FSE

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This story can also be found at...

FurAffinity - https://www.furaffinity.net/view/33888335/

FiMFiction -https://www.fimfiction.net/story/438193/

---

"Applejack, what does "Incest" mean?"

Applejack wheeled around, blushing a little as she stared down at her little sister with wide eyes, "Now where did you hear a word like that?"

"There were these flyers posted around town talking about it." Applebloom held up a flyer with various pictures of happy ponies and all sorts of details written out.

"What??" she exclaimed, "Lemme see that!"

Applebloom hoofed her the flyer, and she read it, eyes widening even more.

"April Sibling Incest Contest!" it declared in bright, yellow, happy lettering at the top. "Over 3000 bits in prizes! 25 bits guaranteed for every entry!"

"Ah was thinkin, since we're siblings, if it was somethin' we could do ta'gether, we should go ahead and do it!" Applebloom smiled.

Applejack looked at her long and hard, thinking of how exactly to phrase her response. "Sorry sis, but yer a bit too young fer this sorta thing." she said with a wince, "Ah'd rather not have ta explain it to ya, and ah'm certainly not comfortable with doin' it with ya..."

"Aww.." Applebloom deflated.

"...Our brother, however..."

Big Mac's jaw dropped from where he'd been sitting and listening. He couldn't believe what he'd just heard come out of Applejack's mouth, and waited for them to say something else just in case he was wrong.

"Hay Big Mac!" Applebloom asked cheerfully, "Ya wanna do the incest with Applejack?"

"Yeah, big brother!" Applejack took a step towards him, "Whaddaya say!"

Holy shit. This crazy family. He he had heard her right, even if he still didn't believe it. "Eeenope!" he said firmly.

"Aw, come on Big Mac! It's just fer the entry reward! Twenny-Five bits is a lot of money!"

"No, it's not, an even if it was, ah wouldn' wanna do it fer a hunnid!"

"Why are you so hung up over it? You and ah have never done it before, ain't ya at least curious?" Applejack insisted, "Ah'm sure it'll at least be fun!"

"Yeah, Big Mac!" Applebloom protested, "Ain't it at least worth Twenny-Five bits?"

"Nope. We're not doin' it." he said, crossing his forelegs.

"What ain't y'all doin' fer Twenny-Five bits?" Granny called out as she wandered in.

Big Mac's eyes darted to the doorway, a blush appearing on his face, "Nothi-"

"They're gonna do some incest fer this contest!" Applebloom chirped loudly, holding out the flyer for Granny Smith, "Twenny-Five bits, guaranteed!"

It was Applejack's turn to blush for a moment.

"Lemme see that..." Grammy Smith said, taking the flyer and looking it over. "Well... Twenny Five bits is a lot of money..."

"It's less than a week's worth of groceries." Big Mac deadpanned.

"And groceries don't pay fer themselves now do they?" she pointed out.

"She's mah sister." he insisted.

"Aw, bein family didn' stop yer great granpa from gettin' busy with mah momma, an' they was second cousins!" She leaned over and gave him a firm slap, right on the ass, causing him to jump a little, "Yer a big stud! It's about time ya put out for some mare! Now y'all git er done!"

"Yeah Big Mac!" Applebloom cheered, "Be a stud! Do the incest with Applejack!"

Big Mac gritted his teeth. It was three on one, and they'd all set their minds on it. This was insane, stupid, and honestly read like some contrived plot from a porno. With a final sigh, he reluctantly agreed, "Fine. But we're doin' it in yer bed..." he narrowed his eyes at Applejack.

"Fine bah me!" she chirped with a wide grin.

"Woohoo!" Applebloom cheered, bouncing up in the air, "Ah'll get the movie camera!"

"Can ah join in? Ah wanna do the incest too!"

Big Mac shuddered, a cringe forming on his face: it was bad enough that he was doing this with AJ without their baby sister's naive desire to join in.

Fortunately for him, Applejack shut that down, "No can do Applebloom. This is adult pony stuff. Ah don't even want ya watchin' us."

"Aw, why can't ah?" she protested, "Ah'm a grown mare with a cutie mark an everything!"

Applejack shook her head, "Enope! Yer mah baby sister right now, and ah ain't ready to even explain ta ya what we're about ta do, let alone let you watch."

"But Applejack, who's gonna operate the camera?" she asked, holding it up and pointing to the crank on the side.

