Coupons

by dirty little secret

Rating: mature
Tags: Porn, Princess Cadance, Fetish, Non-consensual, Shining Armor, Sex, Twilight Sparkle, My Little Pony: Friendship is Magic
Length: 9630

Cadance and Shining Armor have been having a bit of kinky fun by trading enchanted sex coupons with each other. This backfires, though, when Twilight finds their stash...

Cadance and Shining Armor have been having a bit of kinky fun by trading enchanted sex coupons with each other that must be honored as soon as they're presented ... or else. It certainly makes those long nights while babysitting Twilight more interesting. It backfires, though, when Twilight finds their stash...

Contains: foalcon, incest, dubious consent, facial, creampie, cum-swapping (including male cum-swapping).
Cover art adapted from 1879331 by artiks.

Published 2023-09-18 01:00:01 UTC
Last updated 2023-09-19 04:52:42 UTC

Prologue

Even though the words were beginning to blur on the page, Shining Armor stuck to his book, reading the tedious paragraphs full of crucial names and dates over and over again. He propped his head up on his hooves, staring at the impenetrable doldrum of The Royal Canterlot Guardspony’s Guide to Equestrian History. He was expected to somehow remember everything in this entire book if he was going to ace the final training exam to become a fully fledged Royal Guard. And not just pass it. If he wanted any chance at the higher ranks, he’d better get almost every question right. Hence, studying it even though the minutia of thousands of years of history was boring him to tears and he could barely force himself to read another line.

Just then, though, a very welcome distraction slipped into his bedroom.

“Cadance!” Shining leapt up from his desk and rushed to her, clinging to her neck as if to save himself from drowning as he nuzzled into her mane – that ponytail of hers was irresistibly cute!

She laughed a little. “Nice to see you again, too. I see you missed me for the thirty minutes I was gone.” And when he didn’t let go, she laughed a little more. “Are the books that bad?”

He still clung to her, enjoying her warmth and the soft silkiness of her pink fur. So much better than those books. “You have no idea...”

“Oh, I think I might have some idea. After all, I studied quite a bit under Princess Celestia, and she’s not shy about assigned reading, either.” Cadance looked at the thick tome on Shining’s desk and scrunched her nose. “At least she usually had better taste in reading material, though.”

Finally, Shining let go of his secret girlfriend, standing on his own four hooves again, rather than hanging off of her neck and shoulders ... but he still nuzzled the back of her mane. So nice... How did she always manage to smell so good, even after a long evening of babysitting?

“Finally got Twilight tucked in for the night,” Cadance said casually, conversationally ... but with a little wink.

But Shining knew it meant so much more... For one thing, it meant that his sister wasn’t really asleep. She never went to sleep at bedtime. She’d be under the covers, reading some book of magic by the light of her own horn. But that in turn meant that Twilight wouldn’t be bothering them. With a normal filly, there would always be the chance of her getting out of bed for something. Not with her – she’d be too worried about her nocturnal reading habits being discovered, so she’d be sure to stay right where she was. Which meant he and Cadance would be effectively alone, undisturbed for the next couple of hours until his parents came home. And that meant...

But he had responsibilities now. As much as he wanted to throw those responsibilities to the wind, he could never be that kind of pony. He always did things by the book. That’s why his training commander liked him so much. “I, uh, really need to study for this, though. It’s important. And the test is tomorrow!”

Cadance backed up a pace, looking him piercingly in the eyes. Wow, those eyes of hers. He could just drown in those depths if he let himself. And she knew it. “Come on, Shiney,” she said, her tone teasing as if she already knew how this was going to go. “I know you want to. And who knows when will be the next time both your parents will be out of town? How long will it be before I’m here babysitting again?”

“I know, I know. And believe me, I want it so much!” Shining shook his head. “But I just can’t let anything distract me right now. I’ve been falling behind on learning this stuff as it is, and—”

A flash of magic. Three slips of paper appeared in midair, hovering in front of him within Cadance’s magical aura.

One free back rub and massage♥
One free anal pounding♥
One free THOROUGH tongue-bath in the shower♥

He looked back into her eyes, his jaw dropping. “Wow, three coupons... Big spender tonight, huh?” He could already feel the slight tingling pressure along his spine, the slight tightening of his chest, the restlessness in his legs. The magical compulsion of the hex baked into these coupons was already affecting him.

“You’re going to do it, aren’t you?”

He shook his head. “Why did I ever let you enchant those sex coupons with Starswirl’s Unbreakable Hex?”

“Because that’s the only way you could get me to give you a blowjob under the school bleachers even though you were still all sweaty from hoofball practice.”

“Oh, right...” Come to think of it, though, that had totally been worth it...

Cadance came alongside him, reaching one hoof under his belly to gently stroke his cock as it began to emerge from his sheath. “Now you’d better get started on that back rub if you want to finish all three before your parents get home. Wouldn’t it be so awkward if they caught you in the shower with the babysitter?”

“I was just being responsible and conserving water!” Taking advantage of her closeness, he nuzzled that spot just above the base of her tail, the little spot he knew drove her crazy ... and always made her tail shoot up high.

Giggling, Cadance moved past him, giving him a gorgeous view under her rising tail as she threw herself onto his bed. “Always so practical and responsible. I love that about you.” She glanced back at him, her eyes half-lidded and partly veiled behind her mane, which was already beginning to come loose from the ponytail after he’d been nuzzling it so much. “Now come over here and rub my back like your dignity depends on it.”

He chuffed out a little laugh. “It does. Why did I ever let you set ‘confess your most embarrassing secret to Celestia in an official royal audience’ as the punishment for breaking the hex?”

She looked away again, but swished her tail playfully behind her. “Because that’s the only way you could get me to invite those nice fillies from the cheerleading squad over and—”

He pounced on her before she could finish, and she squealed in glee.

