Isotropic Dividends

by Regidar

Rating: mature
Tags: Applejack, Apple Bloom, My Little Pony: Friendship is Magic, Sex, Big Macintosh, Random
Length: 4178

Big Mac is forced by Applejack to do something unappealing.

Big Macintosh is an honest, hardworking stallion. He's a bit reserved though, and sometimes his sister gets a bit too imposing...

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Published 2013-07-12 04:20:01 UTC
Last updated 2013-07-12 04:20:01 UTC

Four Days Old, Three Years Older

Nothing was ever much fun anymore.

Big Mac was a tired pony. Having just worked himself into a vicious sweat from the day’s chores, the farm pony looked around to find someplace that could harbor his aching body. Deciding that the pile of hay at the far end of the barn would be adequate, he trotted over and lied down, ready to catch some much needed rest.

Just as he had closed his eyes, a small creak alerted him to the arrival of another pony. Soft hoofbeats on the straw covered floor advanced towards him, annoying him slightly. He resisted the urge to open his eyes, as that was just an unneeded invitation.

“Hey there,” came a voice he heard quite often. Not moving, he hoped that if he ignored it, the voice would move away.

It never did.

He felt a body move on top of him, and despite himself, he opened up his eyes. His sister Applejack was looming over him, observing each and every little move he made, like a giant bird of prey.

Still not making any sound, Big Macintosh stared back at his sister, looking over her as she did to him. The two stared in mutual observance for a few moments, before Applejack embraced her brother.

Big Mac opened his mouth to protest, but like the mostly silent giant he was, the stallion opted to keep his mouth shut. He knew what was coming next, and there was little that he could do to stop it. In all honesty, he had given up on fighting against his sister’s advances. To put it simply, he had become too bored and tired to keep struggling against her any longer.

His sister had her hooves wrapped around his upper back, and her head nuzzled underneath his. He could feel her breathing on his sweaty coat, the exhales cooling him down somewhat. Big Macintosh took no comfort in this, for he knew what was going to happen next.

Applejack kissed the nape of his neck, and slowly worked her way up to his mouth. She never spoke during these little sessions of hers; she honestly didn’t need to. All the speaking that ever needed to be done was through her actions.

Kissing her brother on the mouth, Applejack opened Big Mac’s mouth with her tongue. There was no resistance from him, it just... fell open a bit, and let her enter.

Applejack kissed with a bit more force, letting her lips wrap into the stallion’s below her. Big Mac decided to remain unresponsive to this, ignoring any attempt that his sister would try and make to get him to to respond to this.

Applejack pulled away from the kiss, gazing at her brother in a sort of scrying way. Big Mac gave her the same unamused expression that he had been giving her the entire time, determined to keep himself from giving the mare anything to work with.

Even though this was the countless time Applejack had come to engage Big Macintosh, she was still rather... clunky, was really the only word for it. Big Mac was not like a normal stallion, who would be able to jump onto a mare and get on with the act. He wanted a bit of foreplay, a bit of buildup. He might have even tolerated the fact that it was his sister doing this to him if she was less mechanical about the whole affair. But Applejack was a stubborn pony, and Big Mac was a quiet one, and through this mutual collaboration, the act remained lackluster.

Applejack slid down her brother, reaching the prize she had in her eyes. To Big Macintosh’s credit, he had remained unaroused the entire time, his cock remaining flaccid throughout Applejack’s attempts. She smiled a sort of annoyed little smile, and took the penis in her hooves, wiggling it and moving it about to get the blood flowing.

Big Mac couldn’t stave off the inevitability forever, and sure enough, his shaft began to harden at the movements made by his sibling. Soon, it was at it’s full length and girth, throbbing slightly with each heartbeat. Up above, his expression remained ever the same: simply bored and blank.

Applejack took a good look at her brother’s erection, as she seemed to want to take a good look at everything. It was sizable, but Applejack couldn’t accurately gage that as it was one of the only one she had seen; but, she could tell it was big enough.

She took to it as she had done in the past; she started with licking it. She always started with licking it. Pressing her tongue to the shaft near the bottom, she brought it slowly up the length of Big Macintosh’s penis, making him shudder involuntarily.

