Twilight's Awkward Reagent Retention

by Clopficsinthecomments

Rating: mature
Tags: Twilight Sparkle, My Little Pony: Friendship is Magic, Romance, Porn, Princess Cadance, Fetish, Comedy, Starlight Glimmer, Shining Armor, Sex
Length: 15606

As a result of her studious research, Twilight Sparkle had discovered that the key ingredient in Zecora's memory potion was unicorn essence... and that essence had to be harvested from a family member! Now she just has to actually COLLECT it!

Twilight Sparkle and Starlight Glimmer did their homework, researching the strange and shadowy past of the unicorn memory spell that had saved Ponyville from the encroaching vines of the Everfree Forest. It was then that they discovered the well-kept secret of the extremely frequently used EUV, long thought to mean Equestrian-Universal-Volume augmenter... but which actually meant essentia unicornis virilem...

Unicorn Ejaculate.

Even crazier, Starswirl's potions had additional requirements built into them... requiring EUC to be collected by an alicorn... from a family member!

Follow along with Twilight as the family dinner she'd gone to suddenly becomes an opportunity to gather the critical ingredient that could end up saving Equestria... and see if she is able to resist the temptation to do her duty... and her brother.

She can't.

A submission for the April incest contest.

CONTAINS: Brother/sister incest , hoofjob , blowjob , vanilla , size difference , cum expansion

Published 2019-04-30 22:10:02 UTC
Last updated 2019-04-30 22:10:02 UTC

Awkward Discussions

It had been the family dinner from Tartarus.

Twilight was halfway through her main course, her mind finally distracted from the stress of the monumental task hanging over her head… having to find some way to harvest a family member’s… essence.

But she’d managed to forget all that worry, thanks to a lovely chat she was having with her beloved sister-in-law, Cadance. She’d even brightened up enough to begin joking with her close friend and pupil, Starlight, as the two of them picked on her father’s penchant for adding cheeses to every side-dish he ever prepared.

That’s when it had hit her… or more accurately, fondled her.

A warm tendril of magic had quickly made itself familiar with her most intimate parts, sliding and probing with a practiced intensity that made her own private fumblings seem amateurish by comparison.

Immediately Twilight had glanced up in shock, trying to see just who the culprit was… this was no playful goosing or accidental grope… the rhythmic, sensual explorations were deliberate, erotic, and oh so skillful.

Her eyes caught several horns alight with magical activity, not uncommon at a unicorn dinner table as bits of food flew from plate to mouth. Even more curious was that nopony seemed to be looking at her with any interest at all. Her brother was eagerly inspecting his beautiful wife. Starlight was hastily chewing a third bread roll. Night Light was shooting waggling eyebrows at Twilight’s mother as he finished telling the same joke he’d told every night for the past fifteen years…

...and then Twilight began to orgasm.

Investigating the source of the adroitly sensual magical masturbatory field quickly became a secondary goal to concealing her effusive reaction. She shut her eyes, bowed her head, closed her mouth… and did her best not to squeak.

She always squeaked…

The next few minutes were a blur of sensation, heart-pounding fear, a cacophony of sound and stimulation as the poor alicorn did her best to blend into the background and avoid wetting herself and letting out the soft scream that was bubbling up in her gut.

Somehow, she made it through those few minutes. Somehow.

Twilight’s face was grinding against the dinner table, she’d never thought that she was going to get so up close and personal with her mother’s tablecloth… but she had to do something to conceal the sweaty, blushing, grimacing, eye-rolling mess that was her face.

“Sweetie… are you feeling alright?” Twilight Velvet’s soft, concerned tones from the head of the table drifted over to the purple alicorn’s ears.

Not now mom! Twilight’s mind raced, as she clamped her legs together, riding out the last bits of her orgasm. “Mm...Mmmhmm….” She mumbled out into the table, a final convulsive shudder making her chair squeak. Why was there always squeaking!?

At least it helped cover up the sound of dripping juices falling from the edge of her chair.

“Are you sure?” Twilight Velvet stood up, beginning to gather the plates. “Is it your tummy again? I told Night Light to go easy on the cheese… He knows it gives you the toots.”

“M-mooomm….” Twilight groaned. As if the situation couldn’t get any more embarrassing.

“Oh, don’t worry, Mrs. Velvet, her friends and I know all about Twilight’s…’toots’!” Starlight tried to hold back her mirth but failed… her chuckles escaping her hoof-covered mouth.

Great, now I’ll never hear the end of ‘Twilight’s toots’... Twilight groused internally as she pulled herself up from the table. Her breaths came in raggedy huffs, her face was a rosy-pink of exertion. Cadance had left the table to trot off with Night Light into the living room, leaving only her brother sitting on the other end of the table.

Her brother, who was now staring at her with the fear of Celestia in his eyes… a grim, ashen-faced mask of terror, locked on her face with such intensity that it was clear who the culprit had been.

Twilight’s jaw set forward in anger, her brows pinching together accusatorily as she growled silently across the table at her older brother. It was YOU!

Twilight slammed her hoof on the table and began to stand up, ready to berate Shining for… whatever this horrible prank had been.

But he beat her to the punch, standing up so quickly his chair toppled over behind him. “T-t-twilight, can I talk to you alone, please?” His eyes were begging, pleading with her…

“Fine.” Twilight said, as coldly as possible, before leaving the table, making very sure to tuck in her chair so as not to reveal the puddle left behind… and tucking her tail in tightly to try to keep the scent of her arousal as contained as possible.

The two trotted off to the kitchen, leaving just Starlight and Velvet at the dinner table.

“I wonder what THAT was about.” Starlight questioned, looking over at the departing siblings.

“Oh, those two are always getting all mixed up together… always have, always will.” Velvet sighed, pouring another generous helping of red wine into her glass.

“Twilight, I-I am so sorry.” Shining looked like he was about to throw up from anxiety.

“Just what the bucking HAY were you doing?” Twilight hissed through her teeth.

“I thought you were Cadance!” Shining rushed out as quickly as he could.

“What!?” Twilight half-snarled, prodding her brother’s big chest with a hoof. “And-and… you just do… THAT to Cadance in the middle of a family dinner?”

“Well… I mean… sometimes, Cadance is pretty aggressive…” Shining was still mortified, the horror on his face easily apparent. “It gets us into messes like this all the time… well… not quite like this...”

“Just how could you not… tell!?” Twilight snarled.

“It was under the table! I’ve never been good at sensing where my field is if I can’t see it.”

“Still… didn’t you realize that something was… different?”

“I mean…” Shining rubbed a hoof through his mane. “I thought it was a little tighter to squeeze into, but honestly it all feels pretty similar down there.”

Twilight’s face flared up with a new wave of embarrassment. She didn’t want to think about her brother having any idea about what her… down there felt like! “G-gross! Stop thinking about what my… what it feels like!”

“You asked!” Shining stammered.

“Still!” Twilight snorted and threw her head back in frustration.

“Again, Twily… I’m so sorry. I never meant to do that. Are you… are you OK?”

“What do you mean?”

Shining swallowed quickly, his eyes flicking back and forth as he searched for the right words in this very delicate situation. “Uh… I didn’t… it wasn’t… bad or anything… was it?”

Twilight’s blush deepened a few shades… now firmly into burning, volcanic crimson territory. “N-no… it… didn’t feel... bad.”

“Ah…” Shining rubbed the back of his head, “So… it was… OK?”

“Just what exactly are you asking!?” Twilight huffed with frustration. “Yeah, I came, is that what you wanted to hear? Sheesh!”

Now it was Shining’s turn to turn red, which was much more visible with his white fur as background. “N-no!” His eyes wide with shock and discomfort at this new fact. “I didn’t need to know that! I just wanted to make sure I didn’t hurt you! Oh geez… I really didn’t need to know that.”

Twilight froze with even further embarrassment. She tried for a few moments to reboot her brain, to take her hoof from out of her mouth… but she failed. “This couldn’t get any worse…” She sagged in defeat, doing her best to study the floor between her hooves.

“H-hey Twily, chin up…” Shining forced out a little chuckle, “it absolutely could have been worse.” Shining put a wry grin on as he tried to cheer his little sister up. “At least I didn’t end up giving dad a magical prostate exam.”

“Pffft….” Twilight couldn’t help but chuckle, glad to let off a little bit of the tension and laugh with her BBBFF, like nothing had happened.

Shining sighed with relief, still inspecting his little sister closely… Twilight could tell that his joking was him attempting to ease the situation for her, to make everything all right… she knew that he was feeling just awful about what he’d done. He’d always been a great big brother, trying to make sure she was OK when she was in trouble or feeling down.

Twilight didn’t want him to feel awful. Not over some honest mistake.

“I really, really need to give you a remedial lesson on non-visual telekinetic positioning.” Twilight giggled, shooting the first smile in minutes at her brother. “There’s a fantastic lecture series by Maester Blind Bat on methodologies you can use if you are unable to see where your field is.”

Instantly she could see the tension melt from his face. He could see that she was OK, that he hadn’t permanently damaged or changed the relationship… Twilight felt something sink in the pit of her stomach as that thought flashed through her head: No, the pony who’s going to do that is ME.

“So, we can forget this whole horrible thing ever happened?” Shining chuckled slightly at his nerdy little sister, “I mean… I owe you one something huge - I’ll definitely make it up to you.”

“Oh, hay yes you will.” Twilight laughed. “I’m thinking you’ll pay for my amarezon.com book account for the next month.”

Shining’s mouth dropped open slightly as he mentally ran the calculations of just how many hundreds of bits his little sister’s reading habit could cost him. “R-really? A whole month? I did get you off… shouldn’t that buy me a little credit?”

“Shining!”

“Kidding! Just kidding sis!” Shining danced away from his sister’s playful swat as both laughed, all the awkwardness and tension dissipated.

For a moment, that was.

Twilight suddenly felt that pit in her stomach return. There was a monumental task in front of her. But she couldn’t reveal it to her brother, not yet… “Actually Shining… forget about the amarezon account… just… remember you owe me one… ok?”

Shining smiled and gave his sister a quick hug.

“Of course.”

“Also… I have to talk to Cadance.”

Shining pulled back from his sister to look her in the face, there was no way that he could miss the worry and concern that had returned. “About… this?”

Twilight sighed, “Y-yes… and some other things.”

