob’s equipment to ensure he would stay in place. And just as she could feel her own orgasm looming in from the depths of her burning loins, the Princess doubled down on her lust-addled mindset as she screamed out, “F-F-FILL ME UP, PLEASE!!! GNNNNNNGHHHHH!!!~”

“AAAAAHHHHH!!!~” Bob usually wasn’t one to grow too audible during sex, but a legitimate breeding was tantalizing enough to make the Changeling moan out hard from his open beak. With a final thunderous thrust, the gryphon’s hips collided against the wall hard enough to nearly break it in half. And as his balls churned hard while pressed painfully tight against the wall, his cock throbbed rigidly to unload that heavy torrent of virile Changeling cum right where it belonged. Luna shrieked out in utter elation as she felt that first hefty surge of hot, fertile seed flooding the inside of her womb, and the sensation was Earth-shattering enough to leave her quivering against the sturdy stall walls. And as Bob fulfilled Luna’s request, with spurt after spurt of his potent load filling up the Princess with every drop he could provide, the climax that struck the Alicorn left her feeling as defenseless as when Tirek tried to claim her magic for himself.

The impregnation only lasted for a moment or so, but the spine-tingling bouts of electrifying pleasure left Luna moaning for several minutes around that swollen knot. Her hooves couldn’t stop twitching, and her marehood clung to that gryphon cock for as long as she could while she breathed heavily in her post-coital state. Due to the tight seal that Bob’s knot made, the entirety of his fertile load was nestled neep inside of Luna’s body to claim that womb, and give her exactly what she asked for. Even if the Princess couldn’t feel it just yet, the gryphon on the other side of the wall smirked at knowing she would be fruitful soon enough.

Meanwhile outside the restroom, the two Guards stood patiently outside the sound-proofing magic wall, and ensured that no ponies would try to venture too close to the doors. Fortunately, by the time Luna’s magic finally dissipated, the two were grateful that no needy ponies had to be escorted to a different restroom during that time. The session itself lasted around twenty minutes at most, but the Princess itself looked like she had been in the restroom for hours when she finally came out. Her legs were still wobbling as she walked semi-regally through the doorway, and her mane was greatly disheveled while she sported a weakly maintained smirk on her muzzle. Neither of the Guards said anything in regards to the Princess’ appearance, but they shot each other some discrete nods with knowing grins before walking as her escorts.

“Mnnnnghhhh… I think I need to lie down for a while~” Luna’s voice was just as frail as her fidgeting legs, and her tail was nestled tightly between them to ensure no ponies could see her severely stretched-out marehood. But despite how intense the session may have been, Luna made sure to glance over at her Guards to say, “And Privates? Be sure to remind me to provide both of you some extra vacation days for that recommendation~”

Neither of the armored Guards were dumb enough to hoof-bump each other, but their cocky grins remained fairly wide in giddiness as they walked the fruitful Princess up to her private quarters.