She took her tongue off of it once she reached the top. Wetting her lips quickly, she took another good lick to the side of the penis, this time at the head. With a small shudder, Big Mac felt a bit of pre-cum dabble the flat of his penis. Even somepony so stoically attempting to avoid action, he couldn’t stop the stimulation from getting a reaction from his body. He could only hope to mute it.

Applejack was pleased by this reaction. She knew that she had scared a victory, and was ready to go in for the kill. Moistening her lips again, she pressed them to the tip of his cock in a sort of half kiss. But instead of pulling away like one would in a kiss, she opened her mouth and stretched her lips around the top of her brother’s phallus. Pre-cum dripped onto her tongue as she did so.

She pushed her head over the cock, leaving her tongue sticking out so that it could hug the shaft as she took it into her mouth. The first quarter went in without a hitch.

Looking up at her brother, Applejack saw that he continued to gaze forward with no sign of any reaction. She could feel veins moving over her tongue, and the inside of her mouth vibrated ever so slightly with ever throb that occurred whenever Big Macintosh’s heart pumped more blood to the erection. She was halfway down now.

Closing her eyes, bracing for the next inches of the length, she took another push down. Big Mac twitched a bit, but for the most part remained as unresponsive as ever. A bead of sweat appeared on his brow as the third quarter disappeared into Applejack’s mouth.

Applejack thrust her head forward once more, and opened her eyes. A tear had formed in the corner of her eye from the suppression of her gag reflexes, and she was now working on the air she had kept in her lungs from before, as the shaft blocked off access to her lungs. Her muzzle was pressed into the space right above her brother’s crotch, scrunched somewhat. She had taken the whole thing down to the base

Her tongue was still stuck out, now resting on Big Mac’s balls. She gave a small lick, and Big Mac’s eye widened. He quickly returned to his normal expression, but many other beads of sweat had appeared on his body, mingling with the old sweat from his work earlier out in the orchard. Applejack would have smiled if her mouth hadn’t been full of cock; she had found a way to get a response out of her sibling.

She could only hold her breath for so long, but as a very athletic pony, she could hold her breath for longer than most. Applejack gave a few more laps to Big Macintosh’s balls, prompting more grunts and shivers from him. His resolved was too weakened to continue his facade; he would crumble now.

She swallowed around the shaft a few times to make her throat constrict. Big Mac exhaled heavily as she did so, his breathing becoming somewhat more labored. Applejack gave one final, drawn out lick to his balls, and knew that she had won.

Big Macintosh grunted, and his cock gave a heavy throb inside his sister’s throat. His cock shuddered, and his ball constricted. The pressure that had been building from the stimulation released as he orgasmed, sending three spurts of thick cum inside Applejack’s throat. He pushed on his sibling’s head to remove her from his shaft, the rubbing coaxing one more jet of cum to shoot out of his cock.

Applejack closed her eyes, wearing of a face of uttermost contentment. She swallowed the load with a single gulp. Looking at her brother with bedroom eyes, she put her hooves on his shoulders and hoisted herself onto his lap. Big Macintosh felt her wet, warm sex rub onto his groin as she did so.

He had to draw the line. He knew where she wanted to go with this. Generally, she rubbed herself while sucking him off, or dragged him into a sixty-nine so that the acts never got past oral; but he could tell that she wanted to go a bit further this time.

Big Macintosh braced himself as his sister moved her muzzle to his ear. “Ah love you,” she whispered in a sultry tone. Big Mac said nothing, prepared to retaliate if she went where he thought she was going to go.

She gave him another deep kiss, tongue exploring the inside of his mouth. He did not move his tongue, even when Applejack prodded it with her own. She grew tired of the one sided kiss quickly, and she moved her hoof down to his shaft.

“Nnope,” Big Mac said suddenly, startling Applejack so much that she nearly fell backwards off of her brother. She might as well have, for Big Mac picked her up and dropped her onto the barn floor. He hoped to his hooves, and trotted to the door.

“What are you doing?” Applejack called after him. Big Macintosh didn’t respond, and simply left. He had had enough.

“Hehe! Winona, stop!” Apple Bloom giggled as the Apple family dog relentlessly licked and slobbered all over the filly’s face. The little foal jumped in for a counterattack, rubbling the stomach of the dog relentlessly.

Winona barked happily as the two rolled in the grass and played around with each other. Apple Bloom laughed happily, content with this waste of time on the lazy afternoon.