Shining nodded solemnly. “No problem Twily, I don’t keep anything from her… she’ll tear my horn off for a bit then make fun of me for weeks… but I was going to tell her anyway… if you don’t mind - can you let me tell her first?”

Twilight nodded. “S-sure… if you don’t mind could you chat with her soon? I… I need to ask her for… permission… for something else.”

Shining raised a curious eyebrow, unsure what his little sister was scheming that could have her so tense. He ruffled her hair slightly before he turned away from her and started to head back toward the dining room, speaking back over his shoulder. “Whatever it is, Twily… don’t stress over it! Cadance is the most understanding pony in all Equestria. I’m sure she’ll say there’s no problem with whatever it is you need.”

Twilight stared at her departing big brother’s butt - Just why did it have to look so cute? - before mumbling under her breath.

“That’s what I’m afraid of."

After the pair returned to the dining room, they saw that the whole family was pitching in to quickly clear the table and get everything set away. Unicorn (and alicorn) magic made these things so much simpler. A few flashes of magic and the dinnerware was sparkling, stacked, and back in the cabinets.

Starlight and Twilight headed into the living room, though not before Twilight noticed her brother tap on his wife’s shoulder and ask her if he could have a moment with her in private. The two trotted up into Shining Armor’s old bedroom, still preserved by their parents after all these years - just like her own.

It was hard not to imagine how the conversation was going behind those doors. Was Cadance tearing into Shining Armor? Was she angry at Twilight? Twilight’s racing thoughts were interrupted by her friend Starlight, who poked her out of her spinning thoughts.

“Twilight?” Starlight asked with a cocked head, “Are you OK? You’ve been kind of… spaced out all evening.”

“Mmhm.” Twilight nodded, turning to face her friend.

“Are you stressing out about… uh… collecting from your brother?” Starlight wasn’t teasing her friend now, she could see that Twilight was nervous, and as much as Starlight Glimmer loved to be an impish troll, she cared deeply about her friends’ wellbeing.

“How could I not?” Twilight groaned, “...and you don’t even know what happened at dinner.”

“Well, it’s not like you have to worry about this right now... you can do it at some other time… wait until Shining and Cadance are back in the Crystal Empire and go to meet them there… wait… what happened at dinner?”

“Honey? Starlight?” Velvet, Twilight’s mother, interrupted from the doorway to the living area. “Sorry to interrupt you two, but Night Light and I are going to retire early… whenever he gets that cheese in him, he gets so… frisky.”

“Mom!” Twilight turned and stomped her hoof, her wings fluttering slightly in discomfort, “too much information!”

“Oh please!” Velvet chuckled, dismissing her daughter’s dismay with a dismissive hoof. “We’re all grown mares here. I just wanted to let you young kids know that the wine cellar and Nighty’s liquor cabinet are at your disposal.” Night Light strode past the older mare as she spoke, flicking her side with his tail and nipping at the unicorn’s ear, making her chuckle.

“Oh Nighty stop, you’re horrible.” Velvet giggled, swatting him playfully.

Night Light nuzzled his wife’s neck, growling playfully as he tried to hurry his wife toward the stairs. “C’mon my lovely Velvet lovebird… let’s go put that old bedframe out of its misery. I’m going to put your horn right through the headboard.”

“DAD!” Twilight’s hooves clapped to her ears, even as her wings slipped wider, “Way too much information!” Velvet and Night Light laughed as they retired to the staircase.

“See you in the morning, honey, Starlight!” Velvet called as they clopped up the stairs.

“Don’t open the door unless you hear screaming… actually, just don’t open the door!” Night Light chuckled, hip-checking his wife’s rump.

Starlight looked over to Twilight with a bemused grin. “Just what the hay is with your parents?”

“Gah, you have no idea what it was like growing up with those two.”

“Well, I can imagine.”

“No… no you really ca-”

“Twilight?” Cadance’s voice interrupted the two Ponyvillians, she and Shining had quietly glided into the living room. “Shining said that you had something important to ask me about?”

Twilight spun and faced the voice, the hackles on her back rising involuntarily. “Y-yes!” She squeaked out.

A comforting hoof rubbed the middle of her back, and Starlight’s friendly voice filled her left ear. “Don’t worry about it Twilight - Cadance will understand.”

Twilight nodded and rose to her hooves, walking over to her sister-in-law and former babysitter with a meek, unsure expression. She passed her guilty looking brother who shot her a smile and a supportive wink.

“Don’t look so stressed, Twily.” Shining ruffled his sister’s mane. “Cadance doesn’t bite, I promise… much!”

Cadance rolled her eyes and looked over at her husband with a stare. “Oh… ruffling her hair, that’s nice of you, sweetie… so I guess you do know where it is appropriate to touch your little sister, after all?”

Shining’s gulp was as loud as a sneeze. “Y-yes… C-cadie…”

Cadance extended a wing around her little sister-in-law, steering her away from her husband as she stuck her tongue out at him. “Honestly, making jokes already… you’re deep in the doghouse, buster.”

Shining Armor’s ears folded back, and he whimpered, tail tucked between his legs while he strode into the living room to slink next to Starlight Glimmer.

“C’mon Twilight,” Cadance smiled, “Let’s go have a quick girl chat, just you and me…” Cadance looked back over her shoulder and barked a command at her husband. “Shining! No ‘accidentally’ sexually assaulting Starlight Glimmer while I’m not monitoring you, understood!?”

Starlight cocked her head and raised an eyebrow in confusion… but still shuffled a foot away from the whimpering unicorn stallion in caution.

“C-cadie! Y-you know I d-”

“Don’t you ‘Cadie’ me! I mean it!” She pointed a hoof at her eyes then at Shining. “Starlight, watch out for this guy.” Cadance shot a wink at the purple unicorn. “C’mon, Twilight.”

The two trotted down Twilight’s familiar hallway, the door shutting softly behind them under the glow of Cadance’s skillful magic.

“First off, Cadance, I’m s-”

“Shh!” Cadance wrapped her sister-in-law with a deep hug, hushing her and stifling her before she could get started. “You don’t have anything to complain about Twilight, that was one hundred percent that big oaf’s fault.”

Twilight smiled shyly, a blush touching her cheeks, before she kicked at the floor.

Cadance was looking at her with a considered, knowing smile. “And Twilight… don’t beat yourself up about how much you liked it either…”

Twilight looked up at her with terror, wings snapping out in alarm. ’How did she know… how?

“I… I didn’t… I mean… I don’t-”

“Shh…” Cadance lifted a hoof to Twilight’s mouth, shushing her once again. “Twilight.” Cadance looked at her with earnest intensity and a knowing glance. “You know I’m the Princess of Love, right? That means all types of love. All of them.”

Twilight cocked her head slightly. “I… I still don’t…”

Cadance sighed and shook her head softly. “I know it’s something we haven’t ever really had occasion to discuss, well… at least since I’ve been old enough to completely step into my role.” She sat on Twilight’s bed and tapped the space next to her, inviting the younger alicorn to sit next to her.

“There’s all sorts of different love, Twilight.” Cadance grinned. “Familial love, parental love, friendly love, fantastical love… and erotic love.”

Twilight blushed, starting to take a breath and prepare a reply. But once again the alicorn cut her off.

“I want you to know that there’s nothing wrong with feeling that kind of erotic love with another consenting being. Nothing.” Cadance patted Twilight on the knee. “Even if it’s with your friends… or your brother.”

Twilight’s wings shot out in fear and she looked at the pink alicorn with the whites of her eyes as wide as saucers. “I don’t…. I would never… I don’t feel that way about Shining.”

Cadance simply softly smiled back at her, patient, understanding. She would let her silence accuse the younger alicorn of the lie she’d just told.

“I don’t.” Twilight repeated, hoping her words sounded more believable.

“Twilight. I just told you that I’m the princess of love. There’s no hiding any of this from me, don’t you understand?” Cadance seemed to radiate with pink warmth, belying her godly powers. “It’s laid bare to me like an open book.”

Twilight felt like her heart was going to explode out of her chest. Her fear and anxiety had just been rising minute after minute as the conversation had gone on. Now Cadance was accusing… no… confirming feelings that she’d buried deep down for so long. Her eyes raced toward the door and then to her window, the fight or flight instinct kicking in hard for the little lavender equine. She began to charge her horn to teleport away.

“Twilight. Stop.” Cadance scolded. “Talk to me.”

Like a fine wineglass clenched too tightly in a mare’s hooves, Twilight shattered into pieces.

With a desperate sob she buried her head in her hooves and began to spill things she’d never dared to speak aloud. “It-it’s true… I’m SO sorry. It’s not even really a big thing… just a little fantasy I had when I was a young filly… and then I never stomped it out and sometimes when I was lonely and I didn’t have any romance paperback novels and so sometimes I would imagine ShiningarmorandohmyCelestiaI’mgoing toTartarussssss…..” Twilight’s rattling confession quickly blurred into a single unending incoherent stream of excuses.

“Shh… shh… shh…” Cadance chuckled. “Don’t be such a silly filly Twilight. It’s perfectly normal, and far more common than you’d think. And like I said, there’s nothing wrong with it.”

“I’m fairly certain there are several laws against it, at the least.”

“Not in the Crystal Empire. Nor with any visiting diplomats from the Empire, which would include Shining… and at my pleasure, you as well.” Cadance chuckled. “Besides, those rules were only put in place because Celestia was getting tired of dealing with those noble houses that were inbreeding desperately to cling to power with no regard to love.” She rolled her eyes. “I don’t have to tell someone as intelligent as you about the low genetic risk…”

Twilight nodded. “But if you multiply it over a bunch of generations, over and over…”

“...aaand that’s how you get Prince Blueblood.” Cadance sighed.

“Ugh. That… makes sense, now that I think about it.” Twilight chuckled.

“Yeah, but those laws won’t be around much longer. Besides, since when could laws ever stop love?” Cadance chuckled, prodding Twilight.

Twilight’s brief chuckle faded. She began to slump again. “That’s not the only thing that should stop it though… there’s you, there’s Shining, there’s what everypony would think. I just want you to know that it was all just fantasy. I would never have acted upon it.”

Cadance laughed again and wrapped Twilight up in a big hug. “Oh silly, I wasn’t suggesting you should. I know you’re not comfortable with these things… yet.”

Twilight nodded.

