The next morning, before Twilight woke up, Shining went to the kitchen and took the bottle of Firehoof whiskey out of the freezer. He took a small, clear glass from the cupboard, filled it up until the whiskey was almost overflowing the edge of the glass, and then downed the whole thing in one gulp. He shuddered as the cold fire coursed through him, warming up his bones and parts of his body next to his bones he didn't know he could even feel warmth in. Most of all, his head felt fuzzy and electric. He knew he could say what he needed to say now.

It was the first thing out of his mouth when Twilight opened her door.

"Twilight—"

"Shining—"

She opened her mouth at the same time. They both paused for a moment, caught on each other's words, then blurted it out at the same time.

"We can't have sex!"

"We have to have sex!"

The two stared at each other, mutually dumbfounded. The echo of their words reverberating through the hall, their ears, and then perpetually, their heads, eventually blended into silence, save the pair's soft breathing, each standing with hands held to their sides.

"What are you talking about?" Shining asked. His face twisted, approximating its best 'horrified', and then wondering if it was too much, and dialing it back a little, now looking kind of like he'd just smelled something underneath his shoe. He settled on a dejected looking deadpan, because anything he didn't orchestrate and plan very carefully at this point was likely to get him in trouble.

Who gets the key to a new car and then throws it away? It's like ordering steak and then eating the pepper packets.

Shut up. We're doing the right thing. Cadance would want—

"We have to have sex, Shiny. I can't take it anymore!" Twilight ran towards her brother with her arms outstretched and pulled him into a tight, squishy hug before he could move away. "Cadance told me how bad you wanted to do it, and I've had a thing for you for soooo long, since we were kids, and it's just such a perfect opportunity and you never seem to want me and SHINING JUST HAVE SEX WITH ME FOR CELESTIA'S SAKE!"

Shining looked down at his sister, the few inches between them somehow making her seem just as small and vulnerable as she had when the age difference had highlighted their difference in proportions. Her eyes were wide, almost tearful, and she was frowning, looking back up at him, not begging, but pleading, throwing her final assault against the already flimsy wall of his moral standards. But what was that about...

"Cadance told you?" Shining asked. His mind flashed to a vision of his wife, her hair flowing over her shoulders as she tossed her hips forward and back, bouncing up and down on top of him and then leaning forward to nibble on his earlobe. 'Tell me your naughtiest fantasy,' she'd said, giving the inside of his ear a forceful lick before righting herself and returning to her rhythmic slamming up and down onto his cock. It was one of their first nights together after being married, long before the toy closet, long before the swing and handcuffs and any other dark threads had wormed their way out of their two brains and tangled together. He'd bit his tongue, literally, to keep from saying it, because it was very hard not to do everything a pony working your cock like that asked. Eventually, as he was about to cum, she'd leaned in again and whispered the same question, and that had worked the answer out of him just as much as she'd worked the load out of his balls.

'Twilight,' was all he whispered back, and then groaned wordlessly as he pumped one of many of that night's raw loads into his wife's pussy.

'Twilight?', she'd said back to him, grinning wickedly, and then growling like a feral animal. She'd pounced on him again, and from there the night had spiraled into so many deviations and diversions it had set the course for the next few years of their sexual adventures and then some.

Cadance had been, to put it bluntly, overjoyed. Why didn't you tell me, did you ever try anything when you were kids, that' sort of thing. I don't know, no, Shining found it hard to talk about. But once the shell had been cracked open, Cadance was sure to keep prying, insatiably hungry for the pearl inside.

So she must have told his sister. And if she'd told her, even though Shining was adamant their roleplay with Twilight's name at night was purely in the realm of fantasy... that was as much approval as he needed.

But it was still wrong, wasn't it?

"I know what you're going to say," Twilight said, sniffling a little and finally releasing her brother from her strangle-hold hug. "And I knew you'd be mad that Cadance told me. But look! In Equestria, there's a precedent for incest, dating as far back as Star-Swirl the Bearded. And it's not like we'd have to tell anyone. Besides Cadance, of course, she already knows..."

"Of course she does. Why didn't I guess that the two of you set this up from the start." Shining looked suddenly towards the window, expecting to see some sort of parade or celebration going on outside on the front lawn. Then he looked back to Twilight. "Is Arbitrary Quarantine Week even real?"

"Oh, come on," Twilight said, rolling her eyes. "Even we wouldn't be silly enough to come up with that. It's real. As real as the Equestrian government, anyway."

"Not very then."

"Shining!"

"Sorry."

So it was the two of them in the living room, couch with scattered blankets, and Shining's mind half-blank, half-on-fire from his glass of whiskey. And there was Twilight, predictably still in her PJs, only inches in front of him, hands behind her back now, kicking the ground like a little schoolgirl, which she would have looked even more like in her schoolgirl outfit, which wasn't to diminish the pajamas, that was...

"So do you wanna do it or not?" Twilight asked. She spun a strand of hair around her finger, tucking the purple and pink into a tight spiral and bringing it up to her mouth.

"With you?"

"Yes, dummy!"

"Oh. Right."

Shining looked around the living room.

"I mean, not here. But Twilight, look, even if Cadance says it's okay—"

"Haven't you ever done anything fun in your life?" Twilight asked, standing suddenly closer and shoving her nose in her brother's face, smooshing it up to his. "You don't wanna keep a secret and be my BBBFF and pound your little sister's pussy so hard your wife can hear it while she's on vacation?"

