Hot Coffee Quickies: Substitute Sister

by Fabulosity

Rating: mature
Tags: Profanity, Sonata Dusk, Human, Twilight Sparkle, Fetish, Romance, Shining Armor, Equestria Girls, Porn, Sex
Length: 5086

Once again Sonata finds herself at the sexual mercy of her long-time running boy-toy and lover, Shining Armor. Twilight also decides to confront her brother in regards to his latest actions, but things don't got according to plan.

Once again Sonata finds herself at the sexual mercy of her long-time running boy-toy and lover, Shining Armor. Using him to further her long-term goal and to naturally extract any negative or sexual energy. As both enjoy each others company.

It doesn't take long until Twilight Sparkle catches onto her brothers 'winning streak' and decides to confront him regarding this. Feeling that he is betraying his fianceé and that his actions should be dealt with. Deciding to face her older brother, matters take a sudden change.

Note: Contains Sex, Incest.

Published 2019-04-09 20:30:01 UTC
Last updated 2019-04-10 17:03:41 UTC

HCQ: Substitute Sister

"Rrrrrrrgh! Take it slut!"

Not exactly the sort of words that Shining Armor would normally use at home, but today was a special occasion. With his parents out for the weekend and Twilight at a study session for the next few hours, he had little else to do at home besides prep for college exams and do some private tutoring for Crystal Prep students. Of course, Sonata wasn't exactly as dim as her bubbly demeanor suggested, but the girl certainly needed plenty of help.

Yet the books were in her backpack, they hadn't even compared notes, and the conversation had gone right up to the bedroom when she'd gotten here. Shining Armor's room was far messier than it'd be even in the worst of times with a knocked over chair, the sheets tussled, and a general scene of disarray, and it was only going to get worse with Sonata present. Piles of clothing scattered along the floor, leaving Shining in only his Crystal Prep purple tie, while Sonata was down to her miniskirt, knee-high socks, and a smile as he had her youthful frame laying back on the weight-lifting bench he had in his room, her legs spread lewdly wide as he was atop her pumping furiously away.

They'd been at it awhile too with two used condom packets on the ground, one empty used sheath clinging to Sonata's stomach after she'd sucked its contents clean, and the last one currently keeping things relatively 'safe' as he pummeled away at her this second round. Even as the metal parts of the bench rattled and shuddered at his efforts, along with the furious SLAP-SLAP-SLAP pace he set, it was clear by his straining features and erratic pacing that he'd pop any second now.

"A-almost... let's make it a porn finish!", no doubt clearly loving to try new things now, especially now that he was visiting Celestia with more regularity than before.

Of course Sonata wasn't going to turn up such attention from the schools alumnus. He asked her to come around and thus she did. Having already been here for a few hours, the pretty girl and handsome boy were already mating like rabbits. A casual mess had turned into complete chaos within his room. Yet the siren heard the male's words and groaned heavily. Sonata was barely able to contain herself, the pleasure was just that good. "A porn finish!? Aaah! Sounds good to me!", Sonata agreed.

Reaching down with both hands, using them to keep her legs suspended and pulled back and wide. Allowing him to mate with her fucking hole with much ease and yet she could feel that thick mass, beat into her over and over and over again. Pushing apart her insides and squeezing her flesh with such little effort. Yet she couldn't do a thing against him, not that she wanted too. Her tongue lolling out, flapping around as she'd on occasion, roll her eyes into her skull from the dicking she was in receipt of. However one thing was amiss right now. It seemed Twilight had finished her studies that little bit earlier than expected and right now, she was making her way toward Shining's room. Wanting to investigate the noises that were coming within.

Twilight had been feeling strange lately. Feeling hazy and often having adult thoughts, that were swirling around in her head all day. Little did she know, Sonata's magic was wooing her. Spending more time around the prep student, seeing as she knew that Twilight was Shining's younger sister. Thus using her magic to play with the girls mind and body. It would only be a matter of time now.

Now the eighteen year old college girl, was spread so very welcoming and lewdly for him, it only took a few final violent slams into her clenching, sopping-wet cunt before he growled out and yanked that twitching cock free. Practically tearing the thin latex sheath away and tossing it aside, hardly even noticing the door starting to creak open since he'd not bothered to lock it.

