Author's Note

Welcome back to the story! I'll be working on this continuously until I finish off the Fall of the Ponyville Post Office story arc, which should be another two or three chapters. For those of you who need trigger warnings, this chapter contains the usual curse corruptive effects, F/F including a first time lesbian encounter, gay innuendoes galore, various attribute expansion, belly boobs and imminent paizuri as well as the promise of stallion-on-stallion action to come.

Thanks go to prereaders Silentwoodfire and AJ_Aficionado for getting to the chapter quickly. Enjoy!

Postal Passions: 8 - Pony Sexpress

Priority Parcel, Express Shipment and Courier Six were still reeling from what the two unicorns of the group had instantly recognized as a climactic release of massively powerful mating magic. One immense enough to destroy the lights and shatter their own innate magical defenses, sending a sharp wave of sexual feedback down their horns and directly into their heads and bodies.

The blinding flash of light in front of them that Express Shipment dimly recognized as a teleport—a feat that shouldn’t even have been possible given the Post Office’s anti-intrusion enchantments and suppression fields that prevented unicorn intruders from winking in—shortly resolved into three large and menacing shadowy forms, just visible against the nearly continuous lightning flashes out the window.

“So, I see you all are goofing off again…” Certified Mail’s ominous and unusually deep voice broke the darkened silence except for what sounded like the rippling of fabric and the licking of lips as one of the figures flared what looked to Courier Six to be a massive pair of bat wings, reaching from nearly one side of the room to the other! “But you know, maybe I’ve been working you too hard lately. It is Nightmare Night, after all! So I’ll be a kind boss for once—and throw you all an office party!”

With those words, he ignited his horn and began emitting an enormously powerful mating aura, causing their fur and flesh to burn with intense sensual fire.

“C-M! What are you...?” Courier Six found her voice first even as she found her excitement surging further along with her two coworkers, only to trail off as the mating magic flowed back down her horn directly into her forehead. It then spread out through the rest of her, quickly filling her to the brim with it, leaving her aware of little else except her own raging instincts to rut her equally turned on coworkers.

They all initially recoiled from the mating magic as if it was intense heat—one that imparted passion and pleasure instead of pain—only to find there was no escape from it; every surface of the room became so quickly and heavily infused with their manager’s mating magic that they began to reradiate it with a soft but slowly growing violet glow, offering no respite anywhere and causing every touch with every surface to result in an intense tingling sensation.

“I… this…” Express Shipment just barely managed through suddenly dry lips as her marehood quickly moistened and the nub at its base engorged, becoming quite prominent as she could see the same happening to Courier Six in front of her, whose tail involuntarily flagged and marehood began frantically winking. Either by accident or design, it was pointed right at her and barely a leg’s length away; a scent of desert sagebrush quickly saturated her nose and turned her head towards it.

“Just relax…” Certified Male told them with a smirk that was just visible in the low light as he intensified his mating aura further, to the immense satisfaction of the altered mare and griffon eagless, flanking him, who were holding toe claws and rubbing their bat wings together lightly at the sight. “And don’t worry, I’m not going to touch any of you. Night Owl and Package Handler here might, but I won’t. At least, not until you transform!”

“Trans… form?” a dazed Express Shipment managed as she found her hooves soaking up the magic from the tiled floor like a sponge and finding her forehoof drawn to her own marehood like a magnet, snaking down between her legs.

“What do you—Ah!” Courier Six likewise cried out as she made first contact with her femininity; the magic stored in her forehoof flowing just as quickly into the sensitive surface with an overpowering sensual pleasure that made her legs buckle and finally collapse to the floor, pushing her lower belly into contact with the strangely warm and magically charged surface, obeying the instinct to soak up as much of the strange energy as she could.

“What’s… happening?” Express Shipment asked in a shaky voice as she, too, began clopping helplessly alongside her nearby coworker, instinctively rolling over on her back to give easier access. Her teats quickly hardened with a deliciously sharp tingling sensation as the flesh around them began to swell on her belly before her eyes, seemingly fed by several streams of visible magical energy coming off the glowing floor around her!

“Don’t fight it, girls,” Package Handler advised with what sounded like a lick of her lips accompanied by an odd clicking sound. “You can’t, and why would you want to? So just accept it. Enjoy it! Even you, Priority Parcel! Just sit tight and we’ll tuck you later—after all your innuendos and endless bragging about your exploits, I’m pretty sure everypony here will want a piece of your tail!