"You know I do. But it's not that simple."

Twilight kissed him and grabbed his dick through his jeans with one hand. She squeezed it under her fingers, massaging it in her grip until only a few seconds later, it started to get hard in her hand. Then she switched to rubbing up and down, her palm flat over her brother's jeans, her tongue tangling with his in his mouth and dribbling saliva down both their chins.

When she was happy with the level of hardness underneath her hand, which was sure to leave her brother's jeans tight and more than uncomfortable, Twilight pulled down the zipper between her fingers and reached her hand inside the new entrance.

Shining was done objecting. His mouth was doing one thing, and his brain had left the building to watch from the bleachers. Twilight's hand was on his cock through his boxers, now she was searching through those too, undoing the tiny button, reaching in and pulling his whole length out, out of his boxers, out of his jeans, eight inches hard and hanging out in front of his sister.

"Let's go to the bedroom at least," Twilight said, licking her lips and staring at her brother's cock. "I don't wanna make a mess on the couch."

Twilight took her brother's hand and led him wordlessly down the hall, back to the bedroom he'd abandoned for the last five days.

The room looked mostly the same, minus the addition of several stuffed-full bookcases and pieces of Twilight's clothes littering the bed. Even the restrains fastened to the headboards seem to have fit nicely in place after someone took them out from wait a minute...

"Twilight, did you put those—"

"Cadance said you could teach me about some of this stuff," Twilight said, her voice fast and enthusiastic, her cheeks flushing red with blush. "Like that movie last night, um, I was kinda sorta hinting I might—"

"You wanted to try something like that?" Shining looked around the room for any other signs of the toy-chest being opened. No handcuffs yet. No blindfold.

But how much had Cadance told her?

"Cadance said you're really good at, uh... Dom... stuff..." Twilight looked down to the ground, a rare crack in her so far embarrassment-proof veneer.

Shining Armor raised an eyebrow.

"Did she now?"

Maybe time to have a talk with the wifey on return about 'privacy standards'...

Naw, we'll just give her the belt and make her count the strokes until's begging to be let go and can't sit for a week straight. She knows what happens to bad girls.

"What exactly do you want to know?"

"Well, um, I've always want to, uh, try, kind of like, uh, you know... stuff that, uh... jeez, it's hard to say all of a sudden, for some reason." Twilight bit her lower lip and looked at her brother with deep, sorrowful eyes.

"It's okay. We'll start from the beginning."

Shining knelt down next to the bed and looked underneath for a small basket. It was full of fashion accessories, from goggles and glasses to more than a few necklaces, ear-rings, and collars. Shining shuffled through them before selecting a small, plain black collar, and stuffing the basket back underneath the bed.

"Here," he said, offering the collar forward to let Twilight see it for a moment, then pointing down to the ground. "If you kneel, I'll put this on. It'll signify that we're starting to play, and anything from here-on-after is part of the 'scene' we're doing together. If you take it off, I'll go back to treating you like my sister Twily, okay?"

"But I still want you to treat me like your sister Twily," Twilight said, grinning as she turned and knelt in front of her brother. "Just your naughty, obedient little sex sister."

"Aren't obedient and naughty a contradiction?" Shining checked the tightness of the collar with his finger between the material and Twilight's neck, making sure it wouldn't strain, but would still stay snug enough not to toss and annoy her on moving. He fastened it behind Twilight's neck, and tucked it behind her hair, leaving on the front visible as she turned around smiling.

"How do I look?" she asked, her eyes wide.

"You look... good. Ready."

Twilight gulped nervously, but nodded, her eyes taking on a familiar steely resilience. "I am ready."

"Good. Now we need a safeword. Something you can say at any moment to end the scene and go back to reassurance and safety."

"Can't I just take the collar off?"

Shining smirked at her.

"You might not be able to use your hands."

"Oh."

Twilight's mouth scrunched together, her eyebrows furrowing as her thoughts deepened. Her cheeks were still flushed red, and she'd been unable to contain a tiny giggle as the scenario Shining had placed in her head had danced by in the corner of her mind's eye, something like her, face down, ass up on the bed, her hands tied behind her back and her brother's big, muscular frame getting ready to mount and fuck her like a wild stallion...

"How about cardamom?" Twilight said, the light-bulb suddenly flickering on.

"Cardamom?" Shining's tongue seemed to trip over the syllables. He was checking a few things in the bed-side table, lubricant, check, whip, check, belt, check, nipple-clamps, check... not to say everything would get used tonight. But Twilight was nothing if not an eager student.

"Yeah. It's a good word. I like it."

"Sounds good to me." Shining picked up the belt and stretched it between his hands, checking the firmness and finding it just a little bit lighter than his preference. Still, probably better to start extra small with the newbie.

"So... what now?"

"Let's start by seeing how you take orders."

Shining was still hanging out of his jeans, a situation he hadn't adjusted since the living room, and his cock was still rock-hard, standing up straight and teasing Twilight with the engorged tip which had already begun to leak a small bit of precum. Twilight licked her lips again at the sight of it.

"First, get on your knees and service your... Master's cock."