Certainly Sonata would have a lovely view, if she could see straight anyway, of the older boy's pulsating fuck stick thrust up towards her as he circled around, hovering over her panting, moaning features. Practically yanking her hands down to hold, jerk at it as he climaxed with a heavy groan, each heavy pulse ejecting gooey loads of thick goo out onto her blushed, fucked-stupid features, messily splattering all over her face, her two-toned hair, and upon her heaving tits, drenching the girl in that mass of spunk. Of course, anyone from the door might have an entirely different view.

Sonata felt that cock pop free from her pleasurable little fuck slot. Turning her head as she followed him, moving around toward her face. "A-Aaaah! So... so naughty!" The late teen chuckled as she closed her eyes and felt that eruption upon her features. Right at this moment, Sonata was merely being used as live body for target practice. A field for that semen bombing run. Splatter after splatter of warm, thick ooze plastered over her entire form. Face, hair, breasts and neck. Even more places too.

As Shining released himself, again. All over the pretty siren, Sonata merely reached down and began rubbing the fresh protein cream into her skin, as she'd close her legs over slightly and allow herself to get more comfortable as Shining did what he did. However this didn't stop Twilight from opening the door and thus getting a nice, disgustingly sexual view of what was happening right now.

The girl stared onwards through those thick black frames and observed the sight before herself. "S-Shining?!" Twilight called out, the fellow eighteen year old practically speechless after calling his name. Sonata giggled and turned her head, looking toward her classmate.

"Oh, heya Twilight! Don't mind us, we're just having some fun!" She'd giggle.

"T-twilight?!", it took a moment to register in his thoughts of course, considering this was the last place he expected her to be right now. It was still light outside, and the girl was usually stuck at the library until at least dusk! Blushed, panting, and sweating up a mess, he was only starting to figure out this was the worst time to be caught with Sonata's freshly-jizzed figure on display, instinctively moving in closer to try and hide his still-erect cock, even if that only pushed that spunk-dripping organ even closer to Sonata's smirking features.

"Get out! Let me... get dressed!"

Twilight was still stunned. The girl merely stood there, in the doorway with her mouth hanging nearly off it's hinges. Clearly she was in sort of shock, but with how Sonata's magic had been affecting her; she didn't want to look away and Sonata knew she'd want to watch onwards. Even as Shining shouted and spoke, Sonata thought she'd be extra naughty and lean her head at an angle that would allow her to gobble that cock between her lips.

"Mmmn!" Suckling firmly upon his head, cleaning him off and allowing those eyes to look back upon Twilight's position. The siren wanted to see it all, being extra naughty in-front of her classmate; further sexing her big brother. The younger sibling panicked slightly and turned her head.

"A-Aaah! Shining... I-I need to talk with you about this! Sonata... you... you need to leave right now, okay?!"

"Shit...!"

Shining Armor hissed softly as he felt a warm, welcoming mouth wrapping around his fat pole, suckling and slurping like the expert cock-milker that she was. There was even a moment he'd shudder and tense up like he'd just taken a hit of a drug, letting her bob her head a few times to taste the salty release he'd just shot all over her body and face, but he had the presence of mind to grab her shoulders and firmly pull her away from that dick she'd become so addicted to.

"Not now...!", whispering urgently down at her as he picked up her clothes off the ground and helped her to her wobbly feet.

With her clothes bundled up in her arms, certainly stained by hugging them against her sperm-stained breasts, Sonata was out the door a few moments later. Not that she couldn't hear them both talking though.

"Twilight... why are you home so early?"

Shining asked, though even as he said it, he knew it wasn't a great excuse as he sat there on the bed, using a pillow to cover his loins at least as he panted to catch his breath, the room practically stinking of sex.

"Oh! I guess I'm going! Okay i'll se-"

Sonata didn't even have time to finish before she was thrust out the door. Now that the siren was gone, it was just Twilight and Shining in the room. After Shining had spoke out and asked what was up, the younger sibling of the two merely froze and stared at the floor as her hands fell down her front and grasped at her front.

Sonata listened at the door, smirking as she readied her clothes. She knew what was going to happen and thus her mission was a success. She'd reap the benefits of this later, for now, she needed to go home before her sisters asked about her being late. Twilight slowly peeked her head up and then grunted at her brother, before spitting out words.