Applejack hesitated. She hadn't thought about that. Somepony needed to turn the crank on the camera, but Granny Smith's arthritis was too advanced for her to do anything like that, and she wasn't about to go all the way into town to get one of her friends to do it for her. Applebloom was the only pony who could do it.

"Fine," she finally said, "Ya can be in the room ta operate the camera, but only on one condition. No matter what ya hear, no matter what happens, ya can't look at us. Yer gonna face the door and focus on yer crankin', and yer not gonna ask us ta explain what we're doin' or see any of it."

"But Applejaaack..."

Applejack shook her head resolutely, "No buts about it. Yer either not lookin', or we're not doin' this."

Applebloom sighed, hanging her head, "Fine. Ah won't look at ya." She really wanted to find out what this whole "incest" thing was all about, but she wasn't about to risk her family getting 25 bits over it...

---

"Okay! Rolling in three, two, one... Incest!" Applebloom cheered, and with that, she started cranking.

Applejack had positioned the camera, and was now lying splayed out on the bed, smiling up at her brother, her hind legs spread wide to fully expose her old-country honeypot.

Big Mac, for his part, had a slight scowl on his face as he looked down at her, his stallionhood uncomfortably close to her labia, actually brushing up against the top of it when he shifted the wrong way. It wasn't like they'd never had a good look at each other's genitals. They'd bathed together, helped each other wash down there, he'd even poked her down there with an unwanted boner on accident a few times. They'd laughed it off, because that just happens when you live and work in close quarters for so long, and it had never meant anything. He'd never once seriously considered having sex with her.

"Ah can't believe ah'm actually doin' this..." He groaned, reaching a hoof into his mane and digging around for a moment before giving an annoyed sigh, "Ah'm outta condoms, ya got any?"

She shook her head, "Sorry. Ah don't think we got any in the house."

He shrugged, a bit of hope coming into his night, "Well, then ah guess we gotta hold off until I can go buy one."

"That's not gonna work.." she said, pulling the flyer over to point at a date, "The rules say we gotta send it in by tomorrow, and all the stores are closed fer the night."

"What?" he exclaimed aghast, "Yer sayin' ah gotta go in bare?!"

"Don't worry, ah'm clean." she reassured him, placing a hoof on his shoulder.

"Uh... Ah'm not worried about that." he winced, "Ah mean... Yer on birth control, right?"

Applejack cringed, looking away, "Well, no... but..."

"AJ... Is this really the safest time of year ta be doin' that?" he lowered his head to give a sniff to her bed, "It don't smell like the safest time of year."

Applejack blushed at that, "Don't you go smellin' my bedspread!"

"Says the mare try'na get 'er brother ta mate 'er while she's in heat." he snorted a little, keeping calm, "Listen AJ, I dun wanna risk givin' ya a foal jus' fer a few bits."

"Y'all quit worryin' about it." she scoffed, "I'll handle all that mahself."

"Are you two doin' the incest yet?" Applebloom said, starting to glance over her shoulder.

"No! Keep yer back turned!" Applejack snapped.

"Okay Okay!" Applebloom rolled her eyes, getting back to cranking. She didn't know what this 'incest' thing was, but her sister was acting even more defensive about it than she had when she'd asked where foals came from!

Applejack turned back to her brother, "Listen... Y'all let me worry about that, and you just worry about givin' me a good buckin'. Gotta make it nice and sexy for the contest..." she nodded at the camera.

Big mac cringed in hesitation, "Ah'm... Ah'm gonna pull out when ah finish." he said, resolutely, "The flyer don't say nothin' about pullin' out, do it?"

Applejack sighed and rolled her eyes, "Naw, ah guess it doesn't."

"Well then, that's what ah'm gonna do." he declared, "That's what ponies like in pornos, right? They like it when the stallion pulls out and finishes all over the mare's belly?"

"Ah mean, that's gonna be hard to clean out..."

"AJ, yer the one who wanted ta do this so bad." he snorted, "Are we doin' this, or are ya gonna worry 'bout a lil' cum in yer fur?"

"Oh, we're doin' this alright!" She insisted, "In fact, the sooner the better!"

"Fine," he deadpanned, "Let's get 'er done then." He rolled back his hips, unceremoniously lining up in a single motion, his bare tip spreading her wet labia slightly, lined up straight with her vaginal canal.

She whimpered a little, the full force of what they were about to do dawning on her. She could feel just how wide that thing was, and her instincts told her this was gonna be a stretch. "Ohh Celestia..." she gulped, "Ah heard ya were big but..."