Author's Note

This story was chosen by my SubscribeStar supporters! Every month, I take suggestions from my supporters and they vote to decide which story idea I'll write next.

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Chapter 2

As quietly as he could, Shining slipped into Cadance’s suite in Canterlot Castle. Even though the guards outside were trustworthy, he didn’t know who else might be paying attention, so he was careful to shut the door slowly and hold the latch so he could slowly and quietly click that back into place as well. He knew he had to do this, but if he was caught in here, his whole career could be jeopardized.

“Shining?” Cadance said, as she came trotting into her suite’s entryway. Despite how quiet he’d been, she must have somehow heard him coming.

He shrugged sheepishly and nodded.

Her look of surprise quickly faded into a more knowing, coy gaze. “Hmm... I didn’t think they allowed junior guard cadets into the royal housing wing of the palace, much less a princess’s personal chambers.” She came a little closer. “Who knows what might happen if such an inexperienced recruit were to infiltrate all the way into the royal bed itself...”

“Well, um...” Shining coughed a little as his nervous throat closed up. “Well, a certain door guard of yours might be friends with a certain favorite uncle of mine, so...”

“Oh?” Cadance was close enough to touch him now, though she didn’t yet. “Well then, I’ll just have to see about disciplining him...” She lifted a hoof and caressed down the line of his mane to his shoulder. “Right after I get done disciplining you.”

Her hoof was tracing farther along his back. Despite himself, he was starting to slip out of his sheath, just from the familiar, yet always-tantalizing smell of her perfume. He couldn’t let himself get distracted by what she obviously thought he’d come here for, or else he’d forget what he actually came her for. Which was ... was...? What was it, again? Oh! She was running her hoof right down his flank now, angling her body toward him and inviting him to do the same! Maybe just a little bit of—

“Hmm... Is there anything else I should punish you for, Cadet?”

Despite his cock fully hanging out of his sheath now and trying to do all his thinking for him, Cadance’s question actually refreshed his memory. Unfortunately. “Um, actually, there is something I really need to talk to you about.”

“Oh.” Deflating a little when she heard the serious note in his voice, she drew her hoof away. “Is something wrong? I thought you’d snuck in here to, you know...”

“No, no. Believe me, I am totally into it!” He turned and kissed her cheek, hoping she wouldn’t take this as a rejection or anything. “But there’s, uh... There’s a thing about my sister.”

Cadance giggled. “Uh-oh! What kind of trouble has little Twilight gotten herself into now?”

“Well, um... I guess she’s gotten herself into the me kind of trouble. It’s about the coupons we—”

A flash lit the room. When Shining blinked his eyes clear, he found Twilight herself standing right in front of him, looking up at him with an adorable – and terrifying – smile.

He suddenly darted away from Cadance, trying not to look like he’d just been kissing her. Cadance deftly stepped in front of him, hiding his burgeoning erection from his filly sister’s view. Cadance didn’t yet know, of course, about how Twilight had already gotten far more than a good look at it.

“Sunshine! Sunshine! Ladybugs awake! Clop your hooves and do a little shake!”

Hearing both of them do that silly little rhyme they always did when they met injected some much-needed feeling of normalcy into it for Shining ... though he was afraid it would soon be horribly shattered. How could he tell Cadance what had happened? How could he not tell Cadance what had happened? And how the heck could he possibly do either with Twilight right there with them?

As their rhyme ended, Twilight laughed happily. And Cadance patted her on the head. “You’ve been working on your teleportation, haven’t you?”

“Uh-huh! And look, I can teleport other things, too!”

Three smaller flashes followed. Three slips of paper appeared in midair in front of Twilight. Quickly, she grabbed them in her magic and held them up toward Cadance and him.

One free cream pie♥

One free mouthful of pussy♥

Drink my cum out of another mare’s pussy♥

Cadance’s eyes went wide. Her jaw dropped. “T-Twilight! Where did you get these?”

“Under Shiney’s bed!” Twilight beamed with pride.

Snapping her head around, Cadance gave Shining a sharp look. He returned an apologetic shrug.

“These coupons are so amazing!” Twilight continued. “Shiney taught me what a blowjob is!”

Another, even sharper, look came blazing from Cadance. Shining held his hooves up, begging for mercy. “I couldn’t help it – the hex!”

“And now I want to learn a bunch more!” Twilight grinned and bounced happily. “What’s a cream pie? It’s not an actual pie is it? Maybe I should have brought a different one...”

Ignoring her for a moment, Cadance turned fully toward Shining. “You knew your sister had found these, and yet you still left them under your bed?”

“No!” he said vehemently. “I had no idea she’d found them! And when I went to check, they were all gone!”

“All of them? No no no no. This can’t be happening! Why didn’t you search her room and get them back?”

Crap! He really should have thought about doing that! But where would he even start? “But she has literally tons of books in her room. The coupons could be hidden in any of them!”

Twilight laughed and blew a raspberry. “Silly BBBFF! I’m not gonna hide them in my room – that’s way too easy!”

Shining’s hooves shook. No... If not in her room, where? The library? The Canterlot archives? Celestia’s magic school? Or was Twilight creative enough to hide them somewhere else entirely? Oh no! What if somepony else found her hiding place? This could really be getting out of control!

Cadance, as usual, was handling things a lot more calmly though. “That’s so smart!” she said sweetly, patting Twilight on the head again. “What amazing hiding place did you come up with?”

“Nuh-uh!” Twilight shook her head. “Not that easy! They’re mine now!”

Only someone who’d been around her as much as Shining had would have noticed the slight wince on Cadance’s face, quickly hidden behind a comforting smile. “I see... But you know you’re not supposed to take things that don’t belong to you, right? You’ve got to give them back.”

“I will! Look, here’s three now!”