She heard the loud noise of a bar door slamming, and she looked up from her tumbling around with Winona. The source of the noise had been her brother, who was storming out of the barn, looking very angry.

Apple Bloom looked over at Winona. “Sorry girl, Ah gotta see what’s gotten Big Mac all flustered. Ah’ll be back soon to play with you.” Winona wined for a moment, but bounded off as Apple Bloom trotted quickly over to Big Mac.

“What’s wrong, Big Mac?”

Big Macintosh looked over to see his littlest sister, Apple Bloom. She gazed up at him with sweet eyes and a genuine look of concern on her face.

“It’s.. it’s nothin’, Apple Bloom. You needn’t worry about it.”

Apple Bloom frowned. “Aw, c’mon! You always say that! Really, what happened?”

Big Macintosh sighed. He might be able to give her an alternate version. “Well, me and your sister had a little argument. That’s all, Apple Bloom.”

Apple Bloom whistled. “Musta been some fight. What were y’all fightin’ about?”

“That’s none of your concern, little sis,” Big Mac said, batting her bow a bit. “Now run along. Why don’t you play with Winona, or one of your friends?”

“Ah was already playing with Winona, and Ah’m too curios now to go back!” Apple Bloom furrowed her brow in thought and rubbed her chin with a hoof. “Although... Ah bet with the rest of the crusaders, we could find out what you and AJ were arguin’ about! We could be the ‘Cutie Mark Secret Uncoverers’!”

Big Mac’s eyes widened in terror. “No need for that! Can’t you, um...”

Apple Bloom slid up to Big Mac and batted her eyes in an overly-cute way. “If you’d just tell me, I’d go on my way...”

Big Macintosh groaned. “It’s really none of your business, Apple Bloom...”

Apple Bloom jumped up and hung off of Big Mac’s neck. The stallion grimaced and gasped for air as Apple Bloom continued to beg him about the information.

“Please can you tell me? Ah won’t tell anypony else I promise! Ah’ll keep it to myself, I swear! Please please please...”

“Apple Bloom! Air!” Big Mac gasped, and Apple Bloom fell off of his neck, popping back up the instant she hit the ground.

“Alright, now that you can breath, will you tell me?”

Big Mac sighed. “D’yah promise to keep quiet about it?”

Apple Bloom nodded eagerly. Just as her brother was about to make something up, an idea began to form in his head. It wasn’t a proud idea, not a proud idea at all. It would serve a purpose for him though, and technically, he wouldn’t be lying to Apple Bloom if he worded it that way...

“Well, your sister was being a bit... bossy,” he told her. Apple Bloom raised an eyebrow.

“Well, Ah know she can get stubborn, but bossy? Doesn’t sound all that much like her...”

“She’s not bossy often, but sometimes she can get a mite controllin’ of me. Makes me feel a bit helpless.” Big Mac stared down at his hooves, moving them around in the dirt. Was he honestly going to go through with this?

“So y’all were fightin’ over that?”

Big Macintosh nodded. “Eeyup. But you can help!”

Apple Bloom perked right up, a giant smile dawning on her face. “Ah can‽”

“You sure can,” Big Mac said, sitting down and ruffling his sister’s mane. “You just gotta do as Ah instruct.”

Apple Bloom sat down next to her brother, ready to comply with whatever he asked. As a young stallion, Big Mac was able to recover from orgasm quickly and be ready for more sex after a very short time. Since Applejack had made him feel so helpless and tired, he needed a situation where he had the control, and Apple Bloom was going to be the one who would give it to him.

Big Macintosh leaned back, displaying his reproductive organs. “Ah just need you to lick around down there, alright?”

Apple Bloom looked up at him, confused. “Everypony always told me not to touch other ponies down there, though...”

“Ah’m givin’ you permission, so it’s okay this time,” Big Mac explained. “You know what a penis is, right?”

Apple Bloom rolled her eyes. “I’m not a little foal, Big Mac, Ah’ve lived on a farm long enough to know what’s goin’ on down there. But Ah don’t know why you want me to lick down there!”

“It’s gonna make me feel very good, Apple Bloom. It’ll help me forget about the whole argument with Applejack.”

Apple Bloom sighed and looked at the growing phallus. “Well, if it’ll help...” She closed her eyes, and took a quick lick of the shaft. Opening her eyes, she took another lick. “Well, that ain’t so bad!”

