The Autumn day had been long with lots of apple-bucking, and Big Macintosh was enjoying some well-deserved rest...or was trying to. He had no sooner tucked Apple Bloom, his school-aged little sister, into her own bed and crawled into bed himself before he heard his bedroom door creak open. There were only two ponies that might sneak into his room at night, and both for very different reasons. He knew which of the two this was when they made sure to lock his bedroom door behind them before approaching his bed. He knew now that wasn’t a little filly who was coming to his bed complaining about having a nightmare, then ask to sleep with him that night. It was a grown mare who was going to ask the same, but in a different, far more intimate way.

It was a good thing his visitor had gotten into the habit of locking the door; it had been very awkward for his nearly-nightly visitor to have to hide under the bed like she had that last time they were interrupted and nearly caught by Apple Bloom.

Mac rolled over and looked toward the door to see his other, adult-mare sister Applejack creeping onto his bed with the most bedroom of emerald-green eyes, an expression that said ‘I’m not thinking with my brain, I'm thinking with my pussy.’ His sister was a typical earth-pony mare after all; usually horny, her body always urging her to try to make foals even when she was out of heat.

“Ahm bit tired tonight, sis,” Mac muttered, “Ya know how applebuckin'—”

Applejack put an orange-coated hoof on his muzzle to quiet him, then slowly crawled beneath his covers beside him. He couldn’t help but take a deep breath of her scent, and quickly realized by the musky-earthy scent, alongside her usual sweet-smelling arousal, that she’d gone into her Autumn heat. That settled it; he wouldn’t be able to pry her out of his bed even if he wanted to until she was properly satisfied, while also telling him that this would be a hay of a pleasurable night.

“You c'n be as tired as ya want,” Applejack slid close, her body toned from years of hard farm-work feeling warm and soft against his own toned body, her slightly-rough hooves gently coaxing him onto his back, “Ya ain’t gotta do nothin’ but lay back and enjoy me doin' all th' work t'night. Ah know ya can smell Ahm in heat...Ah NEED ya bro. Deep inside'a me...” Applejack said in an intense whisper, her hoof reaching down to play with his already-swelling sheath.

After fondling him for a few seconds more, teasing him, Mac felt as his sister climbed atop and mounted him, her having to practically do the splits to get her hind legs around his larger frame, but he stopped her by grabbing around her toned flanks with his hooves. He wanted to at least getting a taste of her dripping pussy before the main event started. He grasped her plot in his red-coated front hooves, tugging her fragrant pussy toward his face. She got the idea and chuckled, leaning forward to balance against the headboard as she partially sat on his face instead with practiced ease, her swollen dark-brown vulva pressed to his muzzle. "Mmmm...wanna taste yer mare first huh? Ah don't mind..."

Either Applejack tasted better than ever, or he was hornier than he thought, because Mac rolled his eyes back from the first delicious drops of her estrus-pheromone-laden fluids on his tongue. He squeezed her rump as he pushed his muzzle against her, prying her labia apart with his muzzle and tongue as he ground his nose against her clit. She shivered and bit her lip so as to not moan too loudly, a muffled whimper getting out instead at the powerful tingle of pleasure that sent through her, her clit winking again.

Needless to say Mac's body responded well to her fertile scent and flavor – her clit winking to him, inviting him on instinct to mount her and breed her – only adding to his large sheath swelling rapidly before his flare escaped. Applejack swiveled, turning herself about on his head before leaning down to his crotch. He felt warm lips slip over his tip and that wonderful tongue starting to work over him as he was lapping out thick mare honey. She let his black-skinned shaft expand within her hot muzzle, holding her breath and swallowing as it reached her throat. She barely gagged as her neck expanded with his size, her nose meeting his retracted sheath and smelling his musk strongly from the source.

By Celestia Mac loved her throat.