Twilight's eyes gleamed brilliantly, desperate and innocent. Slowly, shaking a little, she got to her knees in front of her brother again, this time facing towards him. His hard cock twitched in front of her face as she raised a hand up to it, wrapping her fingers around the base of the shaft and only covering half the length of the girthy thing. Twilight moaned quietly to herself as she felt the soft-but-hard fleshy texture of her brother's dick underneath her fingers.

"Yes... Master." Twilight took one last deep breath before leaning forward and taking the tip of her brother's cock in her mouth. Immediately, as though she'd been waiting, or trained for the moment, her tongue sprang into action, circling around the base of Shining's cock-head and lapping at the tip to get a taste of his dripping precum.

Finally through the door. Hope Princess Celestia doesn't find out about this.

Shut up or you'll get the belt too.

Yessir.

Already, Twilight's mouth was a distinctly different experience than his wife's. Where Cadance's attentions were diligent, dutiful, almost like a servant, Twilight had begun going to town on Shining's cock like it was the last on earth, the only satiation for a fantasy that had been burning over a decade, the last morsel of sustenance under a blackened sky.

Her tongue was as wild as her eyes, swirling around his head and shaft as she sucked. Her spit was everywhere, drooling and coating her lips, chin, every inch of his cock, and dribbling down to his balls as well. Twilight wasn't able to take the full length of his cock—not at first, anyway—but even as she warmed up to it, her hands were at the base of his shaft, both sides, pumping up and down to cover the few inches she wasn't able to ram inside her mouth. And then, as Shining watched, his star pupil grew before his very eyes, steeling herself with a look of horny determination and working down Shining's cock, half-inch by half-inch, until just a few fingers were left at the base, and then her lips pressed all the way to the bottom, her tongue licking at Shining's balls as she rocked her head up and down, gag-free, on all eight inches. She even started to find a rhythm, and play with Shining's balls with a free hand while she continued milking his cock with her mouth and tongue.

Once he was at maximum hardness¹ and fully satisfied with Twilight's eager demonstration, Shining placed his hand on Twilight's head and took a hold of her hair. He pulled her head up gently, not jerking, but still eliciting a small whimper as Twilight removed her lips from her brother's cock, spit dangling between them, her lips frowning as she stared helplessly at her brother's cock.

"You want more?" Shining asked, his grip tight on a bundle of Twilight's purple-streaked strands.

Twilight nodded hungrily, her tongue hanging out a little at the side of her mouth, making her look a bit like a helpless puppy. "Yes," she said, and looked up at Shining, her eyes glimmering brightly.

"'Yes, Sir'," Shining corrected with a short tug on Twilight's hair, which elicited a tiny panicked yelp, though it was barely painful, by Shining's estimation. "Or 'Yes, Master', if that's easier."

"Yes... Sir..." Twilight seemed to smart extra from the tug on her hair, and her pouty frown looked extra bratty as she glared up at her brother, his cock still dangling hard and spit-covered in front of her face.

"Lose your clothes then. And turn around," Shining said, finally releasing his hold on Twilight's hair. "On your hands and knees. We'll see how you handle the belt."

"Did I do something wrong?" Twilight asked. She began to remove her clothes regardless, seemingly eager to finally get them off, springing out of her shirt and jeans with relative ease but struggling at little with the clasps on the back of her bra, suddenly stubborn under her over-urgent fingers. Finally, after a half-minute struggle, the thing came loose, and Shining Armor got his first full look at his sister's naked, gorgeous breasts, in all their heaving size and glorious beauty. When Twilight bent over to slide her panties down to her ankles, and then flung them to a corner of the room with a distinct wet-patch in the center, Shining knew he'd made a good decision at some point in his life, whether that had been marrying Cadance or believing her when she'd told him his little sister fantasies would never leave the privacy of their bedroom. With them in it, at least, anyway.

"No," he said. "You haven't done anything wrong. But you need to be introduced to pain if you want to play. Not just because I enjoy it, of course..."

Twilight took her position, turned around on her hands and knees, spreading her legs slightly to give a good view of her dripping wet pussy to her brother, and waggling her hips from side to side for good measure. She looked at him over her shoulder with puppy-dog eyes still in place, ever his younger-sister pleading with him for protection.

"You like hurting me?" Twilight asked, her eyes more innocent than they'd been since the start of her dick-sucking. "I mean... you like the idea of hurting... your little sister?" Twilight made her eyes extra wide, extra precious, and bit her lower lip, shaking her hips again to punctuate her sentence.

"Yesss," Shining groaned. He licked his lips, staring at his sister's bobbing butt and pussy for a moment before kneeling and again reaching below the bed, this time for a simpler implement. The one in the bedside table was too thick, certainly. And there were reams of them scattered about the room, probably, he had such a collection he was always losing them...

There. The thin one. That won't be too bad, will it?

We'll have to wait and see.

"Turn your head," Shining instructed, testing the belt with a stretch and finding it firm, flexible, and rather thin, probably not much thicker than a folded stack of paper. Wouldn't sting too much, hopefully. He folded it once over and took the clasp and buckle in his hand, always the perfect hand-hold. Once he was sure Twilight's head was turned, and she was staring at either the floor or the opposite wall, he pulled the ends tight suddenly and snapped the belt together for good measure, which made Twilight yelp and jolt suddenly on all fours. But she didn't turn her head.

Good girl.

"What was that?" Twilight asked. Her hips shook again, this time with nervous energy, all her willpower fixated on keeping her head from turning around.