Shining could already feel the first tinglings of magical compulsion radiating from the hex enchanted into those three coupons. The longer they resisted fulfilling them, the stronger the compulsion would become ... the compulsion to march into an audience with Princess Celestia and publicly announce their dirtiest, most embarrassing secrets... He knew Cadance must have been feeling it too.

He gasped as the realization struck him. “Wait! If she gave us the whole coupon booklet at one time, would the hex count that as ‘presenting’ it to us?”

Cadance went pale, staggered backward a little. “There are ... there are things in there that I definitely can’t do with a little filly! And certainly not all at the same time!”

Shining nodded. “We can’t let her give it to us – we have to find it ourselves!”

“I’ll start working on a detection spell,” Cadance whispered back to him. “If I can detect a trace of the hex’s magical signature, that should lead us right to it...” She looked back toward Twilight. And the coupons. “Until then...”

“We ... we don’t have any choice, do we?” Shining hung his head lower ... and yet his cock stiffened more. Such an odd mix, to be feeling both lustful anticipation and nervous dread at the same time...

“I’m supposed to be a princess!” Cadance whispered. “I cannot, under any circumstances go confessing my darkest secrets in a public royal audience! It wouldn’t only be me who gets ruined – it would reflect badly on Princess Celestia, too!”

“Well I can’t do it either! My guard career would be toast! I’d never be able to show my face in Canterlot again!”

Twilight just watched the two of them expectantly, happily content, her tail swinging and swishing behind her.

Shining winced. “So, are we ... are we actually going to do this?”

“Do we really have a choice?” With a heavy sigh, Cadance stepped to the side, no longer blocking Twilight’s view of Shining Armor.

The view of his cock hanging down below his belly certainly didn’t deter the filly in the slightest – she leapt toward him. Thanks to her small size, she was easily able to slip in beneath his belly, where she started to lovingly lick up and down his length, rubbing her face all over it.

“Shining!” Cadance gasped. “She’s your sister! Why are you getting hard?”

He held his hooves up helplessly, which only gave Twilight even better access. “You said it yourself, we have no choice! I ... I couldn’t help it! She gave me that ‘one free blowjob’ coupon last night. And, well, she’s kind of pretty good at it, for a filly.”

Cadance raised one eyebrow. “Seriously, Shining?”

Beneath his belly, Twilight took his cock into her mouth, quickly swallowing it down until she’d managed to push her lips almost halfway down his length.

“Oh...” Cadance’s eyes widened. “She is pretty good.” Then she looked back up at Shining with a smirk. “For a filly. But let’s show her how a real master does it, hmm?”

Quickly, Cadance led him over to sit on the edge of the bed; it wasn’t easy, since Twilight would barely allow him to take his cock out of her mouth even for a moment. Once he sat there, he could barely believe his eyes as he watched both his girlfriend and his sister sharing his cock.

Twilight was greedy for him, which left Cadance with mostly just his sheath and balls to play with. Not that it slowed her down – she often liked to start that way, with gentle teasing licks and burying her muzzle deeply in his crotch. And as Cadance teased, Twilight sucked earnestly and diligently on his tip, scarcely even coming up for air.

Still not quite believing his luck, he reached down with both hooves, running one hoof lovingly through each mane. He knew better than to try and push them or take control. He just wanted some way to return a little bit of love and demonstrate just how much he was enjoying this.

Because, yeah. There was no denying it. Despite being only a filly, despite being his sister, he was really enjoying the feeling of Twilight’s second blowjob ... and the increasingly lascivious help Cadance’s tongue was adding to it just brought it way over the top. Definitely one of the best blowjobs he’d ever gotten! And that was saying something, because Cadance really knew what she was doing with that, and it wasn’t even the first time she’d had another mare to help her with it.

But, of course, it took a turn toward being even better when Cadance finally managed to edge Twilight up and out of the way. Cadance took his cock into her mouth in a very well-practiced motion, effortlessly swallowing it down into her throat and sinking her lips all the way down to his sheath.

Twilight pouted when she had nothing but his balls left to lick ... but Shining didn’t take much notice. He was busy trembling and shuddering as he once again felt the familiar heaven of his girlfriend’s throat expertly pulsing and squeezing around his length.

With a wet slurp, Cadance pulled all the way back until his tip popped free. Ignoring the pre-cum dribbling out over her lips, she looked down at Twilight with pride. “There. That’s how it’s done.”

But the itch in his hooves was getting worse. This wasn’t helping! “The coupons!” Shining said. “Cadie, we have to... Come on! We’d better get started before we find ourselves zombie-walking toward the throne room!”

Cadance nodded, causing his cock to bob against her face. “Right... So what do we need? A cream pie, a mouthful of pussy, drink my cum from another mare’s pussy... Hmm. Well, we can get both of those first two done at the same time!”

Shining’s eyes went wide. “You’re sure?”

“Well we don’t have much time, do we? Twilight, get up on the edge of the bed, dear.”

“Yay!” Twilight hopped up instantly. “This is so neat!”

“Yeah, well, don’t get used to it...” Shining slid off the side of the bed and came up behind his sister. Wow ... he really shouldn’t be doing this kind of thing, especially not with a filly especially not with her. But what choice did he have? And, well ... did he really not want to?

He looked down under her already-raised tail. Wow. Yeah, there she was. His filly sister. Right there for anypony to see. Specifically, for him to see. Of course he’d always known that his little sister had an adorable round little butt. That she had a cute and pert little vulva nested between those purple cheeks. Since she rarely wore clothes and rarely kept her tail tucked, that was all just a fact of life for a young stallion growing up with a little sister always around. But now, to see it winking up at him, flashing her pink inner need at him as it dripped her filly juices off the side of the bed...

“Enjoying the view?”

He snapped out of it at the sound of Cadance’s voice. “No! I mean, uh...”