“Well… I guess that’s not entirely accurate if Shining’s description of the puddle you left on your chair is to be believed.” Cadance waggled her eyebrows.

“Cadance!” Twilight squeaked, her face as pink as a Ponyville baker. “Please don’t remind me!”

“Tell me, I’m curious.” Cadance grinned evilly. “When you fantasize about him… just how large do you think he is?”

Twilight’s wings, already partially extended, throbbed to full width. “C-Cadance!”

“You know he’s gotten a lot bigger in most places since you were both young, right?” Cadance chuckled.

“Cadance! Gahhh!” Twilight tried to plug her ears with her hooves.

The pink alicorn couldn’t help but continue to tease her. “I mean, when your mom told me that if Shining had taken after your dad, I’d be in for a rough first night, I believed her… but WOW, talk about hauling a log between your legs.”

“LALALALALA I CAN’T HEAR YOU TALKING ABOUT MY BROTHER AND FATHER HAVING GIANT STALLIONHOODS LALALALA!” Twilight shouted out loud, her ears still plugged.

After she’d had her chuckle, Cadance reached forward and gingerly lifted the hooves from either side of Twilight’s ears.

“Just promise me that if you’re ever interested, you won’t let what other ponies think affect your decision.” Cadance paused as Twilight cocked her head at her with confusion. “That includes me. I don’t think you’d be surprised to hear that I can be a bit… adventurous. Especially when it comes to the ponies I love.”

Twilight could do little more than swallow under the predatory smile of the alicorn. “And… Shining Armor?”

“Oh… well,” Cadance chuckled as she stood up and stretched her neck, “I don’t want to spoil all the reveals in one evening, especially if you’re not comfortable with it… but let's just say there’s a reason I suggested that these sorts of feelings and fantasies are more common than you’d think. I can sense it in ponies near me… All. The. Time.”

The blood pounding through Twilight’s head made it feel like her ears were ringing… or on fire. Could bells burn? Her brain was filled with malfunctioning thoughts as she found it impossible to process what her sister-in-law had just implied. Her mouth worked up and down like a fish out of water as she struggled and failed to find words.

“Hee hee! Did I provide you with some good material for your next lonely night?” Cadance chuckled as she headed toward the door. “I promise not to tease you on this anymore tonight, you made it clear that you’re still uncomfortable with this… so don’t stress over it.” She flicked her tail playfully as she headed to the door back to the hallway and the living room.

Pausing as she put her hoof on the doorknob, she turned back to her still stunned sister. “Now I assume that was what you were so stressed out about, right? The whole misunderstanding at the table and your feelings?”

“I need Shining Armor’s cum.” Twilight blurted out. “Like, right now.”

“Huh?” Now it was Cadance’s turn to be stunned.

“You know… uh ejaculate, semen or the spermataz-”

“Baby batter, stud frosting, wild oats, colt cream, foal filling… Yes, Twilight I’m aware of the word, its definition and the vernacular.” Cadance groaned before slapping a hoof against her head. “The question I meant to ask, is why?”

“Science?” Twilight tried, herself still recovering from the exhaustion of having made her second massive confession related to her brother’s dangly bits in less than ten minutes.

“Uh uh Sister, that excuse isn’t going to fly.”

“No really! And the fate of Equestria could depend on it too.”

Cadance sighed again. “Details, please Twilight.”

Detail is something you should always be careful asking for from a stressed-out, anxious, nerdy, alicorn book horse.

Cadance suffered through an excruciatingly precise five minute lecture on Starswirl’s potion, how she and Starlight had discovered it, then found out that the key reagent was stallion semen, then even further that the critical potion in question required the semen to be harvested by an alicorn… from a member of her own family. Hence the predicament.

Twilight finished, flopping back on the bed with exhaustion.

Cadance grinned at the collapsed younger-alicorn, her whole aura glowing pink with anticipation at such an opportunity to get two of her most beloved ponies to express their love for one another in such a raw way…

She opened the door and nodded her head at the hallway. “C’mon Twilight… I think helping with this kind of thing is right along my area of expertise.”

Author's Note

This was a fun one to finish off! It was meant to be extremely light-hearted and fun.

Lots of jokes, lots of silliness, lots of characters acting at the 'limit' of their usual characterization.

Let me know what you thought! I don't always do comedy.

Collection Attempt #1

Twilight and Cadance trotted into the living room.

Looking up from what seemed like an intense, whisper-filled conversation Starlight and Shining noticed them immediately. As if he’d been struck by lightning, an extremely nervous Shining Armor sat bolt upright and had his eyes glued to his little sister. And on the coffee table in front of them… the ornate flagon that Twilight needed to fill at some point.

“hI tWiLigHt!” He croaked out awkwardly, followed by a nervous, choking cough.

Twilight looked over at Starlight as the gears clicked in her head. “You told him?”

Starlight shrugged awkwardly with a sheepish smile. “It sort of, just came up.”

“How does that just come up!?” Twilight groaned, pointing an accusatory hoof at her friend.

Starlight rubbed the back of her head. “I uh… well it’s sort of hard to not talk about…”

“NO, IT’S NOT!” Twilight shouted. “HERE I’LL SHOW YOU: HEY SHINING HOW ARE YOU? HOW WOULD YOU LIKE TO TALK ABOUT ANYTHING OTHER THAN THE FACT THAT YOUR SISTER NEEDS TO HARVEST YOUR EJACULATE?”

Starlight pointed at Twilight and cocked her head. “See? It pops right out, even if you’re trying!”

“Gah!” Twilight threw her head back with anger.

“Uhh… c-can I say something?” Shining asked plaintively, from the couch. “Are you sure you just can’t… y’know… give me the vial and let me take a short five minute-”

Cough. “Three minute.” Cadance blurted out from behind a hoof.

“...three-minute bathroom break? Then we can all just pretend this never happened and move on with our lives.” Shining suggested.

Twilight shook her head vigorously. “Unfortunately, no. I’ve done the background. It has to be a family member of an alicorn, by that alicorn. Starswirl’s rules were very precise.”

“He won’t know if we cheat! He’s dead!” Shining exclaimed.

“First off, it’s magic, honey. Magic always knows.” Cadance sighed. “Second… you met him last week! At the event with all the pillars, remember?”

“That old guy?” Shining scoffed. “No fogey is gonna force my sister to do THAT.... what if she just… uh… held the beaker?” Shining prodded the ornate flagon that sat on the coffee table.

“No, it's pretty explicit. I’ve gotta be the one to harvest it.” Twilight sat on the floor near the flagon, trying to keep some distance between herself and her brother, as if he were radioactive.

“W-what if you do it Cadance?” Shining stammered.

“Honey, as much as I appreciate your effort to get a quick hoofie from me, we’re not related.”

“No! I mean…” Shining hesitated, his ears pinning back slightly, “...you’re an Alicorn too, and there’s that great-uncle of yours in Baltimare, and -”

“Shining! He’s 95! Plus, you’d send your wife to do this instead of taking it on yourself!?”

“Cadance, this is my little sister! It’s Twily! Do you know how gross, how disgusting, how-”

Cadance’s frown had been growing larger and larger as Shining’s frenzied excuses droned on, until she’d had enough, and her horn began to glow, a magical aura throbbing outward from Shining’s chest.

“...how absolutely excited I am right now?” Shining’s tone of voice had shifted markedly from one of concern to barely contained mirth. “I mean… I’ve fantasized about Twily for years. Ever since I was a teenage colt. I used to get hard-ons just from giving her piggy-back rides, and then when she got older, she’d drive me crazy! I’ve probably dedicated at least a few barrel-loads of batter to her already with all the solo sessions I’ve had in this house alone!” The white unicorn laughed and leaned back on the couch casually, the pink glow at his breast still thrumming and pulsing.

“She was always my go-to in my mental collection, even after I met you, honey! Thinking of those times she’d let her tail slip-up, or how she smelled in the springtime. And since she became an alicorn? Oh, my Celestia her ass is so deliciously tight, even looking at it right now I’m trying not to drool. Hay, sometimes when I’m doing you from behind Cadie I like to imagine you’re a darker shade of purplllleeeee------ OH MY GOD WHAT DID I JUST SAY!? WHAT DID YOU CAST ON ME!?” Shining jumped from the couch as the pink glow faded, his eyes going wide with panic and his breaths coming ragged as he realized all the words that had been spilling out of his mouth.

“It’s called heartbleed, it’s a power of the Alicorn of Love. Forces you to reveal the true intentions of your heart. Very, very illegal.” Cadance sighed, shaking her head at her stallion before grinning wryly, “...but also very useful when dealing with hard-headed stallions who won’t admit their true feelings despite my advice to the contrary.”

Shining blushed and covered his mouth with his hooves, whispering between them. “But it’s done, right? So, I won’t reveal anything else…”

“No honey, the spell’s over… so you won’t blurt out that half of those fantasies involved Twilight dressed up in her Canterlot High uniform.”

“HONEY!” Shining shouted with anger, “PLEASE!”

“...w-was all that r-really true Shining? Y-you want to do that with me?” Twilight asked, her ears folded back. She wasn’t sure if she should be excited or scared, ashamed or enthused. “You think I’m... sexy?”

Shining turned away from the clownish antics of his wife, who was clearly enjoying herself far too much. “Twily, I… I’m so sorry. Colts are… well, we’re all really horribly disgusting in our heads, but that’s all just fantasy, I swear… I would never do that.”

“So, I’m n-not sexy?” Twilight felt tears forming in her eyes, and she didn’t know why. She had no idea what she wanted to get out of this.

“No, it’s just… Gah…”

“Give it up, Shining.” Cadance slipped onto the couch next to Starlight.

“...Yes. Yes, I think you’re, really… really cute Twi.” Shining looked drained, a pony who had truly just emptied his soul for the world to see.

“Huh.” Twilight swallowed nervously. “I… I uh… I guess, I’ve… also… thought about you sometimes… in that way.”

“W-what way?” Shining choked out, his head tilting.

“Honey, did you think that only colts lock their doors for some ‘private’ time?” Cadance giggled. “I bet Twilight’s hooves have more ‘downtown mileage’ on them than yours do.”

“Hey!” Twilight protested, shooting an angry glance at Cadance.

Cadance simply shot her back a knowing look.

Twilight slumped down, trying to keep some of her dignity by muttering: “...I mostly used magic…”

...

“Oh. Oh jeez... “ Shining coughed into his hoof. “N-now what?”