It had taken Applejack a long time to be able to do this for him, given that he had the longest and thickest cock of any stallion he knew; a full fifteen inches long as well as four around, his medial ring another half-inch more, a heavy sack with very large, virile balls accompanying them. He’d actually had some interested mares change their mind when they saw him at full staff in the past, afraid that it’d hurt when he penetrated. In fact, Applejack was one of only two mares that had ever taken him fully within her to the hilt within her pussy or throat, and the other may have only let him because she was in such bliss that she was only capable of answering ‘mmmm’ when asked if she was okay with him going all the way in. He'd...never spoken to her again after that night.

Soon, Mac wasn’t satisfied with just her throat, as talented as she was with it, his instincts demanding more as his mind was saturated with her fertile scent. So, after he took one more lap of her flavorful mare-honey, he then coaxed her back downward. Applejack was happy to turn around to face him and sit her sopping wet slit against his saliva-covered shaft. At this point she hesitated; something she hadn’t done in a long time. She always just took him into herself, but not this time, instead sitting there looking down at him and blushing hotly.

“Uh, Mac,” Applejack whispered, “Ah...uh...Ah haven’t taken mah foal control this heat...” she said, with that also explaining to Mac why she tasted and smelled so much better than usual.

“Eenope?” Mac breathed heavily, barely able to stand the heat of her perfect pussy against his shaft as her pheromones wreaked havoc on his breeding instincts, "Y'outta them? Fergot it? Ah think Ah got condoms..."

“Nah, Ah didn’t ferget it,” Applejack interrupted, blushing more, “Ah was actually hopin’…we could jus'...not use protection this heat.”

Mac blinked. This wasn’t the first time his sister had indicated she wanted him to sire her a foal, as ridiculously taboo and illegal as that was, but it was the first time she’d gone through with not taking an ovulation prevention potion before coming to his bedroom to quell her heat with him. His muzzle hung open without responding, though Applejack generally knew what he was thinking with minimal communication, given they'd grown up together.

“Ah was thinkin’,” Applejack muttered, looking rather adorable when flushed with a tint of pink from head to hoof with embarrassment, “Ah could just say that our foal is jus' from a random stallion in town knockin' me up when Ah happened across him while in mah heat and that Ah had…agreed not to let anypony know who studded meh. Wouldn’t be a lie, right? Yer in this town, ya woulda studded me, and ya don’t want me to let anypony know...”

It was just like Applejack to spring this on Mac while he still had her powerful taste on his tongue and fertile scent in his muzzle, her pussy's lips slowly grinding against his sensitive medial ring, clit winking in need as she drooled her fertility-telling fluids onto his cock and large, sperm-filled balls. He knew that he definitely should say no...

“Eeyup, Ah wanna make a foal with ya.” Mac replied before realizing it, and now it Mac who was blushing, not that it was apparent with his red coat. He’d always wanted this as much as she did – to have a foal with his sister, his most beloved mare – but the problem was what other ponies would think, much less what their family or the authorities would do should they find out. They knew the punishments. Still, there was no reason for them to suspect Applejack or her brother of doing anything...incestuous, since they had always been very careful not to display their relations publicly.

Applejack rolled her hips smoothly against Mac at his acceptance, the only sounds in the room now the moist sliding of her lower lips against his pulsating length and their shallow breathing. Her thick juices were making a puddle on his lower belly, sliding off to pool onto his bed; saturating it with the scent of a mare in heat – his mare in heat – that he'd be sure to intimately enjoy each night he had it. Mac slid his hooves to her hips, feeling her powerful muscles tense with her movements before tugging her into place, his thick flare snugly at her entrance.

Applejack slowly slid herself down on Big Mac's rod and distinctly felt every bit of his thick fifteen inches as it slid into her ever so slowly. She loved the feeling, finding that, as every time they did this while she was in heat, his mere entrance into her slightly quelled the burning heat deep in her already; loved how he stretched her so wide as to be borderline painful.