"Yeah... Ah know. Ah'm gonna have ta push it in and leave it for a while so ya can get used to the size before ah actually get down to it."

"...Tain't gonna hurt, is it?"

"Most mares tell me it only hurts fer a lil' bit, and not bad, just stretchin'. Cept Sugar Belle. Ah was her first, and she'd never..." He narrowed his eyes as something clicked with him, "Wait... Ya ain't ever told me nothin' 'bout yer coltfriends in the past. This ain't yer first time is it?"

"...Why's 'at matter?"

"AJ, a stallion shouldn't be his lil' sister's first time. Ah dun think ah should have ta explain that to ya."

Applejack rolled her eyes, "Nah, yer not my first romp. Pinkie was."

Big Mac raised a brow.

"This was before we knew we were cousins, ok?" she looked away, "Still not sure 'bout that either."

"Even still, AJ, Pinkie's a mare." he said, "Have ya ever had a stallion in there before?"

"Uh... Yeah!" she said uncomfortably, "More 'n a few, actually! Ah, uh, just didn' wanna tell ya on account of bein' yer lil' sister an' all!"

"Uh huh..." he said doubtfully, "Can ya name one?"

"A lady don't tell that!" she snapped, "Now are y'all gonna keep askin' fer mah sexual history, or are we gonna get down ta gettin busy?"

Big Mac gave her a long hard look, which caused her to slowly cringe and sweat. "Fine." he finally said, "Jus' dun tell me ya regret this later, okay? Ah'm only doin' this because yer' insistin' ah do..."

"No regrets!" she said, bracing herself in position, "Let's get 'er done!" she grinned up at her brother, "Ah'm ready when y'all are!"

Big Mac took a deep breath, "Alright then. Let's get this over with." With that, he gave a firm push forward with his hips, pushing the first couple inches of his cock inside of her, spreading the now-dripping folds of her labia, and feeling a momentary resistance just before he entered her vagina, which broke as quickly as it came.

Applejack let out a shriek of pain, whimpering as tears started to form in her eyes, "Ah... Shit!"

Big Mac's eyes widened, all semblance of annoyance evaporating in a flash. He pulled out a little, "What's wrong? Ah didn' hurt ya, did ah? Should ah... Should ah stop?"

She shivered, whimpering against him, "Ah lied..."

"Lied about what?"

"Ah aint never... Ah ain't never had no stallion up there before..."

"...So... ah just..."

"Y-yeh, ya just popped mah cherry." She closed her eyes, gritting her teeth as she buried her face in his neck, "It just... It hurts a heap more 'n I thought it would."

He held her tenderly, stroking her back, "Do ya want to stop?"

"Jus... hold me for a minute..." she said quietly, "It makes me feel safe."

Big Mac did just that, holding her in silence for a few moments, comforting her as she breathed deeply, slowly relaxing her body, the pain fading away. He didn't say anything. He knew better. He just held her, letting her get through the pain at her own pace.

In a way, he was glad it was him and not some other stallion. This way, he could be here to comfort her during this moment of her life.

Finally, she spoke, murmuring through the tears, "Ahm sorry..."

"It's ok."

"No... it's not ok." she pulled her face away from his neck, looking him in the eyes with a sniffle, "Ah love ya big brother. Sorry fer pushin' ya inta doin' somethin' ya weren't too keen on, but ya know I love ya, right?"

"Ah... Ah love you too, AJ. Yer the best sister ah could ask fer."

Applejack looked away, "When ah... when you said y'all didn' wanna have a foal with me... are ya that bothered by it?"

"Ah... Ah jus' didn' wanna put ya through all that." He looked down at her, "Ah love ya AJ. Ah dun ever wanna hurt ya."

"Ah dun think ya could hurt me... Ah think..." she averted her eyes again, "Ah think ya'd make a great daddy."

"Ya... ya really think so?"

"Yeah... Ah know so. Ah don't think ah'll ever be able to hold down a relationship with a coltfriend. Jus'... too much goin' on, ya know? What with the farm and the world-savin' and the school. I guess I jus' thought... Maybe... This might be a chance fer me ta..."

The gears turned in Big Mac's head, but he was flabbergasted by what they turned out, "Yer... Yer sayin' ya actually want me ta get ya pregnant?"

She closed her eyes, "Ah'm sorry. It was a stupid fantasy."

"AJ..."