“Ahem.” Cadance wiggled the glass vial, still sitting empty on the coffee table.

“Really? Right now… right here?” Shining asked, his eyebrows raised in disbelief at his lovely wife.

“Yep.” The pink alicorn nodded with a chuckle. “It’s for the good of Equestria, no way to weasel out of this.”

The white stallion looked nervously from his wife to his little sister, his blush burning brightly as he rested his haunches on the sofa, sitting hesitantly, slumped over at the waist. “I mean… I’m… OK with it Twily, if you are.”

Twilight was flexing her wings as hard as she could, doing everything possible to try to keep them from extending, but the darn things were throbbing fuller and fuller, sliding out from her sides. This is really happening! I’m going to… touch… a stallion! My brother… Shining!

Twilight nodded softly, her ears folded back slightly as she turned to face her brother, the colt who’d helped raise her. His big, strong chest looked so inviting, it had long been the source of so many snuggle-hugs of comfort… he leaned back, slowly exposing more of his belly, her eyes tracing down toward his legs, which parted slightly. Twilight shut her eyes tightly, scared to look at what would now be revealed to her.

“Y-yeah… as… as long as this is… for Equestria.” Twilight swallowed nervously. “Clinical. Professional.” She began to power up her horn, keeping her eyes shut.

“O-of course!” Shining nervously stammered, sweat trickling down his face, as his little sister positioned herself between his legs. “T-totally clitical… I mean clinical.”

Shining’s slip of the tongue made Starlight and Cadance, both watching from the couch, snicker.

“Wait a minute. Shouldn’t we do this in private?” Twilight asked, looking quickly over at her friend and sister-in-law.

“Aww, please!” Cadance whined. “I really wanna stay and watch. I could really help! I know all sorts of tips and tricks.”

“I don’t know… it’s… weird.” Twilight replied.

“Well, I for one think it’s weird for her not to be here…” Shining piped up. “I’m more comfortable if we’re not… y’know… all alone… doing that.”

Cadance squee’d. “That makes it two to one!”

Twilight turned to her friend. “Starlight?”

The blushing purple-pink unicorn had been sitting in silence on the corner of the couch, a dopey grin on her face as she watched the chaos unfold. Now she was suddenly thrust into the fray. “Oh, I really shouldn’t get in the middle of something like this, I really don’t want to say one way, or the oth-” A pink glow surrounded her chest as Cadance’s heartbleed kicked in once again. “...but there’s no cable here and Twilight only has a TON of old books so if I had to say, I think I’d actually really like to see Twilight hoof her brother off. I mean, I kind of think Twilight has that nerdy-sexy vibe nailed... and her brother is pretty cute... and I keep hearing from everypony how big he is I wanna see for myself... plus I kind of have a thing for semen and I feel like I’m in the splash zone here so I’m a little excited and ohmyhorseapples I CAN’T BELIEVE I SAID THAT.”

Cadance grinned, shutting her horn magic off. “Well that settles that, so I guess there’s only one thing left to do Twilight… or rather… one pony to do.”

Twilight gulped.

Twilight opened her eyes, looking up at her older brother, sitting right in front of her. His face seemed just as nervous as hers, but those reassuring big blue eyes that she had known her whole life were still there, looking back at her supportively. She couldn’t delay it any longer, she let her eyes glide down to take in… him.

Below his little belly button and toned lower abdomen, she saw it. A dirty off-white sheath perched above two big, black orbs. She was struck by how circular and heavy they looked, like two oranges made of lead in a small leather pouch, pulling the skin away from his body.

“H-huh… th-that’s not… so big and scary.” Twilight mumbled to herself, letting out a little sigh of relief. From all the talk she’d been expecting something more like a giant anaconda to have sprung up and hissed at her.

“Oh, ho ho, don’t you worry Twilight.” Cadance giggled from the couch. “He’s a grower.”

Twilight heard the joke, but it barely registered. She was too busy taking in all the sensations of her brother’s private bits being right in her face. Her eyes took in every wrinkle, every tuft of fur, how the skin rippled and stretched with each breath he drew. In her dreams she’d always imagined more of a concept of her brother… never anything so tangible as this.

And there was a smell.

Her nose had picked it up immediately. She’d remembered picking it up from time to time in Shining’s room when she was younger. Either coming from his pile of laundry… or on his bed… or sometimes in the air after he’d had his door closed for some time. She’d always thought of it as just a ‘smelly boy stink’... but it wasn’t quite that. Sure, it was a bit musky… but there was a sweetness too it as well. A sense of security… of spice.

“S-so what should I… uh…” Twilight asked, looking up at her brother with a blush.

“Y-you’ve never… um… done this before?”

Cadance piped up. “Just give him a nice relaxing rub, Twilight, that should be good to start.”

Twilight ignited her horn. She let the purple magical field reach out from her and over to her brother’s body, wrestling on the spot just above his sheath - she was still too nervous to touch anything. She began to calmly pet his stomach. She looked up for reassurance at Shining’s face, but he was grimacing. Was she taking too long?

She moved her aura field down quickly, letting the field of magic slip over the tip of the fuzzy sheath before it began to little pet and rub, as if she were simply massaging her own arm. I’m… touching it! My magic is actually touching a penis! And not just any penis! It’s Shining’s dick! Twilight felt her heart flutter with excitement.

Something else of hers was starting to flutter too.

She could feel a warmth between her legs starting to smolder, and she carefully shifted on her haunches to make sure she was sitting as direct against the ground as possible. She didn’t mind Shining’s smell, but she had no intention of sharing her own with the entire room.

“Is… is this working?” Twilight asked, looking up hopefully at her brother, whose hooves were clutching at the couch edge, while he gazed back into his sister’s eyes.

“Oh Twilight… Shining really isn’t a huge fan of magic jobs. I do them from time to time, but his real favorite is hoof-contact.

Twilight felt her hackles raise slightly and she spared a quick glance to Cadance, she wanted her to get even closer? To actually touch him?

Looking back to her brother she swallowed her fear and reached her hoof forward with tentative hesitation, the inches receding as she approached and crossed the line of no return until, inevitably, they touched.

Shining trembled as her underhoof pressed into his sheath. “Y-you’re… warm…” Twilight whispered.

“Your hoof feels... nice, Twily.” Shining mumbled back.

Then Twilight felt something else. Hotter, wetter. Sliding out under her frog, sliding out onto his belly. In no time at all she could see it. Black flesh that throbbed and glistened, spilling out like a growing tentacle as it grew and grew… and grew.

Twilight continued to clumsily rub near the knobby end of her brother’s growing erection as it flopped up his stomach flaccidly, each pump of his racing heart (she could see it thrumming under his ribcage) sending hot stallion blood into the fattening tube of flesh growing in front of her eyes.

Big. He really IS big! Twilight thought, biting her lip. She didn’t think that stallions could get so big. She spared a glance over at the spectators on the couch. Cadance had an ‘I-told-you-so’ grin plastered across her face, and Starlight could only watch with open mouthed wonder.

Twilight’s eyes returned to the black sausage as it started to pump fully erect. Filling up and stiffening, lifting its ever-growing weight off her brother’s toned stomach as it began to bulge and fatten before her very eyes. The whole thing curved away like an obscene giant banana… still not fully erect, not plump enough to be as stiff as those steel rods she’d seen in those anatomy textbooks, but already far surpassing them.

“Mmm…. Twily…” Shining moaned, as he shifted and spread his legs a little wider. “Y-you’re… doing good.”

Twilight quickly levitated the flask over from the coffee table, hovering it above the end of her brother’s almost fully erect cock. “A-are you close? W-where should I put the flask?”

Cadance laughed. “Twilight… he’s not even hard… you don’t need that yet.”

Twilight blushed and put the flask back onto the floor. The… cock... was resting fully in her hooves now. It had stopped growing any longer, finally. Now each throbbing pulse of blood simply made it fatter, fuller. Like one of Pinkie’s expanding balloons, it drove any bend out of its considerable length… until finally… it was proudly, beautifully, fully erect.

How could something so… HUGE… come from something so small? And how the HAY could she ever take THAT inside of her? Twilight thought. She swallowed the saliva that had been building up in her mouth and leaned back, taking in the whole of her brother’s organ…

Under her hoof was his knobby stallion head. It was easily fatter and rounder than her hoof-width, smooth and hot against her frog. The ridge traced out a funny shape, akin to a strange diamond-semicircle, and in the middle of the bulbous end was a thick cockslit.

Down from that was his whole, fantastic, heavy length. Her keen scientific eye estimated his size at anywhere between 16-17 inches long. She resisted the urge to fetch a ruler to get something more precise… and its thickness… the thing was easily as wide as her leg! It basically was one of her forelegs! If her foreleg had a knobby end, was covered in black, throbbing veins… and had a ring of hot flesh part way down… before expanding to girth of terrific size.

“H-how… do you support this thing?” Twilight asked under her breath, looking at where the thick girth met her brother’s underside. “It looks so heavy…” She lifted the end of his penis experimentally, feeling the heft of it.

“Told you, Twilight. Your family line has always had big dicks in it.” Cadance chuckled.

Both Shining and Twilight’s heads snapped across to look at the impious alicorn of Love. “How do you know THAT?” both Shining and Twilight asked in unison.

“Oh, just another perk of being the alicorn of love! I can sense body compatibility among all ponies around me… and since I’m Equestria’s biggest size queen, and my radar is constantly set off by your lovely father… I think I have a good idea where Shining gets this blessing from.” Cadance grinned. “But I think you’re getting a little distracted, hm?”

Twilight’s ears popped back up in surprise and she looked back at the massive tool in front of her.

“O-oh… yeah… I just do it like… this right?” Twilight began to squeeze the end of her brother’s fat knob rhythmically, like it was a stress ball, as if she could wring out the fluid she needed.

“Mmm!” Shining groaned. Twilight couldn’t tell if that was good or bad.

“Twilight, you really haven’t ever given a hoofjob before have you?” Cadance asked with some concern. “You need to really work the whole whole thing… you’re trying to simulate as if he was actually having sex, after all.”