"Just a belt. A small one. We'll start with five and see how you do."

"Five?" Twilight bit her bottom lip and tensed her butt, imagining the force of impact and the mark it might leave afterwards. It already seemed to sting.

Shining nodded, mostly to himself. "Mhm-hmm. Five. And I want you to count out loud after each one. That's to keep you focused on the pain, to keep from distracting yourself. Make sense?"

"Yes," Twilight said through clenched teeth. She had already been formulating visuals and bits of sentences she could assail herself with to keep her mind away from the belt... but now that was going to be much more difficult.

"Good. Try not to tense yourself too much. Just relax and breathe. And remember to count."

Twilight nodded and closed her eyes, lowering her head almost all the way down to the floor.

When Shining pressed the belt to her back-side, it felt cold, but not like steel or ice. Just... colder, as though her brother's touch had been separated somehow, and only half an inch was left between the contact of skin on skin.

Shining pulled the belt up above Twilight's butt and let it rest in the air for a moment, squaring the distance and force of blow. When he swung, the belt made a soft 'swoosh' as it cut through the air, and a sound so similar to a hand on Twilight's ass you could mistake it by catching it through the wrong ear. Twilight, surprisingly, was almost silent, simply gritting her teeth and letting out a barely-more-than-inaudible grunt, rocking forward a bit and curling her fingers into the bedroom carpet.

Shining waited a few seconds to let Twilight collect herself, then another few seconds to see if she had remembered her duty. Her cleared his throat in a loud and purposeful manner.

"Ahem," he said, snapping the belt quietly between his hands.

"Oh," Twilight said. "Fuck. Sorry... sorry, Sir," she corrected her self. Her fingers dug in extra hard to the carpet. "One."

She might tear that up after four more.

It's fine. It's an ugly carpet anyway.

"Ready for the next one?"

"Are you going to ask that every time?" Twilight dared a glance over her shoulder, brattiness bubbling up and making her stick out her tongue for extra sass. When she noticed her brother's hard, unchanging expression, she followed up to his eyes, which were deeper and colder than ice could have dreamed of being. He stared at her, unblinking, until she turned her head away, back down to the floor, her cheeks flushed.

"Sorry... Sir," she said, after a few more seconds.

"Forgiven. Are you ready for the next one?"

"Yes, Sir."

There was no anticipation this time. Shining rose the belt and lowered it in the same swift motion, lashing the thin black strip over Twilight's exposed butt, the left cheek this time, instead of the right. Where there'd been a dim, single-line glow before, this strike left an angry, red patch, blossoming out from where the point of contact had stung the most.

Again, Twilight rocked forward with the impact, grunting, loud enough to hear, louder than last time. She gritted her teeth and released her hold on the carpet, then reassumed it on a different patch. She groaned and rubbed her legs together, and a dripping, clear line of her wetness began to dribble from her pussy down to the carpet below.

"Two," she said, her voice high and strained, panting through her attempts to collect her breath.

It was best to give her time to breathe, after all. Shining allowed a full minute for Twilight to gather her senses and deal with the feeling of her brother slamming her ass with what felt like a white-hot brand. The feeling was new, and it was a combination of lusts, two worlds unlocked for the price of one and both overflowing and flooding her before she'd had time to even walk through one of them.

But she was clearly enjoying herself. There was that familiar smell again, once more like Cadance, but different. Shining wondered if he'd explored more before settling down if he'd have collected a fragrance encyclopedia, distinctions and deviations between the many mares that had attempted to solicit his attention before Cadance had entered his life. What if he'd gotten a taste of Twilight much earlier? It would certainly have curved his palette, so to speak.

"Aren't you gonna hit me again... um, Sir?" Twilight's voice was perpetually innocent, not so much in the sense that she'd never thought of sex or even imagined it before, but that no matter how much she'd dreamed, every experience was now genuine and real and new to her, impossible to distance from, tingling through every inch of her skin like swallowed lightning. It was impossible to put in the words the way the tingling felt. Every time she found one way to say it, to describe her pussy quivering, or gushing, or her nipples aching and then screaming with joy as she pinched them, or even her mouth, finally getting to taste her brother's tongue, and how her panties had become soaked almost instantly the moment their mouths had met... It was all a secret. From everyone and the world. Well... except for Cadance. Eventually.

"Just wanted to make sure you were ready," Shining said, smiling at his sister behind her waiting and double-red buttocks. "Remember to breathe. And your safe word is 'cardamom', okay?" Say it and we'll stop no matter what."

Twilight nodded. She turned her head and smiled at her brother, a devilish gleam in her eyes and her tongue sticking out of the corner of her mouth just a bit.

"Don't worry. I can take it... big brother."

Shining returned the smirk, and his cock twitched, still gleaming with the leftovers of Twilight's sloppy blowjob.

"We'll see what you can take in a bit. Number three, coming up."

Shining waited until Twilight's head was dutifully turned before delivering the third strike, this one again on the right cheek, but down a little further, neighbouring Twilight's exposed, dripping pussy, and maybe even giving it a little tiny slap with the tip, the way it was aligned at a diagonal just so.