She laughed a little and flopped onto the bed in front of Twilight. “Don’t worry, Shiney. Since we’re stuck doing this, you might as well enjoy it. I certainly intend to.” Looking back down to Twilight, she took hold of the filly’s horn with her hoof, drawing Twilight’s face down between her legs. “Wanted a mouthful of pussy, did you? You naughty little filly. Well here you go!”

Twilight squealed a little in surprise as Cadance forced Twilight’s head down, mashing her mouth against Cadance’s pussy. But that surprise quickly turned into an obsessive moan as Twilight started licking.

Shining’s cock throbbed at the sight of his sister eating out his girlfriend. If not for the look Cadance was giving him, he might have stood there dumbstruck and forgotten what to do. But that look in Cadance’s eyes! It was like she couldn’t wait to see him do it. Would seeing him mount his sister be as hot to her as watching the two of them was to him?

Screw it! Time to find out! He hefted himself up onto the bed, planting his forehooves on it to either side of Twilight’s small body. Standing on the edge of the bed, she was just the right height for him...

“Remember, Shiny, she’s very small. So be gentle.”

He nodded. “I know, I know.” But, honestly, it was a good reminder. His hips were practically thrusting forward all on their own, in an instinctual need to penetrate, to breed. His body didn’t care how young she was, didn’t care that she was his sister. It only sensed a tight, virginal hole to be filled, and it was desperate to complete the task.

The tip of his cock pressed up against something warm and gooey-wet. There wasn’t anything else it could possibly be.

“Are you, uh...” Shining took a deep breath. “Are you ready, Twiley?”

“Muh-hmuh!” Her response was muffled by Cadance’s pussy lips, but still clear and unambiguous.

Well ... here it goes. Steeling himself as if it would be painful, Shining forced himself to do what was necessary: to slowly push forward. Into his little sister. There wasn’t as much resistance as he was expecting. Twilight was tight, yes, moreso than any mare he’d ever been with, but very wet and seemingly eager to stretch around his girth. As he pressed carefully inward, his cock slid into her with ease and grace.

Couldn’t quite say the same for Twilight, though. She moaned and squealed as her brother’s cock claimed her virginity. And despite her being muffled by Cadance’s pussy, she was loud enough that Shining worried the guards outside Cadance’s suite would hear.

“Are you okay?” Cadance said sweetly, looking down at her.

Shining, though, had his eyes clenched shut and thought the question had been for him. “Yeah. She’s...” He grunted as he pushed in a little more. “She’s just really tight.”

Cadance laughed at him a little. “You’re enjoying this, aren’t you?”

Finally, he opened his eyes. He’d thought maybe he could pretend that it wasn’t Twilight underneath him, but he hadn’t really been able to convince himself of that, especially hearing her voice as she moaned. And as he looked past Twilight’s head to Cadance’s body, he could see the tell-tale twitching of her belly, the slight motions that meant an orgasm was brewing. He huffed. “Oh, and you’re not?”

She twitched even more when Twilight found her clit. And through her stifled moan, Cadance said, “Oh just shut up and fuck your sister.”

Hearing something like that out of his girlfriend’s mouth actually had the opposite effect for a moment – he froze. “W-what?”

“Which part were you confused about? Shutting up, fucking, or your sister?”

He looked down at Twilight. Looked at where his cock disappeared inside her. A lot of it was already in, almost to his medial ring. “Uh ... I guess I was just kind of surprised is all. By, you know, the whole concept.”

Cadance giggled. “I’m just giving you a hard time, Shiney.” Looking into his eyes, she winked. “Now give your sister a hard time for me, okay? She deserves it – she’s doing a lovely job with her tongue.”

Was it just his imagination, or did Twilight’s body actually squeeze him a little on the inside when she heard that compliment?

Well, anyway, what was he waiting for? He was already inside her, after all... Moving his forehooves to take hold of his sister’s little rump, he started to push into her again, looking forward to sinking the thick bulge of his medial ring through her tight entrance.

But it was not to be. After he sank just a little bit more of himself inside, Twilight suddenly yelped in pain, yanking her face up out from between Cadance’s hind legs. “Ah! Too deep!”

“Shining,” Cadance chided, “I told you to be gentle!”

“Sorry, sorry!” He pulled back, almost all the way out of her.

Twilight turned her head to look back at him, her muzzle dripping. “It’s okay, BBBFF. It didn’t hurt that much. Please don’t take it away. I really like it!”

“Sorry,” he said again, rubbing Twilight’s back. “I just, uh, didn’t expect you to be quite so small. I’ll be careful now.”

“That’s the spirit!” Cadance reached down with one forehoof and nudged Twilight back toward the task in front of her.

Apparently, Twilight hadn’t quite gotten her fill of pussy yet, because she dove enthusiastically right back in, lapping eagerly at Cadance’s winking slit, making Cadance moan and shudder.

It made Shining twitch a bit, too. In his cock, which Twilight surely felt. He couldn’t help it – she was just so cute down there, and it was so hot to see Cadance getting eaten out. Despite his own very excusable excitement, though, he made sure to restrain himself carefully as he pressed back into his sister’s little filly pussy. The last thing he wanted was to hurt her again. Thankfully, his big brother protectiveness instinct was stronger than his lust-fueled breeding instinct ... for now.

Still though, holding back wasn’t easy, especially as he started to get comfortable with sliding in just up to – but not beyond – Twilight’s limit with each thrust, beginning to build up a rhythm. If it weren’t for the fact that almost half of his cock couldn’t fit inside her, he would have had to admit his sister’s pussy was the best he’d ever had. Though, of course, Cadance’s still won out by a hair. Even as he thrusted into his sister, he could imagine the silky-warm feeling of Cadance’s soft, welcoming pussy as she effortlessly took his entire length. It sure didn’t hurt that he could look at Cadance laid out and trembling in building orgasm the whole time he—

And oh, crud – he was already starting to flare! That tell-tale redoubling of tightness deep inside was unmistakable, as were Twilight’s steadily growing moans. “So big...” she mumbled against Cadance’s pussy. When he looked down at her, he could just about swear that he a slight bulge moving up and down the sides of her body, following the movements of his wide flare deep inside her.