"What are you d-doing Shining?! You're cheating on Cadence! And... y-you're fucking my friends too?" Twilight pushed away from the door and got right up to her brother, pointing a finger in his face. "Should I tell our parents? Cadence too!? She'll hate you forever you know!"

Shining Armor was far from perfect, though he certainly tried his best to be a role model for Twilight. And most of the time when he knew he'd made a mistake, he'd be genuinely apologetic, owning up to such errors. There'd be no such consolation here however, his features twisted in anger and frustration at her accusing words and finger.

"Hey, it's none of your business! Or anyone else's! And I didn't know Sonata was your friend either, she wanted it first.", his tone strained, as if barely able to keep his own temper under control.

"It's nothing like Cadence, it just... feels good! Great even! Maybe you'd understand that if you weren't stuck in a book all the time.", though judging by some of the trashy manga he'd seen her reading, the girl at least had some idea of what men and women did.

As Shining finished those words, Twilight took a step back - seemingly injured by those very sentences. But her body was yearning for such attention and she wasn't going to leave empty handed, not this time. The girl had worked on her confidence thanks to her new friends, and despite being in Canterlot High school now; she had really improved. Removing her pointing finger, she'd shake her head.

"M-My head isn't always stuck in books!", Twilight reacted. "Infact... I know what males and females do and I want to try it too!" Twilight further stated and narrowed her eyes toward him. "I want you to show me Shining! A-And if you don't I'll tell everyone about what you're doing and I don't think Crystal Prep Academy will want to keep you around, when they find out you're just a big jerk and a pervert! Especially since Cadence is the principle now!" The younger girl moved forward, standing right in-front of her brother and inching her knee closer and closer, up between his thighs.

Now that took Shining Armor off guard completely. He would have been less surprised if Twilight had told him that she was a magical pony princess from another land. The anger melted away almost completely as confusion reigned, his expression dumbfounded and the pillow dropping a fraction of an inch, enough so that Twilight could have an even better look at that pulsing organ that remained somehow still hard. Was she... blackmailing him? To have sex?

"Wait... what?", though he scooted back a bit on the bed when she moved closer, somehow suddenly anxious. "You wouldn't... it was just.... ergh.", growling lowly in frustration, glaring slightly as he leaned back and let the pillow fall aside. "Fine. Just keep your mouth shut about this then. What... do you what to know?"

Things were complicated right now. Twilight didn't know what she wanted to do. Sure, she had read things and seen things; but she wasn't sure how to engage with her brother in this very situation. Her blackmailing threats had worked, though she was sure he would have helped her if she simply asked; but she couldn't take the risk. Twilight watched as he moved back and furthermore onto the bed, tossing away his cushion too. Now her eyes focused on his semi-erect length and she'd release a gentle sigh.

"Okay... listen... I just want you to show me a good time okay? I just want... to feel what girls feel... I'm already over eighteen and I know I'm missing out.", the poor girl was honest at-least. With that she begin to remove her own garments, casting them aside one by one until she was standing naked before her brother. Removing those thick framed glasses and placing them aside, she'd sigh and stand before him. Looking much like her Equestrian counterpart. "Now... wh-what do I do first?"

Things were beginning to get interesting. He'd seen how much happier Twilight was with her new friends at CHS compared to Crystal Prep, but hadn't thought too much of it until lately. Fluttershy was surprisingly curvy in that sundress, and Rarity had plenty to offer with her fashion styles. Pinkie had hefty tits for a late teen, no doubt where all those sweets went off to, and even Applejack and Rainbow Dash had their own athletic charms.

He'd never considered Twilight in such a way until recently perhaps, and as he watched her undress, realized just how much there was to grip of her hips, her breasts perky beneath that simple cotton bra, all of which was of a fine young woman. Enough so that his semi-hard erection went right to rock-hard by the time she'd stepped out of those simple panties, swallowing anxiously as he leaned back a bit.

"W-well... you're off to a good start I suppose. Let's start slow... so you can sit down and join me here, or just lay back and I'll... uh, do the rest?"

Naturally the late teenager felt strange. She was naked and thus vulnerable, right in-front of her big brother too. Goodness, did he look the sight right now. Chewing her lip, she'd whimper and nod her head when he spoke out to her like that. "Y-Yeah, okay... I'll just do that... I can learn a lot by just observing.", Twilight spoke. Moving forward, she'd crawl onto the bed and slowly make her way up the sheets until she was at her brothers side. When she'd reach this position, she'd roll over and onto her back and smile.