"D–dang big brother, yer...so...biiiiiig!" Applejack moaned out quietly as she slid him ever-so-slowly into herself, teasing the big red stallion lying prone underneath her as well as herself with the super-slow descent. She saw his head press back into the pillow again, the feeling of her hot passage slowly, slowly sliding down his member again likely quite the sensation as it lazily encased him in its warm, tight confines once more.

Mac’s blood flooded with pleasure hormones as he felt the familiar heat and slickness of his lover's pliable in-heat entrance sliding down upon and surrounding his length, gliding over each bump, ridge, and vein as she slid him into her fertile passage. They fit flawlessly as Applejack passed his medial ring moments later, that extra girth only adding to the nearly-painful stretching. The law said this was wrong, that brothers and sisters weren't supposed to have sex together – not supposed to have foals together – but neither of them understood why. It always felt so perfect, as if his cock and her pussy were molded specifically for each other.

“Ah love you,” Applejack whispered, leaning forward and kissing him, her body encompassing him. Her pelvis finally pressed firmly against his some seconds later, her soft rump sitting gently upon his balls as she hilted him, his flare pressed firmly to her cervix.

“Ah love ya too, mah beautiful sis.” panted Mac in return. This was something he never abbreviated to ‘eeyep’. His beautiful sister deserved no less than to hear just how much he loved her and how beautiful she was to him, straddling him as she was with him deep within her. Promising to carry his foal.

Applejack then rolled her hips against Mac again, pulling up and down in a practiced rhythm, her slick lips flexing out as she pulled him outward and pushing inward when she pushed him back inside. As tired as he was, Mac couldn’t keep his hips from humping upwards against her on instinct in response, breathing heavily and enjoying another deep kiss with her, tongues playing together eagerly as they stared into each other's eyes. They didn’t break the kiss as Applejack continued to ride her brother like the bronco he was; it helped muffle their moans. As her passage clamped around his massive cock, thrusting up and down like a piston on him, the wet smacks of their flesh meeting echoed throughout the room now as her sopping crotch pounded against his.

For now there was nothing but one another to the siblings, the sounds of their increasingly moist pelvises smacking together, the lewd slurping suction of Big Mac's rod sliding out of Applejack's depths a sound so loud that it was a wonder that that alone didn’t wake up Apple Bloom in the next room. It was a good thing she was a very deep sleeper.

The only reason that Mac could hold his load for more than thirty seconds, with how perfectly Applejack's inner muscles were massaging him now, was because of how much practice he had with Applejack. His first time with her as teens during her first heat, he'd filled her with a heavy load of his adolescent cum within ten seconds of entering her heavenly canal.

Luckily, she didn't get pregnant that time, and they soon learned about contraceptive methods when Granny Smith gave them 'the talk' upon realizing Applejack was in her first estrus. Granny had made sure to emphasize the dangers of incest, as well as the consequence. It had turned out she didn't know they were still screwing behind the barn each night during her estrus, using condoms given away for free each breeding season in their class to prevent a foal, following an after-school trip for a contraceptive potion after that first day. Didn't know that they still were having sex nearly nightly to this day, or even sometimes multiple times throughout the day and night both during her fertile days.

Didn't know they were trying their damnedest to conceive an incest foal together right then.

Applejack was lucky to be a mare though, as she didn’t have to hold her orgasm in, nor could she have even if she had wanted to in her current hormonal state. Mac barely entered her for the twelfth time before her wet inner flesh was convulsing around him from base to swelling flare; milking him, her body desperate to wring out all the potent seed it could get from those heavy balls to make his foal with.

Mac couldn’t tell if his sister was having multiple intense orgasms in a chain, or if she hadn’t been able to stop the first one and was just riding it through the whole act, but all he felt was her constantly kneading him, and by Celestia did it feel good. The lack of foal control seemed to be making Applejack all the more spastic, sensitive, and needy, her body shaking with the effort to not squeal in delight save a few quiet squeaks that escaped into Mac's muzzle.