There was no holding back this time. Twilight let out a loud, shocked-sounding gasp, and her whole body shuddered, this time not just forward, but all at once and all in place, her limbs shaking as she struggled to keep her balance, her pussy squeezing and gripping at nothing but the air as the sharp lightning spread from between her legs all the way up to her nipples, ostensibly clouding somewhere in her brain as well. Her mouth felt like she'd chewed on a battery, and her tongue wanted no part of making words.

When she remembered to breathe, Twilight gulped the air down in large gasps, filling her lungs to the brim before finally letting the air back out. Every limb seemed to be used for balance. And her hips waggled, no longer shaking, but bobbing slowly from side to side, as though she was following the rhythm of some invisible line, rocking her body back and forth on it like massaging her pussy on a balance beam.

"Fuck," she said simply. Then, "Th... three. Sir."

"Very good. That's a very good girl."

"Call me Twily," she asked, her voice half-moaning, desperate. "Please."

"Ready four number four, Twily?" Shining asked. He raised his belt-free hand to Twilight's butt and squeezed her left cheek, the one that had been half-spared from the assault so far. He kneaded and squished the dough-like flesh of Twily's enormous ass in his hand for a good while before slipping his thumb down to between his sister's legs and running along the full length of her gushing slit.

Twilight gasped, and jerked her hips towards her brother instinctively, but as soon as it had come, his thumb was gone, as was his hand, the first time he'd touched her naked like this, unless you counted the belt as an extension of his body. Twilight's mind was on fire. It was a mountain to climb not to turn herself around and dive on her brother's cock this instant.

But she held fast. Head forward. Then down. Hands on the carpet. Feet touching the floor. Wiggle your toes. There you go.

"I'm ready," she said, her breathing loose and punctuated with intermittent groans and clenching together of her legs. "I mean... I'm ready, Sir."

"You don't need a 'Sir' every time," Shining said. He smacked the belt down over Twilight's left cheek, higher up, this time leaving her pussy alone but also casting a bordering red mark alongside the first on Twilight's left side.

Twilight hissed through her teeth and tensed her body tightly, squeezing her butt-cheeks together and her legs as well, rubbing them against each other and whining as the small amount of friction cause her pussy to drip another clear strand of girl-juice onto the bedroom floor.

"Four," she said, loud, like she could barely yell the word out through the hail of blazing fire running through her body. "Please, Master, one more, then let me touch you, I want to touch you so bad..."

"Patience, Twily," Shining said. Twilight groaned at the sound of her pet-name, her pussy again squeezing the air like it was Shining's cock, her lips wet and puffy as they reached for the shaft that wasn't yet there. "It's not becoming to beg like that. Behave yourself and you'll be rewarded. Understood?"

"Yes Sir!" Twilight moaned. She shook her hips up at her brother and reached her hands behind to spread herself even wider, giving a peek at the pink inside of her pussy and the hole that she wanted Shining Armor to fill.

"Good. Then here's the last one. Get ready..."

Shining held the belt in the air for a while, considering it like a whip, so generic as an implement in general, and now not useful for keeping anyone's pants on at all. Twilight's hips waggled back and forth as she waited, moaning and whining under her breath into the carpet, her pussy getting wetter with each second that passed without impact.

After what felt like an eternity, which was an amount of time only relative to how long Twilight had waited to be naked with her brother in the first place, Shining brought the belt down for the fifth and final time. He hit both of Twilight's cheeks, overlapping where they joined together like halves of a peach, and hard enough to leave a mark for today, tomorrow, and maybe bruises for a while after that.

Twilight, unsurprisingly, groaned and rocked forward as the belt slapped across her ass. But this time her hand shot between her legs and rubbed, and within seconds of the sensation of Shining's smallest belt bruising her with raw force, she was cumming, soaking her fingers in girlcum and moaning incoherently as she came, save the few mentions of her brother's name.

"Shiny! Shiny, I'm... fuck, fuck, fuck..."

Oh, and the swearing too. Twilight had a filthy mouth in more way than one, it seemed.

To watch Twilight shake and shudder in the throes of her orgasm on all fours, while he stood behind her with belt in hand and knew they'd stepped only a foot into an enormous field with expanses further away than the horizon? It was a special privilege. Shining crossed his arms over his chest, still for some reason wearing a shirt, but feeling like the Captain of the Royal Guard was a paltry title in comparison to the power he really commanded, here, in the bedroom.

And when Cadance got back...

"When you're finished, you can get on the bed," Shining said. He tucked his arms in and pulled his t-shirt off over his head, then threw it towards the laundry basket, which, he noticed, was overflowing still with Cadance's clothes, his, and now, Twilight's. Apparently he'd forgotten to do the laundry at all this week. Though avoiding the bedroom on a permanent basis could do that to someone...

"Yes, Sir," Twilight said. She got up and made her way to the bed almost immediately, only pausing right before she got on to let a shiver run through her body, and then to take her hand to her mouth as though she'd suddenly realized how wet her fingers were, and licking them off one by one, lingering each time at the tip until she'd cleaned them completely. She looked back at her brother with a smirk and a giggle, then got onto the bed, and laid down on her back, facing up at Shining, her legs spread and feet already lifted up to her head.

"Like this, right?" she said. "I saw it in a picture once and I've always wanted to try it."

"That should be fine," Shining said. It was amazing what years of reclusive schooling and an apparently prodigious porn collection to do to someone's ability to navigate sex. Even if you didn't have any idea what you were doing, you could imitate porn until you got it mostly right. Or, Celestia forbid, communicate with your partner.