Twilight brought her other hoof up, chewing her lip with nervousness. Holding either side, she began to slide her hooves down either side of her brother’s penis. Her eyes flicked back and forth between what her hooves were running over and Shining’s face. As her frogs slid past his sensitive ridge, she saw him give the cutest little clenches and quivers. Down, down, down her hooves moved… over hot black flesh, over his medial ring, which made him made him squeeze the cushions of the couch. As her hooves slid further and further down, now moving apart as they reached the widening part of her brother’s base, she tried to imagine how such a huge size could ever possibly fit in her…. In anypony! If this was supposed to simulate sex… her marehood would have to spread this much?

She reached the bottom of his cock, her hooves pressing into his belly on either side of his thick shaft. She giggled slightly as she tried waggling the huge organ, enjoying the look of pleasure it gave her brother as his tool wiggled under her ministrations.

“Having fun down there?” Shining smiled, after a groan.

Eep! Twilight thought, ears pinning back. “S-sorry… clinical… I didn’t mean…” Twilight stopped waggling and reached her hooves back up to her brother’s head, as she blushed and tried to clear the smile from her face.

“N-no! I didn’t mean that…” Shining sighed. “I-I was hoping you were…”

Twilight looked up through her bangs at Shining as she began her second stroke downward. “Mm… mmmh…”

As she pumped down, twilight noticed something new coming out of the end of her brother’s cockslit. A dripping stickiness that now burbled from his glans, chasing down behind her hooves in a sticky stream of hot pre-cum.

“Oh no!” Twilight snapped her magic on again to get the flask.

“Relax Twilight, that’s just pre-cum.” Cadance giggled.

“Pre-...? Oh! Pre-ejaculate!” Twilight let out a little sigh, as her hooves reached the bottom of her second stroke. “But that means he’s close, doesn’t it?”

Cadance shook her head. “No! Shining has always been a prodigious leaky little colt.”

“Oh… ok.” Twilight set the flask down. She eyed the bubbling liquid sliding out of her brother with a bit of trepidation, before reaching forward and getting some on her hooves while starting her next stroke.

Hot. Slick. Sticky Twilight had her brother’s arousal on her now. Wetting her hoof-fur. The same big brother who’d picked her up when she’d fallen off her first bike. Who’d cheered her up when she’d gotten her first A minus. He was now making her hooves sticky with his fluids.

Twilight pumped faster.

Cadance chuckled. “No, I’ve taught Shining the value of stamina over the past few years, he won’t be finished after only a few p-”

“OH. OH… OH BUCK!”

Twilight heard her brother suddenly begin to groan, his eyes clenching shut and his hooves digging into the couch sharply. The cock between her hooves began to jump and pulse, with rapid throbs. Again and again. Right in front of her face, she watched in disbelief as the knobby cock-head of her brother suddenly flattened and widened, flaring out to the size of a saucer plate.

How the buck does Cadance take THAT? The thought raced through Twilight’s mind. She didn’t think at all about the fact she was staring right down the barrel of a gun. Didn’t take notice of the fact her brother’s hips were making little humping motions, that those big black balls of his had suddenly shot up in a clenching pull… that the cockslit right off her nose had swollen and opened.

Something boiling hot, wet, and sticky splattered into Twilight’s face, hitting with enough force to make an audible sound as it landed between her snout and left eye. Twilight’s eyes snapped shut, as she instinctively protected her vision from some unknown source of fluid.

“T-T-Twiiiiiiiiii!” She heard her brother’s moan as splatter after splatter of hot substance sprayed all over her in heavy, thick ropes. First in her mane, another in her face, one right up her nose and mouth, on her chest and neck, as she moved the spurting stallionhood awkwardly to avoid the copious splatter shooting from his cock.

Finally, she found an angle that was no longer soaking her, though she could now hear the squeaks and shuffling of Cadance and Starlight. With the brief refuge she’d found, she buried her head against her left arm, clearing it from the goopy mess that had blinded her… and she opened her eyes.

Her brother’s fat, jerking cock was still exploding in her hooves, sending arcing jets of fountainous cum shooting up in the air, before landing in long, painted white lines across the couch… and its inhabitants. Her brother was still giving out a long unbroken moan, firing shot after shot, the white streams staining the blue fabric of the couch… and the pink-purple laps of Cadance and Starlight.

“W-wow…” Twilight murmured, as she felt the cock between her hooves pulse and throb, could feel the torrent of sperm rushing through the fat pipe in her grasp. Unthinkingly, she reached up, as if to plug the blasting pipe-end. She felt one of his hot, wet, second-long streams splatter against the underside of her hoof, showering everywhere in a small sprinkler of batter.

“B-buuuck….” Shining’s groan began to tail off… and the force of his next ejaculation was a bit weaker, spilling messily over and down his swollen tool instead.

The FLASK! Twilight remembered suddenly. Hovering the bottle up.

She barely managed to slip the bottle into position to catch half of her brother’s final pulse, as it dribbled from his tip and down his glans, dripping into the chemist’s flask.

“...wh-what the BUCK Shining!?” Cadance chuckled with bemusement. Lifting her drenched arms with wonder.

Twilight released her brother’s cock as she grasped the flask for closer inspection. The huge and heavy tool stuck proudly in the air like an obscene flagpole, as it stayed jammed in its rigid post-orgasmic torpor, complete with terrifying flare, easily an inch or two longer than it had been at its most erect state.

Barely any! Not more than a thimbleful! Twilight looked with shock at the glass, even as she felt the thick, spoogey, froth dripping down her forehead and rolling over her lips… could smell that enticing, alluring… erotic musk EVERYWHERE: in the air, in her fur, in her mane, in her nose… in her very being.

“I thought you said he wasn’t close!” Twilight groaned, turning toward Cadance, trying not to focus on that amazing smell… that taste.

“He doesn’t usually… pop… that fast… or that much.” Cadance chuckled. As she wiped herself down with a free wing. “He certainly made a mess of Starlight and I.”

Twilight looked at her friend, who had a bemused smirk on her face. She’d caught a good deal of the ropes across her lap and didn’t seem in any hurry to clean herself up.

“S-sorry… huf… huf… I… I’ve never…. Cum like that… before…” Shining huffed, completely out of breath from his spot on the couch.

“Oh… that’s OK.” Starlight mused softly, her attention still on the splatters that had landed across her body. She lifted her left fore-hoof, which had caught some of the drops of Shining's explosion, lifting it to her mouth. Twilight watched with wonder as her friend casually licked the sticky spots off herself, swirling her tongue in her mouth.

Cadance noticed too. With a grin she winked at the unicorn, “Not bad, hm?”

Starlight’s face grew red as she realised what she’d just been caught doing. “Mm… it’s uh… very… stallionly.”

Cadance chuckled. “I know, right? Shining practically drips with stud-potency. Though you’d never think it after seeing him go-off like a two-pump chump! Honestly dear, I’m a little disappointed in you. You’re going to give me a bad name!”

Twilight felt that potency dripping down her face, her body. Shining’s cum. My BBBFF’s cum! The colt who taught me how to fly a kite… his… ejaculate is all over me! And I was the one who did that! She let her tongue slip from her lips and pull in some of the juice. Oaky, sweet, spicy, rich, powerful. Her tongue exploded with the potent aphrodisiac as the stud-fluid flooded her senses.

It wasn’t tasty. Not in some traditional sense, like a Pinkie-Pie cupcake, or a glass of Applejack’s special cider. Something else, something more primal. It ignited taste buds she didn’t even know she had, little neuronal networks igniting like sparkler fountains all through her mind. The heat from the popping sensations spread throughout her, sliding down her throat and filling her belly with fire, not unlike the way the delicious substance slicked down her gullet.

Warm. Hot. Burning. From her gut to her head… and… in her nethers too.

She needed more.

Her tongue slid from between her lips, licking up a healthy dollop of the still warm gelatinous fluid, pulling it into her mouth. Impossibly, the second taste seemed even better.

“Huf… huf… oh, man… I’m so sorry Twily I…” Shining Armor had begun to apologize, before he looked down at his little sister, who was scooping the various splatters and splashes he’d just deposited over her face into her hooves, before surreptitiously lapping it up. “I… uh… huh…”

“I… I’m just cleaning up… that’s all!” Twilight blushed, pulling her sticky hooves away from her mouth. She felt like a filly who’d gotten caught with her hoof in the cookie jar. She watched as her brother flinched and grimaced at her statement. “W-what? I was!”

“It’s not that… uhnf… Twily… it’s just… I’m a little… sensitive right after... “ Shining Armor’s eyes flicked down at his groin.

Twilight realised that her left hoof was still slowly pumping the base of his turgid rod, still swollen with powerful, black, throbbing flesh. “Ah!” She pulled her hoof away as if it had just touched hot iron. “S-sorry! I-I didn’t…”

“I get that you’ll need more, Twily… just… I need a little bit before… I can… y-know…” Shining groaned, shuffling his legs underneath him.

“You know, Twilight, you can always give your brother a kiss to make him feel better…” Cadance giggled, leaning in like a predatory vulture, cajoling her young sister-in-law further down the path of debauchery.

Author's Note

Well... she got some of it in the flask.

That counts, right?

Collection Attempt #2

“Ewww… a kiss with my brother?” Twilight recoiled, sticking her tongue out of her muzzle in disgust. ”Th-that’s… weird right?”

“Not THAT kind of kiss, Twilight…” Cadance grinned evilly, not for the first time that night, her eyes flicking down toward the throbbing sausage standing proudly between her husband’s legs.

“Honey!” Shining exclaimed. “This is Twilight you’re talking about!”

“So? She’s not a little filly any more Shining, she probably knows all about making stallions learn all about the magic of friendship.” Cadance waggled her eyebrows.

“Actually, I’ve … n-never…” Twilight began, her eyes glued on the end of her brother’s menacingly fat, dripping, black cockhead.

“It’s just like an ice-cream cone Twi, it’s really not that complicated.” Starlight mumbled.

“There you go! Thank you, Starlight!” Cadance laughed, happy to have another pony back her up. “So, Shining, why don’t you just lie back, let your deepest, darkest fantasies come true, and let Twilight make it all better.”

Shining’s swallowed heavily, eyes racing between his overly-encouraging wife, his little sister, and his throbbing phallus. “Twilight… would never… she’s my little sister!”

Twilight had been leaning closer and closer to the big black cock as the discussion had gone on. Its quivering, drooling tip was only half an inch away from her nose now, and the scent of her brother’s recent orgasm mixed with the smell and musk of the juices he was extruding was heavily intoxicating.