She hadn't actually had sex during a heat while the sensations were not mostly repressed with infertility potions or condoms in many years, and clearly her brain was having a hard time handling the raw, overwhelming feelings of being truly bred bareback that she hadn't experienced since their first time as foals. This time, she didn't have to worry about rushing to the general store for a 'morning after potion'. Mac's seed was there to stay, to take root and grow.

Applejack looked to be enjoying the feeling of Mac's thickness spreading her open while she clenched rapidly on him to the point that she was barely sentient, all she could feel being fullness, pleasure, and primal satisfaction. Not that Mac minded, as he was barely keeping coherent thoughts in his head himself, his hips rocking up against the tensed, shivering, cumming mare mounted on him.

Mac hammered his hips up at this point when she stopped humping back and tensed up in another orgasm, bouncing her against him, and slid his hooves from her hips down to her teats just above her slit, swollen due to her hormonal state, subtly feeling his own cock gently bulging through her belly with each thrust. He pushed against her and slid his hooftips in circles around her outer areola, enjoying how the spongy flesh gave at his touch, then rubbing into her diamond-hard nipples themselves, making her squeak and seeing as her eyes actually started tearing up from the intensity of the pleasure.

"M-Mac...I...I can't..." Applejack managed to whimper out as she pulled away from the kiss, only to ram her hips down and pin his to the bed for a moment as she clearly came again, her pussy muscles holding him in a death grip and her hips grinding against his as a fresh torrent of mare-cum flooded his cock and balls in her liquid pleasure.

Mac couldn’t stop thinking about how this beautiful flesh would feed their future foal with life-sustaining milk as he continued to rub her areola, and he himself was looking forward to getting to taste some mare milk of his own from the tap once she was lactating.

Mac started to get dizzy from the constant, pleasurably-milking furnace that he was trapped in, just letting his body move on instinct while he enjoyed the feeling of his sister cumming again and again as he humped up into her. Their muzzles were still pressed together and had never parted once save to speak, though it was impossible to play their tongues together since both of them had clenched their teeth in an effort to not scream their passion out. Their 'kissing' at the moment consisted mostly of their teeth crashing lightly together with each buck.

Mac arched his back to make his thrusts deeper, harder, every muscle tensing, pouring sweat so much that he was leaving an imprint in the sheet beneath him. Applejack was sweating just as much, and that's not to mention just how soaked the mattress and Mac's crotch was with Applejack's mare-honey and his own precum. His thrusts became uncontrolled and out of sync, just trying to keep up with the rapid slamming of his sister atop him.

“T-that’s it b-bro,” Applejack moaned quietly as she finally came off of her chain of eight orgasms, easily able to tell that he was about to give her fertile insides a coat of sticky white by just how thick his flare was growing within her and how saccadic his thrusts were, “Time t' buck yer little sis full'a our foal…oh Mac Ah've dreamed about this ever since Ah c'n remember. Cum in meh...make me a mama t' yer foal...”

This voice of his sister encouraging him to knock her up was easily the hottest thing Mac had ever heard, and he went over the edge harder than he ever had, his flare swelling up to its usual ludicrous size and making her groan in pleasure at the intense inner stretching, watching her belly's bulge swell a little more as he plugged her up for his soon-to-come load.

His balls tensed up and, after a few dry pulses, the first shot of his very virile seed burst from his shaft and forced him to press his head against the pillow even harder, then moaning loudly into Applejack's muzzle as the intense orgasmic pleasure it caused him slammed his mind. Big Mac just kept rocking his hips, pumping his proliferous load into his sister's foal-passage for what felt like forever; motivated to fill her fuller by the musky scent of her heat so prevalent in the room, her own pleasured moans, her gripping, kneading passage clenching and rippling around him as it claimed his foal. Cumming harder and more than ever before at the promise that this time he was actually going to breed her, his body clearly wanting to make sure it took.

Hours could have passed by in the time he felt her squeezing around his rod, his and her orgasms never seeming to end as she started to pump down on him even as she came again. Her muscles milked him, pulling everything she could from him, and what he had was a lot. He'd been saving up for her, it would seem.