"Look, ya can go ahead and pull out. Ah don't want ya ta do somethin' yer not comfortable with, but... Ah just want ya ta know, ah know yer never gonna hurt me big brother." she smiled up at him, bittersweet. It was a smile so innocent, so pure, that he felt his heart melt for her all over again. "Yer never gonna hurt me 'cause yer the best big brother a silly pony like me could ask for."

Big mac stared into her eyes, those beautiful eyes which looked just like his father's. They used to hold each other, late at night, after their parents were gone, enjoying each other's scent, pretending their parents were still there. He'd never thought about her romantically, and even now, with his manhood lodged within her marehood, he didn't have any sexual attraction to her, but... He loved her. He loved her so much. She was his sister, and she was crazy to think that he was the best brother she could ask for, because she was the best sister he could ever ask for.

He didn't need to think any longer, his heart already knew what to do. Without another word, he pressed his lips against hers, openly, passionately, fully, as if she was the only mare in the world he could ever have eyes for.

Applejack let out a little yelp of surprise, but sure enough, she started kissing back, lovingly, hungrily, with a level of affection measured in years at her beloved brother's side.

Big Mac gave a gentle thrust, carefully pushing himself into her body once more. He gave another. Then another. And soon, he was pumping her in a soft rhythm, his shaft sliding in and out of his sister's vulva, her soft, slick, inner walls caressing his length.

Applejack broke away from the kiss to let out a whimpering cry of ecstasy, her moments of pain and tension forgotten as her brother gave her what she wanted, what she needed. Her first time with a proper stallion, the first time she'd ever felt what it was like to be truly entered and penetrated, to feel the full length of a male's pride within her confines, and all by her own brother, the stallion she loved more than any other stallion in the world. She wrapped her forelegs around him, leaning her head back as she began to moan, hind-legs kicking with every delicious thrust into her dripping cunt.

Big Mac grunted as he pressed his face to her neck, kissing and nipping at her, like a proper stallion. He'd done this with a few other mares before her, and he'd learned how to do it properly. The fact that it was his own sister only served to drive him even further, because Celestia damn it, if she was right, and she'd never get to experience this from another stallion in her life, then he was going to fuck her better than any stallion who ever laid eyes on her. To Tartarus with all of them! She deserved a stallion who gave her every bit of the love she deserved!

Applejack squealed like a school-filly beneath her huge older brother, hips rolling and rocking as the bed began to shake beneath them. She'd gotten used to his size and strength, and now, she couldn't get enough of it. She'd never imagined that being penetrated could feel so good, could send tingling up and down her spine like this, could drive that burning sensation within her loins, the heat she'd never been quite able to fully sate with her hoof, to glorious new heights. She dug into his hide with her hooves, mind overwhelmed with lustful desire for her brother, wordlessly begging him for more.

Big Mac was only happy to oblige. He repositioned his hooves on the bed and began to really pound her, her pooled up juices splattering through the fur of their crotches as his hips slammed into hers, his entire length sliding in and out of the deliciously tight, soft, receptive confines of his own sister's pussy. He couldn't help but grin as he continued to service her neck: he wasn't really thinking too hard about his own pleasure, though it was impossible to ignore at this point, but he was just so happy that Applejack was feeling the amount of pleasure he could hear in her voice, and he reveled in the knowledge that he was the stallion making her feel this way...

---

Applebloom felt sweat dripping down her forehead, both ears twisted back at the side of the room she'd been forbidden to look at. She heard the bed rocking, they weren't talking anymore, just making these weird noises, they sounded like fun noises too, like he was gleefully giving her the best back-rub of her life. Maybe that's what Incest was? A really really vigorous massage? But what was that wet noise? Was it oil? Was he using lots of oil on her??

She couldn't take it anymore! She had to know what this whole "Incest" thing was! Slowly, surreptitiously, she turned her head to get the slightest of peeks. The bed came her peripheral vision, and she could make out two forms moving atop it, a slight turn of her head a little further, and she saw her siblings doing the "incest", beholding it in it's full glory!!

She immediately regretted it.

She immediately regretted everything.

She wished to high tartarus that she could undo that decision, but it was too late.

She'd seen everything.

Sweet Celestia, had she seen everything, and there was no way to un-see it.