“Ah told you,” Big Mac said with a smile. “Now, just keep licking it until it gets real hard...”

Apple Bloom did so, licking in small little laps, fast and soft. Her tongue shot around the shaft of her brother in an inexperienced way, but in an arousing way nonetheless. Big Mac groaned in pleasure, and Apple Bloom looked up at Big Mac hopefully. Taking a short break, she asked, “Am I doing good?”

“You’re doing great,” Big Mac said in encouragement. “In fact...” He sat up and smiled down at the little foal. “Ah think it’s time for the next part...”

“Already? Ah’ve barely done any lickin’...” Apple Bloom said in a somewhat confused tone, but Big Mac had already picked her up and brought her to his chest. The older pony spread her legs, exposing her nethers to him. Apple Bloom’s chest was pressed into his, and she looked down with an odd expression on her face, somewhere in between wonderment and frightenment.

He brought his throbbing erection to her moist vagina, and slowly pushing inside. Apple Bloom gasped as the large phallus stretched her out a bit. Big Macintosh thrust inside her, and she gasped again. It felt somewhat good... but it was mostly just a weird stinging, pushing sensation.

Big Mac thrust in once more, moaning as he violated his sister. Apple Bloom squeaked as he thrust once more into his sister, his erection throbbing inside of her. Pushing deeper and harder, he felt a little pressure on his own stomach, and upon looking down to investigate, could see that it was a bulge that he was creating inside Apple Bloom with his own cock.

Apple Bloom was really past the enjoyment part of this ordeal. It just felt really bizarre, and even hurt a bit. The stretching in particular. She expected it to hurt way more, after all, it was creating a bulge in her body! But it was more of numb sensation... with occasional jabs of pain.

Big Mac grunted as he bottomed out inside of his little filly of a sister, and prepared to unload his semen into her young, supple body. He swtiched to small little thrusts, and was edging himself closer to orgasm with each movement. However, before he could finally cum, he heard a very distressed voice.

“Big Mac? What’re you doin’ to Apple Bloom?”

Big Mac’s eyes widened in fear. Applejack was trotting very quickly over to them. He knew that he was in a heap of trouble now. Guess that’s what I get for doin’ this out in the open... Big Mac thought to himself. He slid out of Applebloom, and set her on the ground, turning to face his sister to explain the situation.

“Look, sis, Ah—”

“Ah don’t want to hear it! How can you just go around doin’ that with Apple Bloom when you don’t even bat an eyelash at my attempts!”

Big Mac was speechless. She wasn’t upset because Apple Bloom was a filly, but because... he’d rather do it with Apple Bloom than her? This made things a whole lot easier for him.

“Well, maybe if you’d have asked any time you decided to fool around with me instead of just jumping into it!” he retaliated, causing Applejack to give him a look of shock.

“You never talk about anything! You’re always such a stallion of actions that Ah figured you’d appreciate it if I just went ahead and did it!”

“Oh, and you didn’t suspect somethin’ was wrong when Ah didn’t respond to anythin’ you were doin’?”

“How was Ah supposed to know? You gotta use your words sometimes, Mac! You don’t talk nearly as much as you should, that’s for sure...”

“Is this what y’all were fightin’ about earlier?” Apple Bloom interjected.

Big Mac and Applejack exchanged glances. “Yes, it was,” Applejack said, shooting an angry look at her brother. “Not sure how much he told you, since he never talks...”

“Wait, were you doin’ what he was doin’ with me?” the curious filly asked again. Both of the older ponies nodded. “Well, can’t we all do it together? Ah mean, it felt a bit weird what Mac did, and it was a bit painful, but Ah sorta liked it! It was weird and new, but it was kinda fun!”

Once more, Applejack and Big Macintosh exchanged glances. “Well, Ah guess...” Applejack said. “But let me handle you. Big Mac’s a bit too big as of right now, which is why it didn’t feel as good as it shoulda.”

“What’s Big Mac gonna do then?” asked Apple Bloom.

“Oh, Ah’m sure Ah can think of somethin’ for him to do,” she said shrewdly, bending down and shaking her backend at Big Mac. Big Macintosh’s erection had died down from the scare and the shouting match, but at this, it began to rise again.

Applejack was bent over Apple Bloom, who was spreading her legs in front of her sister’s face. “Now, Apple Bloom, Ah’m gonna give you a much better time than Big Mac. It’ll feel funny, but it’s gonna be a good sort of funny.”