"How do you feel about choking?" Shining asked as he got onto the bed. He took his spot between Twilight's legs and drank in the sight of his exposed little sister like an aged wine. It had been aging, certainly, since their adolescence, when Twilight's sisterly crushes were innocent and neither of them had suspected what a week in confinement could do to supposedly natural and healthy hormones bouncing around with fantasies of incest in your head. Now he had given his little sister five marks she would remember, and tickled her pussy with his hand regardless. He had watched her cum all over his bedroom floor.

"I've never done it before," Twilight said, her voice briefly timid, but quickly regaining its determined tone. "But I wanna try it. With you... Sir."

"Twilight?"

"Oh... yes, Shining?"

"I'm gonna fuck you so hard you might pass out."

"Oh, Shining... I mean, Sir..."

"Either one is fine," Shining said. He wrapped a hand around his cock and lined it up with his sister's entrance, already moist and dripping, quivering as his head touched against the lips, then poked inside just a bit, parting his sister wide with just the head of his cock.

"Are you new to... well, to everything?" Shining asked. He didn't want to push further with his cock until he was absolutely certain what kind of resistance he'd be encountering.

But Twilight looked up at him with eager eyes and shook her head from left to right, her hair glittering, flowing in long, delicate strands over her arms and shoulders, tinged ever-so-slightly with sweat.

"No," she said. "I've done plenty on my own, and Spike and I fooled around one summer when we were at research camp together. Ugh. Don't remind me though."

"You and Spike..." Shining trailed off, imagining his sister's hapless green-haired assistant following her around with persistent focus, usually carrying an armful of books. Was the kid even legal?

Are you going to fuss about off-screen love-making legalities or are you going to jam your cock into your little sister's waiting pussy?

If she's waited this long, she can wait a second longer.

But, it was a good point. If Twilight was ready, and Shining Armour was ready, no reason not to... go ahead with things.

By which Shining meant he could now slide the whole head of his cock into his sister's moist slit, and then start going even further, pushing his hips forward and burying four, five, more than half, then almost all the way, until finally it seemed Twilight was at her limit, just an inch before the base of Shining's cock had reached her eager pussy-lips.

Twilight looked down between the two of them and licked her lips, swallowing in the sight of her brother's eight-inch member finally slid inside her. Just one more inch and she could say she'd taken the whole thing. Twilight grit her teeth and furrowed her eyebrows as she squinted with focus, staring at her brother's cock as she forced her hips up, forced herself, even though she felt full, to take the last inch, to bury her brother's cock all the way inside her, and feel his head pressed up against the very limits of her pussy. Twilight let out a long, throaty moan, and couldn't help herself from drooling a little onto her chin and chest. It felt even better than she'd ever dreamed.

Then there was Shining's hand at her throat, just above the collar, his firm, masculine fingers wrapping around her flesh but not tightening. Just yet.

Even before he'd begun to choke her, Shining could feel Twilight's nervous energy threatening to overflow. She was bucking her hips up at him even though he hadn't yet begun to move, and her eyes were wild and panicked, darting from side to side and then settling occasionally on the base of Shining's cock smacked up against Twilight's pussy-lips.

"Do you need to me to stop?" Shining asked. He loosened his grip even more, barely letting his fingers rest on Twilight's pale, vulnerable neck.

Twilight shook her head rapidly.

"N-no, I just... I think I'm going to cum soon, Shiny..."

"It's traditional not to cum without your Master's permission, you know."

Twilight squealed and her pussy clenched around her brother's dick, squeezing it extra hard and eliciting a low groan from Shining.

"Ooh, of course, that makes... that makes sense," Twilight said, managing to fit the words in between the unconscious motion of her hips, up and down, rocking back and forth the almost-inch she could get with her own motion. There was no space left, her brother had pushed so far into her, and he was so big inside her...

"Do you want to cum?" Shining asked. He made to withdraw his hand from Twilight's neck, but she grabbed him with both of her hands and pulled him back, placing his fingers firmly again around her soft, nubile throat.

"Please," she said. "I was so close, when you... when you put your h-hand, around my neck..."

"Like this?"

Shining tightened his grip for the first time, and felt a jolt run through Twilight's body under his fingertips, causing her to practically jump up from the bed and slam herself into him again.

"Yes!" Twilight gasped, not hurting for oxygen in the slightest, but simply overcome by the sensation of her brother's masculine hand tightening over her precious airway. The way he could clench so quickly and wring her out like a helpless doll... it thrilled her from her head down to her pussy. Especially her pussy.

"Don't cum yet," Shining said with an instructional tone, commanding and firm, but sympathetic. He could tell from Twilight's response in whimpers that he'd ask for no simple feat, but Twilight's look of determination returned as it always did, and she bit her lower lip at him to show off her staunchness.

"Okay," she said. But her eyes gave her away. They kept darting down to her brother's cock buried inside her, and each time they did, she would moan desperately, rocking her hips even harder than she already had been, begging for just the tiniest thrust, just even one quick slam...

"Don't cum yet," Shining said. He drew back his hips slowly, letting his sister watch every glistening inch of his shaft as it came into view, and giving her a few seconds to admire it before slamming back in so hard it caused the headboard to slam against the wall, and jostled Twilight on the bed besides.