“Tuck me…?” an unsteady and barely mobile Priority Parcel asked as, despite his half-hearted and increasingly feeble efforts to block it, visible concentrations of mating magic began collecting at points near him like table corners and even the former firegem socket of a shattered desk lamp, visible as an enhanced purple glow that felt both cool and hot to stand near. The gathered glow slowly stretched out in a series of thin tendrils from their sources to his body favoring the more sensitive and magically conductive surfaces, including his horn and intimate areas. They infused both steadily, charging him with more and more magic.

“Tuck you, lover-colt!” Owlia’s voice confirmed as she exchanged a quick kiss with Certified Male, the latter sparing a tendril of aura to tease her marehood, eliciting an odd non-griffon hiss of pleasure. “But since you never bothered me, I’ll leave that to the others, then!” she said with what he had a dim sense was a nod towards Express Shipment and Courier Six, whose attentions were slowly but surely turning to each other.

“But I’m not…” He was unable to finish the sentence as a series of lurid images flashed through his fevered thoughts, each more heady than last and each involving him being dominated, claimed and filled by multiple stallion shafts, starting with that of Certified Mail himself! And worse, his arousal only accelerated with every fresh same-sex fantasy; his apples felt increasingly large and seed-laden as they soaked up the alien energy like a sponge, while his organ throbbed hard as its size and already-exquisitely keen sensitivity grew further, soaking up the corruptive sexual magic from his surroundings.

“Well, look at that, Night Owl! I think he likes the idea!” Package Handler noted in some glee, reaching beneath her belly to stroke her new organ in the relative darkness with some wet sliding sounds from her still-soaked wings.

“Oh! So you mean that after all his bragging about the mares he’s bedded, he’s actually a tiercel tucker?” Night Owl teased as well, causing a shiver to pass through the sorely aroused stallion as the gryphon version of colt-cuddler registered. “It explains a lot!”

“Never fails. It’s always the colts who boast the most about their mares!” Certified Male said in some contempt as he kept his mating aura at maximum, giving his often-annoying subordinate no respite, deliberately addicting him to it—and to him!—even though he had no intention of indulging him in his current form. “So we’re seeing your true colors now, Priority Parcel!

“Guess I’ll have to report on your performance appraisal to the Postmare General that you’re not reliable in work or in rutting!” He grinned toothfully, his thestral fangs glowing brightly against the darker backdrop of the room. His horn’s enhanced mating aura cast what appeared to the unconverted to be a blacklight over everything, causing the more magically conductive surfaces in the room to also fluoresce, including the hooves and intimate areas of the unconverted ponies present; horns and erogenous zones soon glowing brightly with reflected and reradiated sexual light.

“Stop… it…” Priority Parcel tried to crawl away from the teasing words; the inescapable stimulation and unnaturally arousing emissions only for fresh concentrations of mating aura to form near him wherever he went and reach out for him anew. The irresistible sexual energy flowed freely into his flesh and soon even directly into his body through his muzzle and anal orifices, causing his same-sex fantasies to flare anew as the both ends of him became deliciously sensitive—and worse, very receptive to rutting!

“Stop it!” he begged his manager again, sitting back and clutching his head while trying to both tug his uniform shirt down over his rapt and rock-hard shaft while also erecting a shield around him, only to fail at both as his horn could only throw off a few sensual sparks. “I don’t… I’m not a…” Thwarted, he tugged desperately at his shirt tail with a hoof, trying to hide the evidence of his excitement.

“Yes, he is!”Courier Six spoke up as she crawled over to Express Shipment and began making out with her as they both worked their marehoods frantically. “But he’s so insecure about it he tried to seduce us both before you came here! Even me, an avowed filly-fooler!” she said in some disgust that was quickly overshadowed by her actions as she grasped hooves with her earth pony coworker, who was bent over in a fetal position on the floor, moaning as she dug her hoof hard between her thighs.

“Or m-me, a married mare!” Express Shipment noted unsteadily as Courier Six began expertly stimulating her with her aura, climbing on top of her and laying belly to belly with her as she pressed her swollen, nearly-melon sized mammaries capped with rigid two-inch long teats into those of her earth pony friend.