Applejack meanwhile clenched down on his pulsing cock hard as she came again and again from the feeling of him planting his seed in her unprotected womb, determined to not let a single drop escape as she felt the thick, sticky warmth of his incestuous sperm flooding her depths. She actively felt each glob traveling up his cock before exploding deep within her belly as her powerful vaginal muscles milked his cock, knowing it was likely coating her uterus by the sheer depth it was going. "Ho'fuck...so much, so deep..." Applejack muttered, quivering as her brother dumped his nuts into her fertile womb.

Mac shook uncontrollably, but she didn’t stop slamming her body against him, making herself milk out every drop Mac had to offer, her whimpers seeming to go up an octave with each new blast. Her belly began to swell, more than it already was from his massive flare's girth at least, as he flooded her vaginal fornix. Said flare gave his cum nowhere to go but up, leaving not a single fold of her foal-oven not drenched in his foal-cream, some of his semen even reaching her Fallopian tubes, where a fertile egg waited for it.

Oh Celestia, he was really doing it, Applejack thought; he was finally breeding her! Her brother was the first stallion to get the privilege of making a new life with her; the first stallion to mark her as his mare and claim her womb for his foal. With that much cum so deep inside her while she was likely ovulating, she knew, it was impossible for her not to get pregnant!

Applejack's hips slowly ceased their rocking once Mac's balls had emptied themselves into her and his dick stopped throbbing, instead starting to go soft within her, its job well done shown by the large bulge of cum he'd left within her lower belly. As she lay against him for a moment, giving him another kiss as they cradled each other's heads, she pulled herself belly to belly with him as they let their perfectly fitted parts throb against one another. As Mac felt her semen-stuffed belly press to his, he already couldn’t wait to meet their foal, and to put another foal, then another, and more after, inside of her if this went well enough.

Their incestuous lust sated, they enjoyed a moment of looking into each other's eyes, nothing but pure love shining through for one another. Mac so wished she wasn’t his sister right now. He’d love to be able to kiss her in public or even rut her senseless in public places where it was allowed, like the park; to let everypony see just how much he loved his sister, and how perfectly they fit each other.

Applejack lay her head on his chest and sighed, clearly wanting to sleep with him still tightly fitted inside her, his flare keeping her womb plugged with all his seed until she was fertilized, but they couldn’t; it’d be too hard to explain why she was coming out of his bedroom the next morning and smelling of estrus, him, and sex. "Thank ya bro..." Applejack whispered after they'd shared one more kiss before she pulled off of him with a long, lewd slurp, a thick glob of his virile cum splatting onto his balls.

Reluctantly Applejack headed to the bathroom to clean up, her body shaking and his foal-batter still drooling down her thighs even as the occasional vaginal or uterine contraction did its best to keep his seed within her fertile core where it was needed. Where her foal was soon to be conceived.

~

It was a little over nine months into Applejack's pregnancy with her brother's foal and she couldn’t be happier about it, even if she couldn’t properly show it. Mac had successfully impregnated her during her heat that night, and that new life they'd made had been steadily growing within her, a perfectly healthy pregnancy through and through.

Everypony bought the story of Applejack simply not wanting to tell who her foal's sire was; having a foal out of wedlock was accepted and even expected in a society where fewer ponies bothered to marry than didn’t, and where mares outnumbered stallions six to one.

Applejack had tried to sleep with more stallions in town after she was sure she was fertilized and still had the aftershocks of her waning estrus, since previously she had done so far less than the average mare, wanting to support the idea that her foal belonged to 'just some stallion in town' as she allowed every one of them to finish inside of her without protection. She'd realized she probably should have started at least screwing stallions with protection before she'd gone into heat and Mac planted his seed matter of fact, but hindsight was twenty-twenty.