Despite the tight squeezing warmth of his sister’s most intimate depths, Shining managed to hold himself back pretty admirably. He grit his teeth and tensed his legs, forcing himself to keep the same slow, steady rhythm, never allowing himself to plow into her and hold his cock deep inside her like his instincts screamed at him to do. This was his sister’s first time, after all. He had to make it count!

What did him in, though, was the familiar siren song of Cadance reaching her climax. Cadance was never much of a screamer. Instead she had this series of low moans and gasps that would build, build, build ... and then give way to complete silence as her body tensed up past the point of no return. And then finally, finally a huge breathy gasp as her body went haywire and began to pulse uncontrollably.

So many times in the past, he’d held himself back waiting for that exact moment before allowing his own release. And now, the same habit took him over. Without even thinking, he pushed hard into Twilight until he couldn’t physically fit any more of himself into her. The instinctive need to breed and shoot his load of cum as deeply as possible overrode even his brotherly protectiveness. And then it came, throb after throb, thick jets of cum surging straight from his tip into his sister’s unprepared womb.

Twilight cried out messily against Cadance’s squirting pussy, and at first Shining couldn’t tell whether that was from pain or pleasure. Even in the midst of his orgasm, it hit him that what he was doing was so very wrong and he felt a sharp pang of panic that he might be hurting her.

His worries were relieved a mere moment later when the throbbing of his cock and the spreading swell of his cum inside her triggered Twilight’s orgasm. Maybe her very first? She squeaked adorably, and her pussy clenched down with unbearable tightness, strangling his cock as her body flexed inside, sucking his cum down deeper within her.

Still, she was quite a small filly, and he’d blown quite a big load. There was only so much her body could guzzle down before she began to overflow and leak thick streams of cum between her pussy lips and his shaft.

The cream pie had been delivered. He could feel the compulsion of the hex lessening ... but it wasn’t entirely gone. There was still one more coupon left to be satisfied.

Shining looked up at Cadance, who’d fallen back against the bed, heaving in deep breaths that made her belly rise and fall from chest to teats. He tried to remember what this coupon had been for. “’Drink my cum out of another mare’s pussy’ ... how do we even do that? Does that mean you have to eat Twilight out now?”

Cadance sat up. She shook her head. “I don’t think so. Since she presented the coupon to us, then ‘another mare’ has to be one of us, so it has to be me.”

That made no sense to him. “But how? We’d have to get this mess inside you somehow, right? But Twiley can’t reach herself with her mouth to pick it up, and you can’t reach yourself with your mouth to put it there... There’s no way it could work.”

“There is one way...” She looked at him.

It took a long time for him to get it. Embarrassingly long. “Wait ... me? With my own...? No way!”

“Well, unless you think you can do another round before the compulsion takes over us...”

Shining took a step back, pulling his now-limp cock – with some difficulty – out of his sister’s pussy. A thick glob of cum splashed out of her as his still-flared tip popped free and swung down. His own cum. Could he really...?

“Come on,” Cadance urged, “quickly! Don’t be a baby about it. I’ve had my mouth full of your stuff more times than I can count. You can do it just once!”

“Fine.” He took a deep breath and tried not to think about what it was he was doing. Or who he was doing it with. He just bent his head down low under some filly’s tail – who didn’t necessarily have to be his sister – and planted his lips against her winking and thickly dripping pussy. Then he slurped up a nice big mouthful of some warm, slimy stuff – that didn’t necessarily have to be his own cum – until he was sure that it would be plenty enough to share.

The foul taste of it did make him gag a little as he pushed past Twilight in order to reach Cadance, but he steadfastly refused to spew it out. If he did, he’d have to do this all over again!

Thankfully, he didn’t have far to go. Soon, he was in a very familiar place between Cadance’s hind legs, pressing his mouth against her pussy. It suddenly hit him how much bigger she was than Twilight ... and softer, too... But that didn’t matter – the important part was holding up Cadance’s legs and pouring the cum from his mouth into her. She made it easier on him by holding her pussy lips apart with her magic, allowing him to stick his tongue inside and simply pour it all in, flowing down over his tongue.

He got it out as quickly and thoroughly as he could. He’d have a new-found sympathy for Cadance swallowing huge mouthfuls of the stuff now, but he was ready to be done with this part!

“There!” He wiped his mouth. “There you go, Twiley. Now you can do like the coupon said and drink my cum from another mare’s pussy.”

Twilight, for her part, had watched the whole process with rapt fascination. And she didn’t hesitate in the slightest when it came to diving back down to Cadance’s pussy and slurping the cum into her own mouth.

Despite the lingering taste still on his tongue, Shining had to admit he enjoyed the sight. His cock, which had mostly retreated into his sheath, twitched a little, beginning to re-emerge.

But not fast enough. Soon, Twilight had finished her meal. She came up licking her lips and then smiling wide. “Thank you, Cadance! Thank you, BBBFF! That was the best thing ever!”

The compulsion of the hex was fully lifted! Such a relief! Shining took a deep breath, feeling like he’d just now gained the freedom to do so.

Cadance seemed more relaxed as well ... but also more focused. She sat on the edge of the bed, looking down at Twilight’s dopey grin. “Alright, little filly. We need to talk.”

“Huh?” Twilight’s grin vanished in an instant. She started backing away from both of them. “Actually, um... I should go check on ... a thing ... I think I have an overdue library book or maybe a—”

“Shining! Shield her!”

Instinctively following Cadance’s order, Shining instantly cast his shield spell – his own special talent that nopony could do better – around his sister.

And not a moment too soon. Almost before his shield was up, Twilight vanished in a flash of teleportation ... only to smack against the inside of his shield a moment later and drop back down to the floor.