They then began grinding them together to mutual enjoyment and soon outright ecstasy; the latter’s nectar drooling downwards from her wet and winking marehood onto—and into!—the equally hot and humid opening of her coworker as twin aura constructs shortly thrust into them both in an alternating pistoning manner; one that suggested to a dazed Express Shipment that her frontier friend had done such things with mares before! “B-but he didn’t care! Even g-gave me—uh!—lip when I told him to—ah!—get back to work!” she added in a halting manner, trying to focus around her intense and growing rapture, having never felt anything so strong or sensual before!

“I see… is that all?” Certified Male asked in a gruff voice, even as he focused his mating aura fully on them for a few seconds, driving their arousal yet higher while making their efforts to relieve it even more frantic. The pair instinctively and automatically turned their marehoods towards the source of the sensual flames consuming them, trying to drink up even more of it.

“N-no! He even C-called me a boss mare under his breath and then he mmPPPH!” Her voice was silenced as Courier Six’s darting and tasty tongue invaded her muzzle, performing a very practiced dance with her own, leaving her wondering why she’d ever stayed with her stallion if all she ever wanted or needed was now lying on top of her!.

“Traitor!” Priority Parcel accused even as he found himself backed into a corner of the sorting room, loudly tripping over a trash can and then finding himself flat on his flank with his apples already the size of oranges and growing even larger as they came into contact with the glowing crystal veins in the granite floor tile, which immediately began feeding him more corruptive mating magic. His body all but inhaled it through his anal orifice, immersing his insides in it and leaving it difficult from him to move as he suddenly felt hot and very heavy.

He tried to think of something else—tried even to focus on the incredibly unlikely and lurid scene of mating mares in front of him only to find he couldn’t enjoy it. Not when all he could think of at that moment were stallions in general and his manager in particular, improbably wanting not a mare to mount, but to take the role of a mare himself!

“Please, C-M! Turn the tuck light off!” he begged his manager in a quavering voice as the head of his slowly lengthening organ began to produce a rapidly growing wet spot against his uniform shirt where it held it captive against his upper belly, well above his navel.

His plea only resulted in a series of snickers and sensual slurmps as they recognized his state. “So now you know what it’s like, Double-P!” an unsympathetic Courier Six called out.

“So… insubordination and sexual harassment of your superiors?” Certified Male noted with a growl as he advanced fractionally on his stumbling subordinate, who was badly flushed and now fighting a losing battle to hide his enormous and obvious erection within the bottom of his uniform shirt, which didn’t quite cover it as he struggled to hold it down over it with what few shreds of control he had left over his own aura.

“N-not my fault… c-couldn’t help it…” he protested shakily, not denying it. “Had t-to… rut…”

“I don’t want your excuses! I warned you before to keep it in your sheath, but you wouldn’t listen! And I won’t stand for it, Priority Parcel! You’ll have to be disciplined!” Certified male announced with a barely mock glower, though there was an evil gleam in his newly glowing cat eyes as he zapped his subordinate’s uniform, enchanting it to start unraveling itself from the bottom up, progressively baring more of the erect organ he’d been trying so hard to hide.

“Wha—no!” Priority Parcel shouted but couldn’t come up with a counter-spell or enough magic to power it as first his medial ridge became visible and shortly the entire shaft bounced free. It produced a sudden spray of clear but sticky fluid from the tip as pressure was relieved on the partially flared head, which he then tried to cover with his hooves. But the freed threads then respun themselves into ropes and wrapped around his limbs before stretching out to anchor themselves to nearby furniture, pulling his fore and hind legs apart to display him fully.

“Not bad…” Postage Due’s voice admitted. “That’s a pretty good size for being unaltered. Guess he wasn’t completely full of himself.”

“Still nothing compared to us, though!” Owlia’s voice rejoined, causing his eyes to dart between their respective silhouettes, not understanding why they appeared to be shadows except for their eyes while everything else was lit up to varying degrees by the blacklight-like mating aura. “So what are we gonna do with him? Discipline him?” her teeth suddenly glowed bright white; some even appeared to be pointed!

“Oh, I could think of a few ways to do that!” Owlia suggested mildly. “But since his affront was to them, I think they should be the ones to tuck him!” She nodded back towards Express Shipment and Courier Six, who were now rolling back and forth over each other in their passion, the latter losing her Stetson hat in the process, revealing a long flowing mane except for a small bare area in front of her left ear with a rather ugly scar.