"Okay... like this? On my back, right?", Twilight asked and remained still, staring up toward the ceiling as she'd exhale and inhale slow and deep. Trying to keep herself calm. "Big brother... can you be gentle? Because... you'll probably destroy me otherwise.", she said as she'd avert her eyes.

"It's okay Twilie, I promise I won't do... well, that.", Aware that she'd at least seen if not heard part of him practically wrecking Sonata, and the condom packets on the floor were also evidence of his appetite. Breathing slowly and heavily, it was certainly difficult to restrain himself in this manner, not unlike how his first time with Cadence had been. But as he found himself crawling atop Twilight's welcoming, bared figure, he couldn't help but inhale her fragrance, watch her blush and squirm at the impending sensations.

"Just close your eyes if you need to... let me know how this feels.", he whispered now before planting a soft, affectionate peck atop her lips. Hardly the only one however, as soon his mouth began to trail a string of kisses, nuzzles against her cheek, neck and shoulder, one hand coming to rest atop her bare stomach lightly while the other cupped a perky handful of her tit, gently squeezing and kneading now as he explored his own sister's body. "So... no experience at all here?"

Twilight was pleased to hear that her brother would take things easy with her. She was honestly worried that he would destroy her, for the sake of making his point. But when he reassured her, she'd nod her head. "O-Okay, sure...", Twilight sighed with a deep shiver. As the cute teen lay there upon the bed, she felt that much more towering and bulky figure climb over her and immediately she'd exhale, gasp in a virgin's touch.

"A-Aaaah! I can feel the heat from your body... Shining!" It was all a new experience for her. In this regard she had some experience with her female friends, but nothing like this. Thus she'd answer his question when he asked. "Oh... I never... really done anything like this." Shivering when he grabbed her breast. "My friends... maybe grope me here and there... but... nothing like this."

Twilight closed her eyes and coo'd outward, feeling the sensations that her big brother were bestowing upon her at this very moment. Those trailing kisses and gentle brushes of his lips, making her twitch and squirm; like she was being examined.

"Heh... do they now? Why, just to play with you? Compare breast sizes even?", figuring a bit of conversation might keep her mind off the awkwardness of this moment as he toyed with her body further, feeling her starting to relax in some ways at least. "Though I didn't think you'd grown this much since... well I guess I haven't seen you naked in awhile.", not since she was a baby even.

But now one mouth closed around one of her taut cute nipples, suckling and licking at the bud gently while his hand rolled and squeezed the other heaving mound. The palm sliding down over her belly, and down to cup her feminine sex before working a slow, massaging rhythm into her nethers, his lips popping off from around her tit to speak.

"You're starting to get awfully warm too... how's this feeling?"

Those hands caressed her body and thus she could feel her brother exploring her supple, soft teenage body. Light gasps escaped her lips and she'd mumble lightly, closing her eyes over and more-or-less enjoying her brothers working form. The heat coming from him was amazing, he felt so good. Those hands exploring her body, touching her in places; made her quiver to the very touch.

"A-Aaah... yes... Shining... your fingers are making me feel really good... I can feel my tummy heating up." Twilight simply stated, and indeed her sex was starting to moisten to her brothers naughty touch. "Keep... doing that... please... feels really good...", she'd mumble a second time. Seemingly the girl would probably fall asleep if he kept this up.

Shining Armor licked his lips anxiously, feeling his own body reacting unexpectedly to the feel of Twilight's flesh in his hands, the way she moaned and whined as he toyed with her. He knew he should do this a little longer, make sure she was nice and warmed up before grabbing another condom packet, or at least eating her out to make sure she'd climax nice and hard before they were done.

But considering how things had been lately since he'd first met Sonata, he wasn't exactly thinking straight anymore. Not even realizing it at first until he was crawling atop her, his powerful frame looming over her svelte figure to more hungrily kiss at her neck and shoulder as now she'd feel that thick, pulsing organ mashed up against her belly, only to slide down until she'd feel the veiny length sliding right up against her warm slick nether lips. "Twilight... mmm... just relax. I'll make you feel really good..."