“Ow!” She rubbed her head where she’d smashed against his shield.

Now both he and Cadance stood up, coming right to the edge of the shield and looming over her. He held his spell diligently in place. Twilight was very good at magic and far stronger than a filly her age should be, but shields were his own special talent, and even she couldn’t break through one of his.

“Twilight,” Cadance said sternly. “We need to talk about this.”

This time, Twilight didn’t attempt to resist. She just looked away and nodded.

Cadance glanced at Shining. He didn’t know what she was planning, but he could see the question in her eyes and he trusted her judgment, especially when it came to Twilight. He nodded back at her, already in full support of whatever she’d decided.

She turned back toward Twilight. “Now... I think we can agree not to tell your parents about all of this ... as long as you tell us where the rest of the coupons are.”

Twilight was still looking away. She shrugged.

Cadance’s face went tight. She gave Shining a desperate little glance.

But it was alright. He knew how to get through to his little sister. He knew better than anypony. He stepped to Cadance’s side and laid a hoof over her shoulders. “And ... maybe Princess Celestia doesn’t need to hear about it, either.”

Twilight snapped toward him, her eyes wide. “No! You can’t!”

“Oh? I think it’s pretty important that she’d know what her most faithful student is doing with these magical artifacts she’s found...”

Twilight blanched ... and then prostrated herself on the floor. “Okay! Okay! I’ll tell you where they are! Just don’t tell the Princess about it!”

He let out a deep sigh. A sigh of relief ... and maybe slight disappointment?

Author's Note

This story is brought to you thanks in part to my SubscribeStar supporters! Their support is essential in keeping me going, and it helps justify writing stuff like this instead of more 'commercial' fiction.

If you'd like to help keep me writing, and even decide which stories I write next, please check out my SubscribeStar page.

Chapter 1

Flopping into his comfortable, familiar bed at home felt so good. Shining Armor felt like he’d really been through the wringer today. The test had been grueling. The anxiety over his score had literally taken his breath away as he waited to hear the results. Then there was the thrill of finding out he’d made it – almost a perfect score! And, of course, trying to make it through the rest of the day of training while having all of that on his mind.

But his day wasn’t over then, either. His parents had taken him out to a fancy Canterlot dinner, which was great and everything, of course, but it came with its own stresses. It still took energy to get through. And over the course of the dinner, Twilight Velvet had put away just a bit too much wine ... and when they’d gotten home, Night Light had made it far, far too clear that he was ‘taking her to bed early’. Shining refused to think of what that might entail. Velvet had been brushing her body against Dad all night, nuzzling him, rubbing her very blushed cheeks against his neck... Shining shook his head. No. He was not going to think about what was going on in that bedroom just one wall away. Thankfully, their apartment was in a high-end building, even by Canterlot standards, so the noise insulation was good. He was at no risk of hearing what was happening over there.

So, after going through all that in one day, he was very ready to just flop on his bed and enjoy the absolute luxury of doing nothing for a while. And soon, sleep. Blessed, blissful sleep.

Not yet, though. His door creaked open, then shut again. Hm... No way Mom or Dad would be coming out yet. So it must be... “Twiley?” he said, without looking up.

She gasped slightly. “How did you know?”

“You should never underestimate the mystical intuition of a B.B.B.F.F.” He was in no hurry to explain his suspicions about Mom and Dad, especially not to a cute and innocent little filly like Twiley. Dealing with knowledge like that could wait. It could wait a long time. Hopefully she’d never have to block out the kind of images that were trying to seep into Shining Armor’s imagination.

Twiley jumped up onto his bed. He could tell from the way it moved and the slight creak of the springs. The mattress was old. A hand-me-down from his parents, but it was bigger and better than the one it had replaced. She seemed excited about something – she was moving quickly. Jittery.

“I found some neat new stuff to read,” she said. Ah, that explained the excitement. “It has words in it that even I don’t know!”

Well that was saying something. Might as well give in and play along with her. She did deserve it, after all. She’d been so well behaved at dinner. Didn’t try to read a book at the table or ask a thousand questions to the waitstaff or anything. He rolled on the bed, turning toward her. “So, you want to play?” It was already well after her bedtime, but whatever. They could spare a little time to give her some fun. He could stay up a little longer, and so could she. “Soldiers versus the Evil Giant Unicorn?” That was a favorite of hers, though his old toy guardsponies were starting to take a real beating as her fledgling magic improved.

Twiley shook her head.

“Book fort?” That one usually didn’t go quite as well. Twiley tended to get distracted by reading one of the books before they could complete any tactically sound fort.

She shook her head.

Okay, time to bring out the big guns. “Dabble?” That was a word game that Twilight always beat him in, despite being so much younger. There was no way she’d say no to that.

Still, though, she shook her head no. What the hay?

“Then what?” He was legitimately at a loss. What could she want if she’d already passed up on all her favorite games to play with him?

“I just wanna ask you a question.”

He shrugged, still sideways on the bed. “Alright, I guess. Go for it.”

“What’s a blowjob?”

Shining choked, as if somepony had just knocked the wind out of him. He shot up straight in the bed, sitting on his haunches. Oh horseapples. Why couldn’t Mom or Dad be here to answer a question like that? Wasn’t she too young to know this kind of thing? But he knew she’d never stop trying to get her answer. That was just the way Twiley was. And he wasn’t about to risk knocking on his parents’ door and finding them in the middle of ... something. Possibly that very thing. “Where ... where’d you even hear a word like that?”

“Here!” She pulled a slip of paper out of her mane, laying it in front of his forehooves.

One free blowjob♥

Oh... Oh no... The coupons... And she’d presented it to him. He could already feel the familiar constriction of his muscles, the tightening around his chest. Even though it wasn’t Cadance giving him the coupon, the hex obviously didn’t care. It had been triggered.

No no no no no!