She’d seen blowjobs, in magazines and in pornos, she knew how they worked. She’d never been able to imagine just what it was that could make a mare want to stuff something like that in her mouth… but with this potent, sexy, virile shaft in front of her… she was beginning to change her mind.

But this was her brother! The last time her lips had touched him was when he’d skinned his knee playing backyard hoof ball with his friends. She’d playfully given him a kiss on his scratch to make him feel better. He’d immediately complained about girl-cooties and swatted her away, complaining that she was altogether far too baby-ish trying to kiss it better. Now she was staring at his cock, not his skinned knee… and cooties were a distant nothing compared to the burbling juices slipping from his tender cockslit. Could she really kiss… that?

Yes.

“Twilight, you don’t have to -oooohmmy Celestia!” Shining’s statement was cut-off as Twilight leaned forward, her nose booping the end of his penis.

Twilight looked up into her brother’s deep blue eyes as she opened her mouth, let her tongue drop out of her mouth, then place a long, languid lick that started below his glans and lovingly wrapped up to his juicy orifice.

That taste, that sensation, the one that had filled her so heavily with his potency just moments before… now she was drinking directly from the source… and she liked it. Opening her mouth wider, Twilight tried to wrap her lips around Shining’s fattened glans. He’d calmed down some since his flaring ejaculation a few minutes before, but it was still no easy task trying to get such an impressive mushroom into her mouth.

“Wooo! You go Twilight!” Cadance cheered.

But she barely heard her. Twilight’s whole focus was on the incredible taste of her brother’s stallionhood, she was desperate to get more of it, on her tongue, down her throat… in her belly. She took deep, sucking, grasping draws, like she was working on a milkshake that was far too thick. Her tongue roiled and lashed without purpose, she had no talent or experience, but she would make up for that with enthusiasm.

“F-f-fuck!” Shining moaned from above her, as she managed to jam the entirety of his head into the back of her mouth, just barely clearing her teeth. She felt her brother’s powerful hooves carefully grip the back of her head, not to push more of his huge size into her, but to stop her from assaulting him so rapidly. “T-twi!”

But she was possessed now. Shining’s cock was stiffening inside her mouth, growing again as she fellated him, moving back and forth with little gulping drools. She shut her eyes and tried to focus on her breathing, as she felt her big brother best friend forever start to scrape the back of his throat with his thick, hot, tool. Twilight could feel the drool dripping from her mouth as she schlicked back and forth slowly, groaning and gasping as she tried to swallow more of that black monster.

“Oh… oh shit… Tw-Twily!” Shining Armor’s hooves gripped and clenched at her mane, as her brother began to try to pull more of himself into her. She could feel the juice spilling directly down the back of her throat now - she was gagging on his massive cock… but she wanted more. Her hooves reached out, gripping the black shaft filling her face - she wasn’t even close to the medial ring,... and the amount of cock that her hooves slid down before reaching her brother’s warm stomach terrified her… and excited her.

He was such a stud. More than her wildest imagination. More than her most debauched, blanket-twisting, pillow-humping fantasy. And now he was inside her. She had his balls in the frog of her hooves!

“Twilight! I’m… I’m g-getting… c-close…!” Shining grunted, his body starting to quiver and jerk, his balls jumping and clenching.

“Already!?” Cadance exclaimed in disbelief as her husband’s lack of forbearance surprised her for the second time that evening.

The flask! Twilight’s eyes shot open as she remembered just WHY she was here. With her brother. Doing this.

She started to pull back, to withdraw her brother’s cockhead from her gullet, as she levitated the flask into position near her chin. She’d pull him out, slip the glass flask under his glans, and listen to the soft pinging sound of shooting liquid striking the inside of the nearly empty container, and she’d have all the essence of unicorn she’d need.

But it was too late.

She felt the throb of her brother’s cock on her tongue as the first pulse shot through his shaft. Like a dentist wrenching her mouth open for an inspection, her brother’s rock-hard flesh bulged and grew in her muzzle, stretching her jaw to a level she didn’t think possible. At the same time, her brother’s cockhead mushroomed out into the powerful, aggressive flare she’d witnessed first-hoof only minutes before… only now it was flaring in the back of her throat.

For a brief second, Twilight realized she couldn’t breathe, her esophagus completely plugged with big, fat, unicorn cock. She’d taken a breath just before this had happened, which saved her from a panicking, choking, gasping disaster… but it didn’t save her from the flood that followed.

The whole burst of her brother’s first shot exploded into the back of her throat, coating it with his thick, creamy coat of virile paint. Twilight had no choice but to swallow and swallow and swallow. It felt like she was trying to chug an entire pint-sized jug of Pinkie’s extra-thick vanilla milkshake… if the milkshake were being tube-fed down her throat, and it was hotter and thicker. Each swallow did little to clear the blast before hand - most of her brother’s thick ropes were being blasted directly down into her belly, splashing her fuller and fuller with his batter, as if her gut was an oversized womb.

All she could do was take it. There was no way to extract his flare, which had knotted itself inside her, jamming against her throat. She could only paw weakly at his chest, moaning and choking on his orgasmic cock.

“F-f-fuuuuuuuuck!!!!” He groaned out, giving out once last buck, before slumping back onto the couch.

Twilight was dragged forward as he fell back, her tired and sore-throat still jammed with Shining’s big fat flare. Twilight managed to open her eyes, her face filled with stallion-cock and pressed against her brother’s lower stomach. She could see him panting and sweating in a heap, his whole-body quivering and shaking. Her face was starting to turn red from lack of oxygen, and as soon as she felt Shining’s terrifying, throat-blocking flare soften even the slightest bit, she tore the thing from her without too much consideration, spittle and cum splashing from her sore jaw as she took a well-deserved and deep breath.

Shining winced and mewled, the sensation barely registering as he basked in his orgasmic bliss.

Twilight coughed and hacked, swallowing over and over to try to get some sensation back into her mouth and throat.

“Holy horseapples… are you OK Twilight?” Starlight asked, placing a hoof on her friend’s back.

“You did amazing Twilight.” Cadance cooed, her hooves straightening the purple alicorn’s mane. “I can’t believe you actually did a deep throat on your first time! Even I didn't manage that!”

Twilight put a hoof to her chest to steady herself as she pushed back up away from her comatose brother, and the giant cock, which now lay floppy and messy against his belly, just as drained as he seemed to be.

“F-fat load of nothing it did for me, though…” Twilight coughed, as she hoisted the almost-empty flask, which still held only a few squirts of her brother’s ejaculate. “I doubt that that Shining’s ejaculate will work as a reagent if I hork the whole thing up... “ Twilight patted her belly, feeling it squish and slosh. “I must have drunk a gallon of the stuff!”

Cadance and Starlight chuckled, sitting back on the couch, trying to hide their mirth as they looked between the disheveled Twilight and the half-snoring stallion.

“It’s not funny guys!” Twilight stomped a hoof. “The whole point of this was to get Shining’s seed into a container, and instead I’ve shot it all over the room, over you two, over my face, and down my throat… basically everywhere BUT the place I need it!”

Starlight got a wry grin, “I dunno Twilight, with how you were swallowing that stud-sausage I’d say you really did need it-”

“Zip it.” Twilight cast a spell which pulled an exceptionally large zipper across her friend’s mouth.

“I’m sorry about that, Twilight.” Cadance sighed, looking over at her husband. “You never can tell what can happen in the course of a real rut.” She prodded her non-responsive husband, earning only an incoherent moan from him. “And I’m afraid both little and big Shining are out of commission for now.”

Twilight looked down at her brother. Indeed, his stallionhood, previously a proud flagpole of rigid maleness… was now a flaccid, tired, sticky snake of exhaustion, laying in a floppy heap on his heaving stomach.

“S-seriously!?” Twilight groaned, plopping down on her haunches with dismay. “After I went through all of that, I’m going to go home empty-hooved? I’m going to have to do this again!?”

Cadance got that sparkle in her eyes again, and she crossed her arms, her mind already scheming with devious efficiency. “Well… maybe… maybe there’s a way…”

“Hmm? Really?” Twilight’s ears perked up. “C-could I maybe… do something while he’s asleep?”

“No…. not quite... “ Cadance giggled. “Stand up and turn around…”

Twilight arched an eyebrow with curiosity, unsure what her sister-in-law was going to do… “Oh-kay….?” Carefully she stood up and turned away from the grinning alicorn and her friend, watching with curiosity but unable to speak.

Twilight felt a slick pressure push under her half-flagged tail, quickly slipping between her hot marelips and sliding from just under her ponut, down into her honeypot, taking a moment to tweak her throbbing lovebud. “Ohhhhng!” Twilight squeaked, the magical touch delightfully teasing and playful. “H-hey!”

Twilght quickly turned around to face her mischievous sister-in-law, who was holding a small dollop of Twilight's nectar in her magic field.

“This will do quite nicely… you’ve heard of smelling salts, right Twilight?” Twilight nodded as Cadance levitated her magical field over to the unconscious stallion. “Well this is the next best thing for a tired stud…” Cadance hovered the ‘eau de Twilight’ under Shining’s nose, wafting it there for a moment.

Twilight watched with wonder as her brother’s nostrils twitched, then flared, drawing in deep huffing breaths. He was reacting to her!

“C’mon lazybones… or should I say lazybone?” Cadance laughed, before smearing the sticky marecum across Shining’s nostrils.

“Mmmmghhnnn….” Shining groaned, beginning to stir and nicker.

Twilight watched in fascination as her brother’s cock began to throb and pump again, like a thick firehose filling with water pressure, twisting and jumping, pumping up fuller and fuller and fuller… rising with each heartbeat and stiffly erecting itself away from his body.

“THAT’s my stallion!” Cadance giggled, patting her husband’s forehead and clearing his sweaty brow as he continued to rouse from his exhausted blissful post-climactic bliss.

“MMHMMFF!” Starlight coughed, pointing at her mouth.

“Oh, sorry Starlight.” Twilight mumbled, finding it hard to take her eyes away from her brother’s pumping, pulsing, re-risen cock. With a quick flip of her horn she released the muting spell from her pupil.

“Ah… ahem… thanks.” Starlight grumbled. “If you’d given me a chance to keep speaking, I was GOING to say that I think I might have an idea to help you with your harvesting trouble.”