Applejack encouraged Mac to be more open to the mares jumping him and asking him to stud for them, to provide distraction from any idea that Applejack’s foal might be his if there were other mares carrying his foals already. He had done so, breeding and impregnating at least seven other mares at their request. Though Applejack had to admit it made her jealous, especially when she realized several of her best friends were having sex with him, and Fluttershy was even having a foal by him, she knew it was for the best. Starlight Glimmer had even recently complained to Applejack several months ago about the racket Twilight and Mac made the night before, also positive Princess Twilight was in heat during it.

Applejack wondered if she maybe shouldn’t have encouraged him so much, but didn’t want to seem possessive. Still, she felt the need to ensure that Mac remembered who his mare was, even if it was so far in her pregnancy to be doing this. She went into the orchard where he was working one day, with her being long forbidden to work until she'd foaled, so her presence was likely to be a surprise. She was sure Apple Bloom was off with her friends, and Granny never walked out this far into the orchard. The coast was clear, with the thick treetops preventing any pegusi from seeing them too.

Mac perked his ears when he heard Applejack approach, making her chuckle. No doubt he was worried about her walking so far in her condition.

“Ah’m okay,” Applejack said, “Just felt tha need ta mark mah territory is all. Make sure mah stallion remembers who his mare really is...”

Mac shifted a hoof a bit at her honesty, perhaps feeling awkward at the realization that she might be envious. Knowing him, he felt worse than he should. "Sorry 'bout all th other mares...and foals. It's jus', they were in heat, an' they asked me if I'd...y'know, give 'em one. Ya said to..."

“Don’t be that way, ya know it’s alright. Ah actually look forward t' seeing what kinda cute l'il foals ya gave them.” Applejack encouraged, indeed looking forward to seeing her little nieces and nephews, especially Fluttershy's foal. “Anyway, Ah want mah brother’s hot dick in me all the same. Jus'...be gentle. Don't want our little colt gettin' hurt.”

Applejack wobbled around to face her plot toward him, flagging her tail up to reveal both a moist slit and swollen teats, packed tightly behind that firm oblong belly where their foal currently resided.

Mac didn’t mount her immediately, instead stepping up and taking a deep breath of her sweet-as-ever arousal before sliding his head down. She expected him to take give her slit a good licking, but he went lower instead, pushing his lips against one of her nipples, slurping rather loudly and mm-ing a bit at the taste of her milk. Applejack smirked, wondering for how many months he’d wanted to do that.

Applejack then spread her legs, letting him get his fill of her teats' milk, and it definitely didn’t feel bad being sucked dry like that. At the same time Applejack was in a randy mood, so she politely grasped his neck in her tail and coaxed him upward after he drained her for a while. He chuckled at her eagerness, though still not mounting. He sat on his haunches and pulled her back to do the same, letting his sweaty chest set against her back and licking at one of her ears affectionately.

Applejack pushed her rump back until she felt his solid shaft against her pussy, Mac not wasting any time before sliding it until his flare was snug against her slit, then pulling her down immediately. She needed this, already as slick as if they had already had a half-hour's foreplay, and easily encompassed that thick girth within her, feeling the stretch that she could only get from him. None of the other stallions she'd slept with could even dream of comparing to her brother's, to her at least, perfect cock.

Applejack moaned, arching her body against her brother as he entered, not thinking her clearest as she tried to push back as deeply as she could. Mac had chosen the position, it seemed, to make it easier for him to control the depth of penetration, a credit to him for being very careful that her over-eagerness didn’t become a problem for their foal. All the same, he groaned, rolling his eyes back as he lay his muzzle against her shoulder, nuzzling softly.

Applejack slid her front hooves back as Mac held her, stroking over whatever part of his incredibly hot body she could reach. His hooves slid down to her breasts after hooking around her hips to stabilize her, rubbing into them, so plump and ready for their foal that they leaked milk even from the slightest pressure. He bathed one hoof in her milk before raising it to her lips and letting her lick it off. It was sweeter than she expected.