“Where...” He gulped, his mind both racing ahead and refusing to think about what had to come next, all at once. “Where’d you get that?”

“I found it under your bed!”

Ugh! He knew he should have found a better hiding spot. But Twiley knew all of his hiding spots. Where could he have put it? Nothing came to mind. His hooves feeling heavy as lead, he took the coupon from where she’d put it in front of him. What else was there to do? The consequences of not doing it were ... not to be risked.

But he couldn’t do it, could he? She was so young – and she was his sister!

What to do? What to do? Oh crap...

Twiley lunged forward, planting her front hooves on his chest so she could get all the way up in his face. “Hello! Equestria to Shining Armor!”

He groaned. There wasn’t any other option, was there? “Okay, um, so... Do you, um, know how colts are different than fillies?”

“Boys have a penis and girls have a vagina, duh!” Twiley rolled her eyes, as if he was being condescending to a much older pony.

Well, that helped, but... “Hey, who told you that already?”

Twiley grinned and settled back down onto the bed, looking quite smug and proud of herself. “Princess Celestia gave me full access to the Canterlot Library, and I can read an anatomy book, duh.” She deflated a little, looking away. “But it still didn’t say what a blowjob is.”

It was really uncomfortable explaining something like this to his little sister. She was so close. It was almost like he could still feel the slight warmth and pressure of her hooves on his chest. Then again, he’d have to tell her something, wouldn’t he? And he’d have to do more than just tell. The hex wouldn’t be satisfied by just telling her what a blowjob was. She’d given him a coupon, and the coupon had to be satisfied.

He hesitated for another moment before forcing himself to say, “Okay, well, um... I guess it helps to already know the anatomy...” There really wasn’t any use in putting it off any longer, was there? He could already feel a slight burning sensation in his gut, an itchiness in his hooves ... the beginnings of a compulsion to go to Princess Celestia’s next official royal audience. He took a deep breath. This was going to get weird. “A blowjob is when somepony puts a stallion’s penis in their mouth to make him feel good.” There. He’d said it.

Twiley cocked her head to the side a little. “Huh? How is that supposed to feel good? It’s supposed to be inserted into the vagina and deposit the stallion’s seminal fluid, resulting in the fertilization of an ovum. The book said so! Are you saying the book is wrong?”

“Well, there are other ways to do things besides just what the anatomy books say...”

Ugh! There was no way around it, was there? He had to. She presented the coupon to him! And he was not announcing his most embarrassing secrets in a public audience with Princess Celestia! That was not an option! Which meant... “Do you...” He gulped, then forced himself to continue saying what he absolutely should never say to his sister. “Do you want to try it?”

Maybe if she said no, that would revoke the hex and that would be enough? Oh Goddess... What if she said no and that didn’t remove the hex?

“Yeah!” Twiley said enthusiastically. “I got a free one. The coupon says so!”

He sighed. Well, no way around it now. “How did you even find these coupons?”

“I sensed magic coming from your room, and it felt dangerous, so I thought I’d protect you from it!”

Wait... What about the rest of the coupons? He darted to the edge of the bed, peering over and underneath. Then under the stack of comic books... They were all gone. All of them! “Twilight! Where’d you put them all?”

“Hidden away, where they’re safe.” She looked really proud of herself now.

Oh horseapples! He was really in trouble now, wasn’t he? Maybe, maybe he could convince her to give back the rest of the coupons. But what if giving them back to him activated the hex ... on all of them at once? He couldn’t! His mind just couldn’t process how that would be. No... He had to find some way for her to just tell him where the other coupons were, and—

Something poked at his sheath.

He jumped a little, looking back at himself. At the unholy image of his sister’s hoof nudging against the rim of his sheath.

“So... How am I supposed to get the penis to come out?” She leaned in closer, peering directly at the opening. “I can’t put it in my mouth if it doesn’t come out.”

Shining tried to ignore the sight ... but his eyes ending up drifting to an even worse place. As Twiley peered down at his sheath, she’d stuck her rump up in the air, not quite exactly pointed at him, but that little off angle meant that he could easily see under her tail. And while he normally used the restraint that any polite and civilized pony would exercise around their closest family members ... given the context of what was about to happen, he couldn’t help himself. He found himself staring right up under his sister’s tail. Between those heartbreakingly curved ass cheeks. At her petite and perfect little filly pussy lips. So smooth ... she’d probably never even been touched there... The little bulb of her vulva just stuck out so pertly and perfectly.

“Oh! There it is!”

Shining winced. Yep. He could feel it. His cock was beginning to slide out of his sheath. Because he’d been staring at his filly sister’s pussy. Oh Goddess ... how was he ever going to explain this to Cadance?

How little could he get away with and still satisfy the hex? He rolled to the side a little, giving her better access. “So, um, you just lick the tip a little bit, and that’s a blowjob.” A little white lie wouldn’t hurt anything ... not really.

Without hesitation, Twiley leaned forward and planted a long, luxuriant lick over his still-emerging tip.

Oh. Oh no. That felt way too good. More of his cock slipped out, emerging rapidly and starting to stiffen already.

Twiley licked it again, tonguing almost his whole length this time. “It tastes funny ... but it’s really warm, and I like the way the skin feels!”

He forced himself to put a stop to this before it could get any worse. “Okay, that’s enough, now let’s—”

She didn’t stop licking. If anything, she went at it even more, flicking her tongue back and forth across his shaft as she slid across it.

He moaned. He couldn’t help it. She had no right to be this good at it! And there was no denying things now – he was getting fully hard, his cock dragging against the bedsheets as it fully stiffened, forcing him to turn further on his side ... which only gave Twiley even better access to it.

“Ooh! It’s getting much bigger now! Can I lick the rest of it too?”

She was already licking everything he had. What was she talking about? He hated himself for saying it, but at this point, the damage was already done, right? “Um... Sure, go ahead.”