Twilight snapped her head away from her brother, whose eyes were fluttering open over to her friend with a growl and a deadpan look. “And… you’re just deciding NOW to share this?”

“Hey! I didn’t think that you’d have such a tough time aiming!” Starlight’s horn glowed with her purple aura, and she snagged her saddlebags from over by the door. “But since you have been… here!”

Twilight saw the small package float out of Starlight’s bag and took it in her hooves. A small plastic container printed in a lascivious crimson. COOLCO BRAND CONDOM - RIBBED FOR PLEASURE - SIZE M

“Honestly, I got the thing as a joke secret Santa present from Rarity two years back, not even sure if it’s expired but…”

“...but if we use this then there’s NO WAY that we won’t get every drop from Shining regardless of what happens!” Twilight’s wings flared out with happiness. “Perfect! This is perfect!”

“Unghh… what’s that amazing smell?” Shining groggily pushed himself to a seated position with one hoof. “...reminds me of lilac and wet marehoo-…” Shining shut his mouth as his brain finished rebooting and he slowly remembered how he had come to find himself here, covered in his own cum, next to three cum splattered mares… one of which happened to be his sister.

“That would be Twilight’s pussy, dear.” Cadance smiled.

“O-oh…” Shining swallowed again, pushing himself up to being fully seated. He blinked and sniffed, trying to clear his nostrils of the poignant musk and failing. “It’s… uh… w-wow… not gonna lie… I… I’m having trouble concentrating.”

Twilight cleared her throat. “W-well that makes two of us, Shining. But I think that we can give this one more go, and this time I think there’s no way I can blow it.” She snagged a corner of the COOLCO condom package in her mouth, biting into the wrapper and pulling the thing open. “See?”

Shining shifted uncomfortably, his eyes bouncing back and forth between the condom and his little sister, holding the thing as prim and happy as the cat that caught the canary. “A c-condom? Y-you really want to go… all the way?”

Twilight felt her breath catch in her throat. She hadn’t even been thinking about that! It had never even entered her mind! She looked at the big, black, throbbing cock in front of her, exciting and erotic in its own terrifyingly gargantuan way… and the stallion it was attached to, the only colt she’d ever loved… truly loved… with his big dumb heart, and his powerful chest, and his winning smile. She felt the pit of her stomach (still filled with his bubbling seed) sink, as she realised that… yes, she DID want that, somewhere deep down.

But she couldn’t admit that!

“N-no! No!” Twilight blushed again, squeaking. “I… I mean that we can put the condom on and then you’ll… deposit in there… so nothing will be wasted or misfire… that’s all…”

“Oh. OH!” Shining coughed, then nodded. “Y-yeah! Oh man… I don’t know what I was thinking! That makes sense.”

“Want me to help slide the thing on, Twilight?” Cadance offered. “They can be tricky if you haven’t done it before.”

“No!” Twilight cried out, swatting Cadance’s hoof away from her husband’s penis. “I have to do this!” With a deft touch of her magic, Twilight hovered the condom over to her brother’s massive, stiff pole.

“Other way, Twily.” Shining grinned as his sister flipped the little roll of silicone and slid it over the crest of his dick.

Twilight chewed her tongue in concentration as she began to unfurl the little slip of condom. She watched her brother’s face as it winced and grimaced, the black flesh of his big cockhead bulging obscenely against the little bit of clear wrapping. “Wh-what’s wrong?”

“Usually he gets the magnum XL size.” Cadance giggled, pointing at just how strangely the condom strained and stretched under the strain of Shining’s massive, princely cock.

“It… it’ll work!” Twilight grunted, as she rolled out the rest of the condom… which ended pathetically just past her brother’s big, fat medial ring… leaving a good 5 inches of his 17-inch organ completely bare. “Well… it’ll work for what we need it for, anyway.” She looked up at her brother, who was looking back at her, the big pole the only thing between their gazes.

Twilight swallowed slightly and took a grip on her brother’s base, where the condom hadn’t reached. “I-I’m… going to start… again…” Shining simply nodded back at her.

Twilight began to slowly pump her brother’s base, slowly marveling at just how thick he was down there, before working her hooves up to the bulging plastic that could barely hold him. It felt like she had a balloon in her hooves that was strained to the absolute limit, totally ready to pop. It struck her again just how… stallion-ly her brother had become at some point. He wasn’t the colt of her childhood… at some point he’d gone and grown up… had become an absolute stud, in every sense of the word.

He was now her BIG brother best friend forever. She bit her lip, looking at the drips and drops of precum slicking the inside of the bulging silicone. She kept pumping, but it felt… wrong. Not the obvious wrong of her hoofing off her brother… but that she was doing it this way… so cold… so clinical. Just pumping him off like he was some kind of farm animal. After they’d been so close before. After he’d even almost suggested… that they… buck.

Gods she wanted more.

“T-twilight…?” Shining’s question interrupted her train of thoughts. A shiver ran through Twilight’s back as she stopped pumping and looked up at her big brother. It seemed like he was too ashamed to meet her eyes, like he had something difficult to say.

“Y-yes? Am I… doing OK?”

“Yes! Yes.” Shining answered quickly. “Really good… I just…” he bit his lip, looking over to his wife. Her eyes looked as big as dinner plates, and her wings were fully extended, like she was about to get what she had wanted all night long. “...I… never mind.”

“Shining, dear...” Cadance groaned, stomping her hoof. “Go on! Speak from your heart!”

Shining hesitated, chewing his lip as he sought the right words. “Twilight… I… augh... I can’t!”

Twilight tilted her head, so that she could see Shining’s face without having to stare through his penis. “What is it? You can tell me, Shining.”

Shining let out a big sigh, as if the weight of the world was compressing him into a pancake. “Twily… you know… when you showed me the condom… and I thought you meant that you wanted to… well… wanted me to… y’know?”

Twilight was silent, her ears pounding as she wondered if Shining was going to say what she thought he was.

“Well… I… was really excited for that.” Shining swallowed. “I… don’t know if it’s just this crazy night… or the fact that I’ve got your scent jammed up my nostrils and it’s more fragrant than that one time back when you were in high school and your heat came early…. But…”

Shining’s deep blue eyes locked with Twilight’s as he looked up guiltily from his rigid penis. “I… I want to rut you, Twily.”

Twilight’s mouth fell slightly open. Her big brother, the one who’d given her piggy-back rides, who’d taught her how to fly a kite, who’d read her stories about Starswirl the bearded, who’d been there to give her hugs and tell her dumb jokes when she felt down… he wanted to fuck her.

And she wanted him to do it.

Author's Note

Twilight, I'm pretty sure you can't even make the excuse that this is even remotely scientific now.

Collection Successful... Sort of?

As if a weight had been lifted from his shoulders, Shining let it all flow out, like a collapsing dam. “Gods, I know it’s so wrong, Twily. I’m so sorry. But I want to bend you over that coffee table and buck you silly - I’ve always wanted to do that, ever since we were foals. But I’ve never wanted it more than now. I want to take you, Twily. I want to make you mine.”

Twilight blushed, feeling tears forming in her eyes. “I-I… I want you to rut me too… Shining. I want you to do it.” She felt her ears flatten back, and she shrank into her shoulders, almost dizzy with the rush of what she’d just said.

“R-really!?” Shining gasped, breathlessly.

Twilight nodded. “I… I don’t know what to do… but… I want you. I want to do it… with you.”

Shining scooted up, quickly jumping to his hooves, taking his little sister’s chin in his hoof, and moaning “Twilight…”

Then he kissed her.

Deep and passionately. Not like a brother. His powerful tongue thrust into her tired mouth, overwhelming her, dominating her inexperience, leaving her completely at its whim as it traced along her teeth and gums. Then, just as she was settling in to the fiery heat of his kiss, he pulled back, breaking their connection. Twilight almost fell forward into him. Her heart was pounding so hard, she felt so dizzy… was this really going to happen?

“Sorry Twily… but… I can’t… I can’t wait anymore.” Shining groaned, twisting his little sister by her shoulders, so that she was facing the coffee table.

Twilight felt her brother’s powerful hoof push her forward, making her front legs step up onto the small wooden table. She wasn’t resisting, but there was something so… feral… so masculine about how her brother was moving her around. Is this how mares feel, when they’re with their lover? Or is this just because of Shining? She looked back over her shoulder with a bit of fear… she saw with some embarrassment that her plot had stuck itself proudly up in the air, instinct and biology completely taking over as her tail flagged up high, giving her brother and the two spectators on the couch a full view of her nethers. She didn’t care.

Shining nickered, stamping one of his hooves as he caught another whiff of Twilight’s rear. He looked down at her delicious plot and took a deep snuffling snort of his sister's fragrance.

Twilight felt a shudder wrack her as she realised what was about to happen. Her brother was drinking her essence in, preparing to rut her… to fuck her like their ancestors, wild stallions on the grassy plains of Equestria, would have millions of years earlier. She felt her pussy quiver and clench, twice, thrice. Fat winks of her clitoris as it shot in and out right in front of her brother’s nose, splattering a messy splotch of marejuice to their parent’s hardwood floor.

Shining dipped his head, pressing his nose and tongue against her cunt, snuffling and lapping, the thick muscle of his tongue winding its way between her tight, grasping folds. Twilight threw her head back, letting out a plaintive little wail as she writhed on her big brother, spreading her hind legs wider as she did.

“Shiiiinnnniinngg….”

“Buck me, you’re ready… Twily.”

Twilight dizzily opened her eyes as she heard the heavy clattering hoofsteps of the former captain of the royal guard step over her, mounting her. She felt a rough hoof on the back of her mane twist her despondent head around so that it was facing forward, looking down at her own hooves. She could see the big white, unshorn fetlocks of her brother as he placed his heavy forehooves on the outside of her own. She felt the heat and size of his barrel as it slipped over top of her, felt the huge and heavy hot breaths of his powerful lungfuls of air wash over the back of her neck.

Big. He’s so big. He’s always been bigger than me… but he’s just… enveloping me… encompassing me… overwhelming me… Gods… I belong to him now. Twilight groaned as her mind raced. Then she felt it, laying on her back.

Huge. Hot. Wet. Heavy… so heavy…

The damn thing reached up to the middle of her spine!

Shining stamped his left hoof, letting out a little whinny, before picking up his right hoof, trying to position his huge cock, as he shifted his weight backward to give himself more room to align himself with her winking pussy.