She wasn't really sure WHAT she'd seen, but her brother had been on top of her sister, her legs had been splayed out at 90 degree angles, straight out to her sides, and his colt parts... his penis had swollen up to some unholy size, and he'd been stabbing it, over and over and over, into her mare parts... her vagina. It had been stretched out from a line to a circle, sweet Celestia why, she didn't even know it could DO that! She shuddered at the thought of her own vagina being stretched like that, horrified by the prospect, but she couldn't get it out of her head. The worst part was, it had been dripping. Some sort of fluid, like sticky saliva or something, had been practically oozing out of it, pooling all over the sheets. She wasn't even sure if it was coming from him, her, or both of them together. She had no idea what that was about, but it was so GROSS, no wonder Big Mac had insisted they do this "incest" thing in her bed and not his. She wasn't even part of it, and she felt like she was going to gag.

She fought desperately to clear the image from her mind, but she was still in the room, and she could now connect every squeak of the bed with the violent thrusts of her brother's powerful hips, every gasping moan with that horrifying spreading of her sister's private place, every sickening squelch with that glistening fluid leaking from the connection between their bodies. She wanted to scream, to stop this unholy act, to run to the bathroom and puke out everything that was trying to escape her stomach, and run to the bedroom and hide under her bed for the rest of her life. She wanted to, oh how she desperately wanted to, but...

...She had to keep cranking the camera.

She swallowed hard, the vomit sliding back down her throat. "Twenny-Five Bits." she told herself in the quiet whimper of a filly who'd been traumatized for life, "Jus' get this over with, an' it's Twenny-Five bits..."

---

Big Mac's hips were working like a jackhammer now, pounding hard and fast into his little sister's cunt as if he were making whipped cream. (which, in a sense, he was) He growled into her neck with his exertion, ignoring the aching in his hips, restraining the burning in his cock: part of him wanted desperately to cum, but he wasn't ready to give in. Not until his sister got the satisfaction she deserved. He kept going, his grip tightening around her as he powered through the fatigue.

Applejack whinnied loudly beneath him, not even thinking to restrain her displays of enjoyment. She'd never imagined a stallion could put this much force into a mare, but it wasn't like she was really able to register it at this point.

Big Mac's eyes widened as he felt her start to stiffen and spasm beneath him. He could feel it in his cock, in the motions of her vaginal walls, just how close she was to climaxing. He redoubled his efforts, grinding his crotch against her clitoral hood, spreading her nice and wide as he rubbed his body against hers. He was going to give her the best damn orgasm she'd felt in her entire life.

Applejack was powerless to do anything but squeal and squirm beneath him, her back arching as she felt the breath drive itself from her lungs. Her face was screwed up in a ridiculous expression as she saw stars. She'd never cum before, but when she came to her senses and thought back to this very moment, she'd know what it felt like to downight squirt. Her hips bucked helplessly against the bed as she continued to take his cock, screaming and gasping for breath.

Big Mac felt pride swell within him as he felt his sister orgasm beneath him. The very knowledge that the mare he loved more than any other had just cum for him and him alone was enough to send him over the edge. He craned his neck back, grunting loudly as he felt his cock spasm within his sister's walls. He shoved in deep as he came, holding his base to her vulva, keeping it tightly against her so that none could leak out.

Applejack's eyes shot open, a deep blush forming as she watched him, she felt him, orgasming fully and without reservation, filling her fertile womb with his seed, even as her body shuddered violently with the last throes of her own passion. She'd been bred, bred by the most wonderful stallion she knew.

She'd been bred by her own brother. Her own amazing, wonderful brother.

She was the luckiest mare in the world.

He grunted, wincing as he thrust in again, trying to get every last drop in, even though his cock was begging him to be done with it. Finally, he collapsed, letting gravity keep his hips pressed tightly against his sister's, making sure his semen would stay inside of her, making sure her dream came true.

"Thank you... Big brother..." she said, kissing him on the forehead, internally squealing with delight from the fact that soon, she would have a loving father. She closed her eyes, letting out a sigh, body still twitching as he slowly went limp inside of her, just basking in the afterglow.

"Uhm... AJ?" Applebloom ventured timidly.

Applejack was awoken from her stupor, glancing up at her sister, who was still rigidly facing the door. She smiled: for once, her sister had been obedient and hadn't watched her. "Yeah Applebloom?"

"Are y'all done doin... the thing?" she asked, barely able to stop herself from curling up into a ball right then and there, "Ah... Ah think we're runnin' outta film and-"

"We're done sugarcube." she said, gently petting her brother's back as his penis twitched limply, still pressed inside her, "Ya can stop crankin' the camera and go. Jus' make sure ta close the door on the way out."

Applebloom nodded, trying to contain her revulsion. She wondered if she'd ever be able to look at her siblings the same way after seeing... She didn't even want to think about it! She was going to need so much explanation from Scootaloo after this...