As it turned out, what Twiley meant by ‘the rest of it’ was his balls. She went down there with the same single-minded attention she’d been giving his shaft, sliding her little filly tongue cleverly around each and every curve of his balls, even nuzzling around them and licking the sides of his sack. Even as accustomed as he was to Cadance’s amazing blowjobs, Twiley was making him tingle all over and making his cock arch hard against his belly. To be feeling like that from her ... his own sister! She was so cute down there, going at it so earnestly!

Next thing he knew, she was working her way back up his shaft, tracing every vein and contour as if she was trying to memorize it. Maybe she was. This had to be the first erect cock she’d ever seen in real life, right? Didn’t she realize how weird it was for that to be her own brother’s cock? Apparently not. She slid her whole mouth up the side of his cock like it was nothing.

“Oh wow,” Shining mumbled, unable to help himself. “That’s nice... Just like that.” He jolted, though, when he felt his little sister’s lips close around the tip, taking it into her mouth. “What—” He gasped. “What are you doing?”

She pulled off of his tip with an audible pop. “Did I do it wrong? You said I’m supposed to put the penis in my mouth, right?”

“Um, right ... I guess.”

Twiley went right back to it, taking his tip into her mouth again, as if this was something she’d done a hundred times. As if it was no big deal to be putting a much bigger and older stallion’s cock in her mouth. As if they weren’t brother and sister! She hummed in contentment as she slightly twisted and bobbed her head, working her tongue over his tip while still inside her mouth. Her little pussy winked open, showing the hot pink inside, easily visible with the way her tail was rising up.

She was ... enjoying this? She had to be! He stared at her little purple pussy as it winked open again and trickled out just a tiny bit of filly nectar. So cute! And so undeniably sexy. She was growing up faster than he’d realized. And she was definitely into having her brother’s cock in her mouth. And maybe even more than her mouth? When her pussy winked open again, showing a hint of the untouched depths inside just above her tiny heart-shaped clit, he couldn’t help but imagine plunging into that tight warmth.

That image, combined with Twilight’s earnest efforts on his tip and the vibrating pleasure of her little humming moans ... it was too much for him! His tip began to flare inside his sister’s mouth.

It was obviously too much for her. She choked a little, then yanked herself off of his cock, sputtering. “Ugh! It got too big for me!”

Though he probably could have stopped at this point and still satisfied the hex, Shining was too far gone to stop now. More than just the hex needed satisfying. He was breathing heavy, every muscle tight, every vein standing out. So close... “It’s okay,” he told her, “just keep licking it.”

“Okay!” Twiley went right back to it, stroking his shaft lovingly with her deft little tongue, once again reaching the farther places she hadn’t been able to get her whole mouth around.

He had no right to feel so good from his sister’s tongue. But she was just so soft and gentle with him, so teasing and yet so fulfilling! Cadance gave insanely good blowjobs, but getting one from her was usually an onslaught of intense pleasure. The soft, almost teasing touches of Twiley’s delicate licks were sending fire through his veins, building up far more pressure than Cadance usually made him suffer through.

Without thinking about what he was doing, without thinking about the ramifications of it, he reached one hoof out and touched Twiley’s pussy. So soft and yet springy under the frog of his hoof. So warm. It winked against him, kissing her virgin wetness against his hoof, and she moaned against his cock. She sure didn’t seem to mind being touched... His flare grew even bigger, even stiffer.

“Twiley,” he gasped, “I’m—”

His warning came too late. Or maybe his cock came too early. Either way, it meant that Twiley’s cute, innocent little face was absolutely drenched by his first blast of cum. She’d just come back to the very tip of his cock, which meant each powerful throb poured a thick stream of cum all over her face and mane, splattering a bit over the rest of her body, too. Some of it even got on himself – she’d really gotten him worked up!

Twiley squealed and giggled as she squeezed her eyes shut and let herself get covered, though. As if being showered with her brother’s cum was just another one of their games.

A knock came from the door. “Keep it down in there, please. Your mother’s trying to sleep.”

Shining’s heart skipped ten beats. He expected Night Light to open that door at any moment and see the last of Shining’s cum dribbling out onto Twilight’s muzzle.

Thankfully, though, the door stayed shut. And there was no further sound to make him think that Dad was still out there. It took an active effort of will for Shining to force himself to breathe again. That had been close! He didn’t even want to think about what might happen if Night Light had just walked in on the two of them like this!

Twiley was still giggling, though she’d toned it down to more of a whispering level. “That was fun!”

Reeling with post-nut clarity, Shining pulled his hoof away from his sister’s pussy and slid a little distance away from her on the bed. “Yeah ... it really was. I won’t deny that. But we can never do that again, okay? Brothers and sisters aren’t supposed to do this kind of thing with each other.” He glanced around, wincing at the mess. “Now, let’s get you cleaned up before...” Before somepony noticed the cute little filly plastered in fresh cum, of course ... but it didn’t really feel right to just say it like that. Thankfully, he and Cadance had some extra rags and wet wipes stashed around his room, for just such occasions. Cadance usually swallowed it all, but there could always be the occasional unplanned mess.

Twiley acquiesced easily enough to being wiped clean, though she was still grinning like a little idiot. Like a dangerously intelligent little idiot... Which brought up the topic of the remaining coupons...

“Now Twiley, we need to talk about the rest of the coupons, okay?”

In response, she only giggled again. Giggling like she had a secret, like she was playing some kind of joke on him. Oh ... that didn’t sound good. He didn’t like the sound of that at all...

Author's Note

This story was chosen by my SubscribeStar supporters! Every month, I take suggestions from my supporters and they vote to decide which story idea I'll write next.

If you want to help tell me which stories to write, go to my SubscribeStar page and pledge $5 or more. Then you'll get to vote on which story from my ideas list gets written next and add your own ideas directly to that list!