“Sh-shining…” Twilight groaned, thrusting back obliviously… not sure what she was doing, but hoping to grind herself against something… anything to relieve the need she felt.

“Buck!” Shining grunted, putting a hoof between his little sister’s shoulder blades and shoving her roughly forward and down, pinning her chest against the coffee table and making her stick her ass even more up into the air, as he pressed her cheek into the unforgiving wood.

Twilight suddenly felt it. The thick bulge against her pink, twisting opening. It felt so good, the perfect object for her to grind against, for her to find the relief she wanted. It felt so right. She moaned and pressed back, only to feel her brother’s cock slip from her furrow, sliding up her asscheeks and bouncing off her tight ponut and slapping off Shining’s chest.

“Hey!” Shining put his hoof back on her shoulder-blades and pressed again, adding the weight of his body to her back, pinning her in place. “Relax! Relax!”

She nickered involuntarily. She’d never nickered before. Her stud was telling her what to do, to control herself so he could rut her, she thrashed slightly under his weight then held still, feeling him make another approach.

This time… if connected.

“B-buck… l-like fucking a foal.” She heard Shining groan as he started to pierce her.

His massive girth was straining her, stretching her. None of her toys came close to this. Her breath kept catching in her lungs, the ache of her walls parting so wide it sent a pang of fear through her. He’s going to split me in half! He’s going to break me! she writhed but found no purchase against the steady grasp and slow, insistent thrust of her brother. Deeper and deeper he went, plumbing far past anywhere Twilight had ever dared in even her most frantic explorations…. And for every inch deeper he drove, fucking into her velvet depths, her aching pussy was strained wider and wider by the increasing girth of his fat stallionhood.

“Shinnninng…. It’s…. Too big!” She felt the words fall from her mouth, just like her tongue. But it was a lie. He was perfect. The strain was already turning into something entirely different, a feeling she had always read in those harlequin novels but never understood: she was being filled. Not just her marehood… but her need… her desire… her spirit.

She loved it.

Shining paid no attention to the writhing, groaning little alicorn mare under him, slowly scooching forward with his hind legs, step by step, as he pressed more and more of his huge, long, fat stallionhood into his beloved little sister.

She was stuffed. Her pussy ached with pleasure as her brother’s medial ring roiled against her opening, pushing the tight, gripping pink lips inward as they tried and failed to permit the sudden expansion in his thickness… straining, resisting… then finally giving in and letting him sink a sudden 3 inches into her.

“Ahhhh!” Twilight’s wings shot out to either side. She felt her cunt quiver and clench, spasming in shocks that drove her wind from her lungs. A sparkle of magic built up in her horn, unbidden, spilling out in little involuntary sparkling fireworks that rained down to the coffee table with a gunpowder smell. The magic sparked through all her nerves, racing out from her clenching pussy through her stomach, all along her spine, out to her very feather tips… then exploding in her brain, flooding her with pleasure.

She was cumming. On her brother’s dick.

“Fuuuck!” Shining exhorted, as little Twily’s cunt milked his stallionhood for all it was worth. The alicorn’s swollen clitoris, mashed against the wall of her lips by his tremendous girth, shot in and out with abandon, schlicking marecum all over the remainder of his shaft and his massive black balls. He was pressing up against her cervix now, the head of his cock pushing the soft interior of her womb. And he still had 4 inches in the cold, black skin uncovered either by condom or sister-pussy, frighteningly thick… he had to bury himself in her… to take her completely. Only Cadance had ever been able, not even the more experienced guard-pony ‘comfort mares’ could take him. But he needed to take her completely. There was no stopping this ride.

Shining grit his teeth and slammed forward with his hips, rocking his alicorn sister forward with a violent thrust that made her squeak through her orgasm. The leverage he’d gained with his hoof on her shoulder blades was perfect, letting himself slam roughly into her, using the force of his powerful legs to drive more cockflesh into her virginal cunt.

“Sh-shining…” Cadance began to warn.

“Buck off…” Shining grunted through his nostrils, as he roughly fucked his little sister. He was all the way gone, a stud breeding his mare, a being of pure lust. He wasn’t going to be stopped. Not by anypony.

Twilight moaned out as she felt something inside her slip, felt the huge head of her brother’s cock slip into her womb, plunging into what felt like her very heart and soul, something so deep and secret… had been invaded by her stud… and she loved it.

“Y-yyesss!” Twilight moaned out, as her brother slid even deeper into her, his huge girth impossibly fitting into Twilight’s marehood.

She felt a sharp pain in her neck, then the pulling of her mane. He nipped me. He’s pulling my hair. He’s taking me. Yes. Yes! Twilight groaned out, feeling Shining with a mouthful of her mane, as he jackhammered into her from behind. Harder and harder, faster and faster, until she felt it… his cock slip even deeper, pummeling the far side of her womb, as he hilted his huge studhood in her body. The obscene bulge reached all the way up to her breastbone.

Twilight quivered again, like a bolt of lightning had just torn through her. The orgasm that had never ended flared up into a raging intensity once again, her squeaks coming out in incoherent fits, rising to a scream as her brother stopped penetrating her… and began to fuck her.

The heavy slaps of his balls as they slammed against her pussy and teats, swinging back and forth with each piston, came with showers of juices being flung back and forth, a result of her abused, aching marehood gushing in desperation as she lubricated her brother’s shaft.

SLAP SLAP SLAP

The heavy sound of flesh impacting flesh filled the living room.

CREAK CREAK CREAK

The grinding sounds of the coffee table sliding against the hardwood floor under the assault of Shining’s powerful, impactful thrusts.

“Ahhnnn ahhhnnn ahhhhnnn! Yes… yes! YES!” Twilight’s squeaks became screams, as she lost herself to the pleasure.

“Tw… Twi! TWI! TWILY!” Shining grunted out from behind the mouthful of his little sister’s purple hair, his stamina running out as the milking, clenching, grasp of his little-sister’s slick vagina brought him closer and closer to the edge.

“YES YES YES! F-FUCK… FUCK ME!” Twilight screamed, pushing back with all her might. Her hips colliding with the jackhammering piston of Shining’s potent final strokes.

“Fuuuuuuuuckkkkk!!!!” Shining groaned out with a death-knell of a scream, before locking his legs forward, jamming himself as deep into little Twily’s body as he could and holding himself there, his balls clenching and jumping up to his shaft, little quivers wracking his body as he emptied himself in her.

The bulge in Twilight’s womb expanded outward, pressing under her belly button as her big brother’s flare grew three sizes inside of her, torqueing and twisting with the heavy rush of blood that made the whole cockhead expand terrifically in mere moments. Then Twilight felt her womb flood with heat. A spilling fullness that grew and grew, with spurt after spurt as her brother grunted out in her left ear, over and over, jerking and thrusting into her.

She felt the splattering spurts as they grew the bubble inside her, felt her belly pooch out and expand as her poor little body was stuffed with virile, thick, potent cum. The rush of endorphins, the sensation, the exertion… it was all too much, and she felt her rear legs cramp, and give out.

Not that it mattered… Shining’s potent, jerking, ejaculating cock supported her rear, holding her up in the air as it fired rope after rope into her, the biggest load of the entire night, absolutely stuffing her cervix. Twilight groaned out, the feeling of satisfaction totally beyond anything that she ever thought that she’d be able to experience on Equus… a feeling of total contentment. Not just because she’d been completely satisfied, as only a mare could ever hope to be.

But because it had been her brother who’d done it.

She let her head fall onto the coffee table, her eyes rolling happily as her panting tongue flopped again from her mouth.

On the other end, Shining finally drew a deep breath, his last spurts emptying out of him. He released his little sister’s tail, finally finished, finally satisfied. The beast within him sated. He couldn’t believe what he’d just done… but he didn’t regret a moment of it. It was the fuck of his life.

With a dopey grin, he basked in the feel of his little sister’s pussy around his softening cock. His head lolled over to the side and he twisted to look with a half-drunken grin at his beloved wife who’d helped him to this moment.

But she only had a look of complete shock and surprise on her face.

Through the foggy haze of post-orgasmic bliss, Shining wondered just what was bothering her so much. Was it that he had snapped at her? No, she’d understand something like that. And Cadance loved when their bedroom play got a little rough. So why…

Then Shining felt it. The dripping splotches falling from Twilight’s quivering marehood as he shrank and withdrew from her. It wasn’t the steady drip of sticky marecum… it was the inconsistent plops of thick, stallion-spooge.

He looked down, his gut already stewing with concern, but he had to confirm…

There, like an obscene fountain coming out of his little sister’s plot, stuck high up in the air for everypony to see, was a waterfall of his thick, very potent, very active, very impregnation-causable cum spilling from her clenching marehood… as his penis slipped from her form, revealing the snapped condom that had not survived the frenzied buck.

“Oh… oh BUCK.”

Cadance groaned. “Well… we did say that Flurry could use a sibling.”

Shining moaned out again. “Oh BUCK.”

Starlight chuckled. “Guess that Twilight’s going to have to try to collect AGAIN after all.”

Shining moaned out again. “Oh BUCK.”

The lights snapped on in the living room, and Twilight Velvet and Night Light’s voices called out as they rounded the corner. “Hey, just what’s all this racket down here…?”

Twilight Velvet piped up as her eyes adjusted to the light. “Your Dad and I could barely concentrate on… oh my.”

Shining groaned out again. “Oh BUCK.”

Celestia appeared in a flash of light in the middle of the room. “Twilight! It turns out that I accidentally replaced your birth control potion with my hyper-fertility medication, I came as soon as I found out in case there was any possible accident!”

Shining groaned out. “Oh BUCK.”

Luna appeared a moment afterwards. “Sister! Halt! I told you that I’m live-dreaming your actions to all citizens of Equestria, they can currently see and hear everything that you can, you must return to the palace at once!”

Shining groaned out again. “Oh BUUUUUUUUUUUUUUUUUUUUUUUCK.”

The wall of the house suddenly exploded inwards, a large pony-shaped pitcher of Kool-Aid standing there, with the mail mare from Ponyville bathing inside the red-liquid sloshing interior.

“OH YEAAHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH!”

The End.

Author's Note

I am so sorry for the ending.

Well... not if you're xRei or Shake, this ending was deliberately to try to get an eye-roll out of you, if I did I'm happy.

Don't even ask how Derpy got in there, nopony knows how she does it.