Twilight moaned like she was in heat². She looked at her brother with the most desperate, needy eyes she could conjure, and found the word on her tongue as though it had been prepared.

"Please," she said, half-muttering it, half-forcing it through another high-pitched moan. The instant Shining had bottomed out inside her again, her pussy had begun to squeeze his cock and wouldn't stop, like it was forcing her to remain on the edge of a cliff hanging by only her fingers. "Shining, please, I need to cum, I can't hold it much—"

"Don't cum," Shining interjected. He tightened his grip around Twilight's neck even further, cutting off a tiny bit of her air supply for the first time, and sending the hints of glimmering stars into the corner of her eyes. With his other hand, he reached down between Twilight's legs and began to rub her clit with his thumb, gathering up plenty of Twilight's dripping moisture and moving in small, gentle circles around, and sometimes over, Twilight's clit.

"PLEASE," Twilight begged. She shut her eyes tightly and began to breathe in short, tight bursts, sectioned off with each repetition of her brother's thumb circling around her love-button. "Shining, I can't hold it anymore, I'm gonna cum, please, please let me—"

Shining withdrew his thumb from his sister's clit and shoved it in her mouth. With his fingers firm around her neck, he made his sister lick her own girl-juice off.

"Cum for me," he said.

He leaned forward to kiss her, taken without question the same way she had kissed him.

Twilight's eyes shut. Her head spun. Her brother's tongue danced in her mouth like a wily serpent, and his cock pistoned in and out of her pussy so rapidly it continued to shake the bed, and bounce Twilight's plump ass over and over up and down on the cushioned mattress. She could barely breathe. But still she found the strength to utter the words into her big brother's mouth.

I'm cumming for you, Shining.

At least, that was what it mostly sounded like. It was hard to tell, being so muffled.

Shining didn't wait for his sister to ride down the throes of her orgasm before relaxing his grip on her throat. No matter how enthusiastic she was, overdoing it on a first day of studies was a Twilight Sparkle tradition, and Shining Armor wanted no part in explaining to his wife why his sister had passed out on their bed the first night Shining had finally abandoned his internal sense of morality.

Twilight continued to buck wildly against her brother's hips, jerking back and forth on the bed and squeezing Shining Armor's cock like she was milking it with both hands. Twilight's pussy lips were damp and swollen, and her hips continued to shake when she finally stopped cumming, collapsing into a shuddering, post-orgasmic mess onto the bed again. Her legs no longer strong enough to stay up near her head, Twilight lowered them to the end of the bed, her feet dangling off, with purple-and-pink polish on her nails.

Shining was still hard, but he didn't move for a bit. Just watched his sister breathe, recover from the first of what might become a lifelong series of over-the-top sexual adventures. Although, she might also be thinking, if this was the intro course, what's next on the menu...

"Aren't you gonna cum too?" Twilight asked, panting between breaths. She leaned up from the bed, her pussy still squeezing her brother's cock, and looked at him with a playful expression, her tongue sticking out the corner of her smiling mouth. "Don't you wanna shoot a big load in your little sister's pussy?"

"You know I do," Shining Armor said. "But I think you should take this one on your face instead. Finish me off with your mouth and get a nice warm facial to end your lesson."

"Aw, no way! I think I should be allowed to choose where you cum, after all that... I mean, um, Sir."

Shining Armor pondered for a moment, never withdrawing his consistently-hard cock from his sister's quiver hole. Twilight even moaned a few times just from clenching around the size of him while she waited.

"How about this," he said. "If you can manage not to cum again before I do, you get to have a load in your pussy." Shining smirked at his sister. "But if you cum again before I do, I get to spray your face with jizz. Sound good?"

"Sounds good to me, Mr. Shining, Master Sir." Twilight giggled and reached down to spread her pussy even wider, giving her brother as much room as he could to squeeze his girthy shaft inside all the way to the bottom.

"Hey, don't get carried away with that." Shining Armor reached up to grab one of his sister's gargantuan tits, which had until now remained without attention, bobbing up and down on her chest with every thrust of his cock. The two melons were luscious, like ripe fruits, and Shining Armor almost wanted to stop thrusting and give all his attention to licking and sucking at his sister's boobs. But there was still the whole main course, and a bet was a bet, even if was with a sassy little sister training to be your sex-pet.

Still... it didn't seem Shining would have to work very hard at this one.

The second he'd started fondling his sister's tits, that is to say, squeezing them and kneading them and twisting and pinching her nipples between his fingers, and alternating from breast to breast to make sure neither side felt left out... well, throughout all that, Twilight had been moaning just as loud as when she'd cum last time, maybe now just because something inside her was unlocked and she'd accessed a higher tier of pleasure all together. There was no need for her brother's hand on her throat, because her brother was touching her, just touching her, and his big, meaty cock was still slamming in and out of her cute little pussy, grabbing him tight each time like a vice.

But, it was a clear indicator—Twilight Sparkle was close already. And she was no good at hiding it.

For one thing, she started to swear under her breath. It seemed like a new mantra, but maybe it had just been buried in the overwhelming number of new sensations before, and was now finally bubbling to the surface like a customary battle-cry. "Fuck," she said, murmuring it to herself, though it was more than loud enough for Shining to hear, and to consider a reward for his efforts each time he thrust a little harder into his sister's pussy. "Fuck," she said as her brother slammed himself in again, rocking her hips with the force of the impact. "Fuck. Fuck. Fuck."