With a simple nod of her head, Twilight acknowledged what he had just said. She wanted to feel good afterall and when he pushed his form atop of her own, she'd shiver as the heat brushed onto her own. "Mmmmn..." His hands, those lips kept poking and fondling around with her skin and teasing her; essentially she was starting to get really aroused by his foreplay.

Then when she felt his cock push down, squish against him, her and rest against the flat of her tummy; she'd whimper and gasp deeply when she felt something poking against the moist, warm folds of her tight teenage sex. "S-Shining... I can feel you... so close to me right nooooooow..."

This was it. No turning back now, though maybe he should have thought about that before he'd gotten so lustful with his own sister, along with Celestia. Wasn't this the sort of thing a lot of guys dreamed about? He could certainly see why, and despite seeing her blushed features smiling weakly back at him in a way he'd never expected to see from his sister, he was far from dissuaded.

"I feel you too Twilie... mmf... never thought it'd feel like this with you. Now... I'm gonna put it inside, okay?", sounding a bit more nervous than he expected, as though this were his first time as well. Kissing her once more with a soft groan as that fat rod split her silken nethers apart, trembling with excitement as he felt her bare, slick folds engulfing that veiny shaft, tensing even more as he plunged in slowly.

Watching her closely, intently for her reaction as he proceeded cautiously as he could on sinking balls-deep into his own kid sister's deflowered cunny, exhaling deeply with a groan.

Twilight remained upon her back, feeling her brother getting closer and closer. Listening to his words, she'd squirm lightly to his very touches. Even as she'd feel his kiss upon her velvet skin, the girl stared upward toward him and felt that cock pushing against her silken nethers. "Oooh! Yes... I can feel it... I can feel your penis, Shining!" Twilight chirped up. As Shining pushed furthermore into her sex, slowly and inch by inch; she'd gasp lightly and slowly arch her back as he advanced.

"O-Oooooaah... oh my goodness... this feeling...!" The inexperienced teen squirmed, whimpering and draping an arm over her face as she continued to endure her brothers accessory.

Her wrists would be seized, carefully yet firmly, pulled aside to pin them alongside her splayed out violet hair so that he could see every moment of her adorable, moaning features as she experienced what it was like to be a woman now. Unable to hold back a throaty growl now as he felt her newly broken-in sex clenching and tightening in spasms around his invading member, though even then, he'd begin working slow, yet deep thrusts into that silken tightness, huffing and grunting as he fought back the burgeoning excitement that came from this experience.

An affair with a barely legal teen was one another, so was being sex buddies with a school administrator, but this took the cake for taboo acts. Pressing another hungry kiss to the side of her neck as involuntarily the pace picked up, the bed starting to rock as he worked faster into her slick feminine cleft, trying his best to observe just how she was handling it all the while.

"Ooooooah... it's still going inside!" Twilight announced, yet she didn't move an inch; despite the twisting and squirming she were doing currently. As her wrists, hands were taken and held out aside of her body. Matching the fanning of her hair, she'd feel the warmth in her cheeks fairly increase as her beloved big brother, mated with her teenage sex.

As her brother pinned a kiss against her neck, leaving saliva and marking her; she'd squeal out playfully and arch her back upwards once more. "Ooh! T-This feels amazing... if I had know... it felt like this sooner... I wouldn't have done so many studies, hnnnaaah!"

"Mmm... you could always study at home more...", he found himself suggesting even before thinking it, thrilled at the way she seemed to be loving every moment now and escalating in response, grunting and huffing with his increasingly zealous pumps. Her wrists released as he clung tighter to her smaller, writhing frame, feeling her legs clamping around his hips as he pummeled away at her slick teenage snatch, balls slapping louder, wetly against her.

"I could teach you even more.... mmm... just our secret...", practically growling into her ear, the idea being enough to get him shuddering, bucking as his release seemed to sneak up on him unexpectedly. "F-fuck...! Twilight, I'm almost...!"

They were getting more intimate and that was a good thing. Those moments of shyness between the two, vanishing as they mated with one another. A hot and heated moment between older brother and younger sister. As Shining said those things, it was making the egg-head think things over, processing the information as well as enjoying the pleasure that came with.

"Y-Yes... I think I'd like that, Shiny... uuuaagh... this feels so good... I could really do with learning more... y-you know what they say... practical science is the best science!" Twilight released a nerdy little giggle and then grunted loudly as she dug her thighs against his hips and squeaked.