They only stopped when Courier Six ended up on her back and Express Shipment began going down on her brightly glowing horn, which she began kissing and nibbling at. “W-wait—th-this isn’t cheating, is it…?” The latter suddenly wondered between licks even as she continued to grind her large and laden belly breasts into her friend’s, wondering why they hadn’t done this before.

“Not in my book—ah!” Courier Six assured her somewhat frantically and breathlessly as she trembled visibly and then cried out under the direct stimulation of her horn, her eyes squeezed tightly shut as her marehood emitted a quick squirt of sagebrush-scented fluid onto the floor in front of her, causing even more mating magic to collect around it. “L-like I learned in the Moojave Express, you take what opportunities for rest and relaxation you get, whether with the local donkey judys or trading gems for fun with diamond dog dams! Or put another way—any port in a storm!” she said as a loud clap of thunder sounded outside for emphasis.

“Aw… look at that. They really do make a cute couple,” Night Owl admitted as she briefly groomed her new bat-wings, cleaning each membrane surface between her new wingfingers in turn.

“If you say so,” Certified Male shrugged. “As long as they’re mares, I’m just not interested.”

“Well, I can fix that!” Night Owl said as she stepped forward towards them. “How about it, fillies? Want some eagless action? Or maybe a tiercel tuck instead?” she asked as she flared her wings hard, causing confusion in a frozen and fearful Priority Parcel as he again saw what did not look like feathered wings, but increasingly looked like something out of a vampony horror novel he’d once read where even gryphons were converted to blood-sucking undead beasts.

“Huh?” Express Shipment stared at her in some daze over Courier Six’s horn, as Courier Six herself opened her glazed eyes and focused through the darkness with some difficulty. “Eagless… sure… but tiercel?” She blinked.

“Ah, right. Guess you can’t see me yet. Then if you wouldn’t mind, C-M?” she requested with a deferential baring of her throat to him.

“My pleasure.” He released a glowing ball that floated to the top of the ceiling and then burned bright, illuminating her like a spotlight, leading to gasps of excitement and fear as they beheld her new features.

“Owlia!” an agape Express Shipment began.

“You’re a… bat-gryphon?” Courier Six didn’t know what else to call her but was surprised to feel a fresh surge of blood into her intimate areas as she imagined making love to such a exotic and incredible female specimen.

“It’s Night Owl now… but sure am! And that’s not all!” She then reared up to her full height to show off a massive griffon lionhood bracketed by four equally oversized teats. “So how about it, fillies! Want to share me? Take a drink or a tuck from this, and it’ll give you a beak and wings! To say nothing of a set of male equipment that’ll put anything Priority Parcel said he has to shame!”

“Wow… really?” Express Shipment wasn’t sure why she believed it, let alone why she was so turned on by it, but she did and she was!

“You know, I could deliver a lot faster with wings…” Courier Six admitted as for the first time she found herself with eyes for male attributes, tracing the exotic and oversized griffon organ’s impressive dimensions and noting the bulblike bulge near its base. “I’d never have to worry about navigating canyon cliffs or belligerent buffalo tribes ever again! You can really… change us?” she barely dared hope.

“Yep! Just like Package Handler here…” She nodded over to the side, inviting the former Postage Due to step forward, which she did quite happily, revealing her Hippogriff features.

“Holy…” Priority Parcel felt on the verge of fainting as he beheld her new form, sporting both male and female equipment as well as a sharp beak, tufted ears and bat wings, the throbbing of his own untouched and unmolested shaft only getting worse as he imagined them taking him from in front and behind; the thought causing both his muzzle and nearly-fully flared head to drool.

His reaction did not go unnoticed. “Oh, like you deserve her or Night Owl, Priority Parcel!” Certified Male sneered as he stepped into the light himself, showing off his darker coat and longer horn as well as his own enormous organ, easily the largest of the three. “But don’t worry—we’ll get to you eventually, but we’ll let you ripen a little more first! In the meantime, enjoy the show! I know I will, my darling Night Owl…” He gave her another tease with his aura.

“Mmmm…” she drank up the magical contact for a moment with closed eyes before opening them again and turning her gaze back on the two unaltered mares before her. “So how ‘bout it, fillies? Want me? Want this?” she offered up her new eaglehood again, to which the two mail workers looked at it, and then at each other.

And then they shifted fractionally off each other, inviting their longtime griffon colleague to place it between their bellies where it could be pillowed completely by their large and laden mammaries.