Soon their bodies were rolling together. Though the sound of the moist sliding wasn’t as loud outdoors, their moans were. It was rare that they didn’t have to stifle their moans; maybe they should do this out here more often, in the far orchard where nopony typically ventured. For once she let herself squeal in a pitch very unlike her, and Mac continued to lick at the back of her head, his own loud groans practically vibrating through her head.

They took it nice and slow, Big Mac backing off every time he felt her pussy tense up, as if making her stave off her orgasm as long as he could instead of the quickies they were usually forced to do, but Applejack didn’t mind. It would only feel better in the end if he denied her for a while.

For a while, Applejack just enjoyed her sibling's cock inside her, every familiar curve of his shaft stoking her flames. She knew that cock better than any other mare could; she’d felt it grow from a respectable length when he was a teenager, to the massive stallion tool that it was now, to its rapid throbbing as it had knocked her up nearly a year ago. Applejack wrapped her tail about her brother's hips, both to grasp and intertwine it with his own tail, and to feel the wonderful movement of him humping into her, loving how his powerful muscles tensed as they made love.

Shortly after, his shaft throbbed hard; Applejack could feel that Mac was nearing his peak as he flared up huge again, about to blast his incestuous load inside her as he had hundreds of times before as he spread her inmost passage wide. He sped up his thrusts, and she let herself go as well, gritting her teeth and clenching her eyes closed, but loosing a loud moan from her throat at the same time as her muscles started their rhythmic, orgasmic milking. Mac groaned as well as his shaft blasted into her convulsing hole, filling her whole passage and letting it run down both their thighs as it overflowed instead of going into her womb where it naturally belonged. After all, she was already quite full there as it was.

“Nggh, that’s mah sexy brother,” Applejack moaned, “Pump mah pussy full while yer foal kicks its cute little legs…make me cum again...”

Suddenly Big Mac stopped thrusting. Not the slow stopping they usually did before round two, but instantly stopped. Applejack looked behind her at him, realizing that he was looking off to the side into the bushes nearby. Following his line of sight, her heart sank as she saw her little sister Apple Bloom peaking out from behind a nearby tree, her eyes wider than Applejack had ever seen on her.

“Apple Bloom!” Applejack gasped, “This ain’t…well it is what it looks like, but let me explain!”

Of all the ponies to catch them, why did it have to be her little sister, the one pony who she couldn't talk logically to.

“Apple Bloom please,” panted Applejack, “c'n we just agree not ta tell? Ah...Ah really need ya not to tell!”

“That foal is…Big Mac's?!” Apple Bloom looked more sick from thinking about it, putting a hoof on her muzzle as her face turned a shade of green, “Applejack! Yer askin’ me ta lie!”

“No!” Applejack rationalized, realizing just how far up shit's creek they were now if Apple Bloom had heard what she'd just said too, “Just… don’t tell anypony 'bout this is all!”

“You told me that was lyin’ by...em-ission!” Apple Bloom shot back, and she was right. “This is gross, havin' a foal by yer brother! I’m tellin’ Twilight!”

Choosing Twilight meant that Apple Bloom didn’t simply think it gross, but also realized it was illegal. Her sister was about to turn them in to ‘the authorities' and fulfill their greatest fear, and Applejack was ashamed that her best friend was going to be told by her own little sister that she was fucking her brother and now carried his foal.

“Wait!” Applejack sighed, despair growing in her very soul at this being learned of...and the consequences that would follow that revelation, “At least let us go with you and explain....please!”

“I don’t even want to be around you, you disgusting freaks!” screamed Apple Bloom before running toward Ponyville towards Twilight's castle. Unknowingly sealing the fate of her siblings.

"Apple Bloom, wait, please! They're...they're gonna..." Big Mac shouted out with tears in his eyes before he started hyperventelating, a wail of emotional anguish escaping him. But Apple Bloom was already gone, leaving her siblings to only hug and kiss each other for possibly the final time, and ponder their now-inevitable fate.

Author's Note

So, the next chapter is my first time touching on anything dark in my public stories. Please lemme know how I did in the comments.