"I-I'm so wet... and warm... and you're going to cum right? You're wearing protection, yes?" The girl panted, tongue lolling on occasion.

He didn't answer that directly, hissing through gritted teeth as the wet, lewd sounds of their love-making intensified until he was giving it to her almost as hard as he'd been going with Sonata, more than a bit impressed that she wasn't at all uncomfortable with that. "D-don't worry... I'll pull out!", still not so carried away with lust that he was going to simply nut inside his sister, that'd be bound to create all sorts of awkwardness later. But it was hard to deny the temptation as he felt her body clinging to him, demanding his release even as her mouth keep moving with the thoughts filling her head, the pace and rhythm of his thrusts growing even more erratic now as she'd feel that telltale heavy throb within her loins.

"Aaahhhh... Twilight, I'm cumming...!"

"N-Nooooooo... just be careful... don't cum inside me, Shiny!"

Twilight yelled out in response. Feeling her brothers continued efforts, as he was getting worked up and thrusting in and out of her sex. Her velvet walls squeezing around his length, milking him and adding great heights of physical pleasure until the point of explosion. As Shining announced his impending orgasm, she'd squeal out and arch her back. While she was worried about what was about to happen, she too, was on the verge of experiencing her first womanly orgasm; brought about by a thick, hard cock within her velvet love canal.

"S-Shining... I'm gonna... cum... toooooooo!" The cute little bookworm dug her fingers into the sheets of her brothers bed, squealing out loudly as she'd feel the edge approaching.

There was a heavy, sharp grunt as his hips shuddered and rather than stop and pull free like he'd told her, that veiny mast stayed buried hilt-deep in her snug, clenching sex right where it was as that heavy pulsating now intensified.

"Can't...hold...rrrrrrrrRRRRGhhhh!", finally going with that final temptation as he held her close, grinding and bucking against her body as she'd feel that molten explosion of seed erupting into her sex, squirting and filling her with her brother's thick spunk that she'd seen him painting Sonata with only minutes ago.

Features twisted in bliss as he continued to ride that climax for what seemed like an eternity, ignoring everything else but the way she felt, sounded to him, at the moment too caught up in the blissful sensation to be ashamed of cumming inside his own sister.

The moment that Shining injected his love inside of her, the bookworm panicked for a second; before she released her own torrent of womanly juices against her brother, as they mated together. Her mind was foggy and she'd squeal out in sheer bliss, that cunt-shattering orgasm seemingly riding on for the longest time.

"Aaaaaaah! Cummmmmmmmming!", Twilight squealed out in-between pants, whimpering and shivering as her orgasm quickly blew over and she'd remain still and lifeless underneath her big brother. "Y-You... came inside me... I can feel the heat... so much... I'm going to get... p-pregnant...", the poor girl whimpered quietly.

"S-sorry...", panting, huffing as his hips spasmodically thrust into her a few more times, making sure it wasn't a mere 'accident' as he finished pumping the last spurts of his baby batter into her welcoming womb, but left her trembling, fighting for breath as well as he finally withdrew and rolled over. Unable to help but watch as his seed messily began to leak, drip from her freshly-fucked cunt, inwardly proud of his handiwork while watching her observe this mess overflowing from her loins.

"It just felt too good... and don't worry, we can keep that from happening later...", a hand cupping her dripping-wet nethers, lightly stirring and caressing her deflowered slit as he laid there close by with a warm smile. "Felt wonderful though, didn't it?"

"Oh no... I can't believe you actually did that, Shining..." Twilight released a deep sigh and whimpered as she lay there.

The poor girl didn't know what to do, but right now at this moment she was intoxicated with pleasure, that she really didn't care. Merely enjoying the afterglow of the wonderful sex her brother gave her. As he lay next to her, she'd feel his hand and fingers caressing her cunt and messing with the liquids dripping from there and she'd shiver lightly.

"Y-Yes... it did feel amazing... I won't lie. But... I think I want to sleep right now... just give me an hour and i'll be ready to go again. Still a little sleepy from my studies...", Twilight stated as she'd yawn and drape her arm over her face once again, exhaling deeply. It didn't take long for her to pass out however, drifting off into a slumber as she remained naked upon her brothers bed. When she'd awaken, who knows if they'd actually continue. That would be a sibling secret.