"Don't tell me you're getting close already," Shining teased, joining his verbal poke with a few of his fingers to both of Twilight's nipples, giving her breast's double attention and eliciting a long, close-sounding moan from Twilight.

"Fuck... Yes... I am, I don't want to, but I am..." Twilight strained to keep herself still with her brother's thrusts, but couldn't help her hips regardless, rocking up each time, her breasts bouncing under her brother's hands.

"You don't need my permission this time. You can cum whenever you want."

As though it was a signal, Twilight wrapped her legs around her brother's waist and clenched down hard on his cock. Her pussy gushed girl-cum as her body began to rock and seize in frantic spasms, cradling her brother's shaft over and over again as she slammed together with him in a desperate rhythm.

"Fuuuuck," Twilight said. She rolled her head back and moaned so loud it reverberated through the walls, luckily finding no one else in the house to alarm. "Fuck, Shining, I'm cuuummiiing..." She drawled the last word out long and slow, as it seemed to signal the final stage of her release, her pussy giving one last squeeze to her brother's cock and then finally releasing it, or at least relaxing around it, as Shining remained all eight-inches deep inside for the time being.

When Twilight had caught her breath from another overwhelming orgasm, she looked up to find her brother smirking at her.

"That means I get to cover your face," Shining said. "Come finish me off with that filthy mouth of yours."

"Next time I want it in my pussy," Twilight insisted as she sat up on the bed, then laid forward to put her face right next to her brother's pussy-juice covered hard-on. She sucked the tip into her mouth immediately and ran her tongue along the underside of her brother's cock-head, hearing him moan and taking it to be a good sign. Next, it was now somehow easy to plunge forward and take all eight inches of her brother's shaft down her throat, swirling her tongue around and occasionally licking his balls without so much as gagging.

Shining, it seemed, liked this maneuver a lot, and groaned extra loud when Twilight would nuzzle her nose into the base of his cock and fondle his balls with her free hand.

"That's a good girl. If you keep doing that, you're gonna get sticky in no time."

Mhmm, mm-mmm! Twilight moaned incoherently with her mouth still around half of her brother's cock, and didn't bother to correct herself with anything comprehensible. She just went back to slurping and slobbering on her brother's erect penis, licking up the sides and cradling it with her hand whenever her mouth wasn't there, like a gentle creature that she refused to let out of her sight.

It only took a few minutes of Twilight's amateurish but enthusiastic bobbing and sucking to bring Shining to his limit. He'd been technically near his limit for a long time, but needed to renegotiate exactly what that limit was at some point soon.

"Close," he said simply, placing his hand in Twilight's hair and pulling her gently backwards as secondary signal. "Get your face ready."

Twilight moaned and sorrowfully withdrew her mouth from her brother's cock, but immediately switched to the perfect facial position, eyes wide, mouth open, tongue hanging out like she was desperate to catch and swallow as much of the impending load as possible. Twilight even managed to sneak in a cheeky, naughty smile and wink before opening her mouth again, and rubbing her own nipples with both hands, hips bucking and body shuddering as she waited for her brother to jerk his cum onto her face.

"Here it comes," Shining said, and with a grunt, unleashed the stored up result of five days repressed incest fantasies in cum form—that is to say, a lot of cum—all over Twilight's face. Twilight did her best to catch it with an expertly air, but failed after the second shot landed in a brilliant white streak across her forehead and hair, and instead settled just for catching any amount she could, and keeping her face in one place so Shining could aim better as he stroked the whole load out of his shaft.

With each shot, Shining gave another grunt, and soon Twilight's face was dripping from top to bottom in sticky white liquid. It dribbled down from her forehead over her eyes, which she'd closed quickly, and all over her cheeks and lips and chin as well... some had dribbled down by now to her tits, where it was pooling between them, and some had gone above her hair and landed on the bedspread, which was already more than in need of a wash from Twilight's constant dripping and squirting...

Shining rang out the last dribble of cum onto Twilight's perky, bulging tits, and she giggled as the tiny trickle joined the rest of the puddle.

"Good girl," Shining said breathlessly, before collapsing on the bed next to Twilight. "Scene over. Let's take a breather."

"Okay," Twilight said. She spun around and hugged her brother, unperturbed by the load of sticky cum dribbling down her face, and apparently not bothering her brother either, who hugged her back, though he wiped off his face and hands on a nearby blanket afterwards.

"But I wanna go again soon," Twilight said. "I didn't want this long just to fuck you once and then call it a day."

"We've got all the rest of Arbitrary Quarantine Week though," Shining Armor said, gesturing to a conveniently place calendar with the date marked on it in red pen. "Just two more days of you and me, free to fuck and frolic however we want. That's all before Cadance comes back. So even if we don't fuck a ton more today—"

"We'd better!"

"—we still should be fine."

Shining looked at his sister with a wide, brimming grin that caused his eyes to narrow.

"Really. What could possibly go wrong?"

Bam. The front door. Opening. And the jangle of the only other set of keys.

"You-hoo, Shining, honey, I'm home early... did you miss me?"

Author's Notes:

1: Like a Metapod - Ed.

2: Maybe in this universe humans can go in heat I don't know - Ed.