She buried her muzzle in Apple Bloom’s mound, nipping a bit at the outer lips of her sister’s vagina. Moving towards the clit, she licked around, making Apple Bloom sigh and twitch in pleasure. “Oh gosh, sis...”

Big Mac, meanwhile, was attending to the back. Mounting Applejack, he set his erection right into her snatch, and thrust forward. His rock hard cock was building up to the pressure that it was at before, his hooves on either side of Applejack’s body as he thrust in rhythmic timing. Applejack lifted her head up from Apple Bloom’s crotch, a trail of vag juice dribbling down her lip, and moaned as her brother continued to pound away relentlessly.

“Oh my GOOOOOOSH!” came a voice quite suddenly. The three Apples looked up into the tree where the sound was coming from, and very suddenly they were showered in a burst of fluid, and out of the tree fell a familiar blue pegasus.

“Hey, guys,” Rainbow Dash said, rubbing her head where she fell. “How’s it hanging?”

“Rainbow! How long were you there for?” Applejack asked, somewhat exasperated.

“Pretty much since Big Mac decided to get it on with Apple Bloom,” Rainbow Dash said with a shrug. “Well, I did get a glimpse of you guys going at it in the barn, but Big Mac wasn’t doing anything, so I got bored.”

Big Macintosh licked a glob of the fluid that landed on his muzzle. Looking over at Dash, he asked, “Were you masturbatin’ up in the tree?”

Rainbow Dash rolled her eyes. “Well, duh...”

Applejack wiped some from her face. “Jeez, Rainbow, you sure came a lot. Ah don’t get anywhere NEAR that much...”

“I’m a pegasus. We’re really familiar with weather and stuff like that. Most of our bodily fluids end up like a rain whenever they come spurting out of us. Cool for cum, annoying for piss, and hazardous when we get cut.” Rainbow Dash smiled saucily. “Hey, you guys need another mare? I’m still ready to—”

“NO!” All three of them shouted at once, and Rainbow Dash flew away, grumbling.

“Whatever, I’ll find somepony else.”

“You ain’t gonna get anypony else at this hour!” Applejack yelled, pointing at the sinking sun.

“I’ll show you!” shouted back Rainbow Dash.

Now that Rainbow Dash was gone, the three could return to their debauchery. Big Mac had been inside Applejack the whole time Rainbow Dash was talking, so not much was needed for him to go back to thrusting inside his sister.

Applejack simply returned to Apple Bloom’s nethers, moving to work on her clit. She flicked it with her tongue, causing Apple Bloom to blush and kick her leg a bit at the stimulation. Applejack looked up at her sister with loving eyes, and then began to suck on her clit.

Big Macintosh was now thrusting as fast as he could, as hard as he could. He was pounding awya like there was now tomorrow, he balls smacking against his sister’s underside as he continued to fuck her. His thrusting was so powerful that it was forcing Applejack’s muzzle deeper into Apple Bloom’s snatch.

Then, in a glorious coincidence that only occurred once every three clopfics, the three of them came at the same time. Big Macintosh filled his sister up, semen pumping into her and leaking out of her pussy around his phallus. At the same time, Applejack shivered as she came, clear juices mixing in with Big Mac’s pearly cum. Apple Bloom came two small spurts, which landed on Applejack’s muzzle rather messily.

Big Mac slipped out of his sister, and the three ponies lay next to each other on the ground, panting, covered in sweat and other bodily fluids. The three just lay there for a while, not speaking, just basking in the amazing afterglow of their incestious threeway.

After a few long moments, the three of them slowly got to their hooves, and ambled back towards the farmhouse together to head inside for dinner. However, before they could go inside, they were stopped by Rainbow Dash, who burst out of the door, face covered in clear liquid and a giant smile plastered across her mug.

“Hah! I told you I’d find somepony else!”

Applejack looked surprised. “Who’d you fi—”

“Wooh wee, I tells yah, that gal knows her stuff!” yelled Granny Smith from living room, covering herself with her blanket as she got into her rocking char, but not before everypony got a nice look of her dripping rear end.

“Excuse me,” Applejack said as she dodged into a nearby bushed and started dry heaving. Big Mac and Apple Bloom just stared on in surprise, shock disgust, and horror.

Rainbow Dash’s smile grew wider.