The Size of Tree Trunks

by Anaithnid

Rating: mature
Tags: Romance, Sex, Big Macintosh, Slice of Life, Babs Seed, Anthro, Applejack, Apple Bloom, My Little Pony: Friendship is Magic
Length: 3179

Waking up with something unusual one night, Apple Bloom finds that family really does fix everything in the best way possible.

The Apple Clan has some oddities in their family branches. A few of them tend to skip generations here and there. Lucky Apple Bloom, she scored one such oddity. And so did a visiting Babs and Applejack. This is gonna be a long night...

All ponies are over 18, for the purposes of this work.

Warning: Contains futa, excessive cum, belly bulging, minor growth/small macro, lactation, and my poor attempt at pulling off Applejack's twang.

Published 2016-05-27 21:30:01 UTC
Last updated 2016-05-27 21:30:01 UTC

Something's swaying to and fro, anyway

“Applejaaaaaack!” rang throughout the house, making the farmmare’s eyes snap open. That didn’t sound good, and she all but leapt from bed, 3 a.m. on the clock be damned, and trotted to Apple Bloom’s room quickly in worry. She opened the door to see her little sister staring at her with wide eyes... and an impressive length tenting the bedsheets, a wet circle already starting to spread. AJ relaxed at the sight of it and smiled, leaning against the door frame with a chuckle. She leaned her head out into the hallway as Big Mac’s door opened and he poked his head out, little Babs in his arms, already sitting on the fat ebony length that normally dangled from between his legs, red-furred balls heavy and full and eager. Babs, for her part, was snuggled into Mac's chest and blushing, a decent-sized shaft already swelling between her legs. Early bloomer in one regard, at least. AJ waved them closer with a smile, and turned back to her sister.

“What’s wrong, sis? somethin’ “bloomin’” that you didn’t expect?” she asked coyly.

Bloom closed her eyes and swallowed hard, visibly getting herself under control, but she couldn’t keep the note of fear out of her voice as it quavered, “What’s happenin’ to me?”

Applejack smiled again, and stepped into the room, her own length visibly swelling, AB’s eyes wide, focused on the spear of flesh that would put most stallions to shame, and it was only swelling. The thing under the sheets throbbed, and the wet spot only grew bigger. “What’s happening, darlin’, is that one of the special things about the Apple family came to pass with you. Got a funny little, what’d Twilight call it, a ‘genetic oddity’ with us mares. Crops up now an’ again in the family line, sweetheart. It ain’t anything bad, just... different.”

Big Mac stepped into the room, Babs squirming on the thick pole she was butt-first on, even as Mac rolled his hips with every step, prodding a little further forward to rub against the dampening mare’s slit. AJ grinned, while Mac laid Babs down on the nearby table for a bit of leverage, grinding roughly. Babs herself had quieted, her length having gotten large enough to suck on properly, and the little mare was moaning eagerly. Applejack noticed where Bloom’s attention was, and pulled away the covers to reveal a brand new and quite eager stallion shaft of her own between her legs. It throbbed hard in the exposed air, and drooled precum down the nearly foot and a half of length, already better hung than most.

“Well now, ain’t that a pretty sight? You’re bigger than I was at your age, sugarcube. Gotta be a good inch thicker and at least a couple longer. Hay, I’d bet you’re bigger than most of the colts in Miss Cheerilee’s class, with this thing” AJ teased. Apple Bloom whimpered, and Applejack looked up past the towering shaft to see that her little sister was legitimately scared. The smile vanished, and she crawled onto the bed to hug her little sister close, cock pressing against cock as she stroked her mane gently. “Shhh... it’s okay, Bloomy. Breathe for me. There’s nothing wrong with you, I promise you. All I said is it’s different. It ain’t gonna hurt you. In fact, it can be pretty fun, if you’re interested. Right now, though, you just want to get things all figured out, right?” she murmured, nuzzling.

Apple Bloom nodded against her, face pressed to ample, heavy chest. The younger sibling couldn’t resist, and found mouth seeking nipple, nursing for comfort and drawing a gasp from her sister. Bloom glanced up to see AJ smiling down at her, stroking her mane again. “Go on, sweetie. I’m not going anywhere...” she whispered. Bloom closed her eyes and suckled, relaxing as the seconds ticked by, Applejack slowly rolling her hips, frotting their shafts while Big Mac grunted quietly across the room. AJ looked over and smiled, seeing the fat bulge of her brother’s head distending Babs’ belly slightly.

“How’s she feel, big brother? good?” Applejack asked. Mac opened his eyes, and grinned wantonly, thrusting slowly, taking his time to stretch out his little love underneath him.

“Eeyup...” the stallion groaned in answer, his two feet of shaft visibly pulsing and being milked by the tight slit he was working into. Babs, for her part, only moaned around her own thick tip, suckling on it like a pacifier with happy coos and grunts with a blush on her cheeks.

Apple Bloom eased up finally in her nursing, as AJ’s massive shaft throbbed, a river of pre leaking from her broad tip to coat both of their lengths slowly. “Applejack...” she murmured. Her older sister put her arms around her, hugging her gently.

“Feel better, sugarcube?” she whispered. Apple Bloom nodded, then looked down at the mottled length between her legs.

“What do I do with this, now?” the younger pony wondered. Her attention was drawn by a muffled squeal from Babs, and she stared, while AJ smiled.

“Well, there’s a lot you can do, but we’ll start slow... the pleasure’s nice and all, but getting overloaded will be a bit much for your first time. For now,” and the elder sister rolled her hips, grinding her shaft against Bloom’s slowly with a trickle of pre rolling down the length, smearing as it went, “this here is what’s called ‘frotting’. Don’t expect me to explain where the word came from, either, I just know what it is and that it feels good. Er, doesn’t it?” she explained, ending with a questioning note in her tone.

AB blinked a little, taking it in, then rolled her own hips back at Applejack, and bit her lip as her fat length throbbed. “I... ooooooh... it does,” she squeaked, a blush lighting her cheeks. A shift of movement drew her attention again, to see Big Mac pick up Babs, cradling her against his broad, muscled, built chest. The younger pony snuggled in, inhaling deeply of the stallion’s scent as she was carried over by Mac, whose every step shifted and ground his huge length inside her depths visibly. Bloom’s length pulsed in eager answer, suddenly feeling empty in a way she couldn’t describe, as Mac laid Babs down on Bloom’s bed next to her and her sister.

“Thought this... might be more’n comfortable...” the stud grunted, and sank his shaft back inside the eager, welcoming depths, to Babs’ squeals before she was again muffled by her own cock. Apple Bloom couldn’t take it anymore, and looked at her own length, which throbbed merrily, before she looked up at AJ.

“Does that... feel good?” she squeaked. Applejack grinned a little, and nuzzled her cheek.

“What, sucking on your length? or getting made a mare in the best way with a belly full of love?” she asked.

“Yes,” AB answered, grinning a little cheekily despite her trepidation. That earned her a wry smirk.

“As for sucking yourself, if you’re feeling needy... well, just try it” AJ teased, prodding with her own length, pressing Bloom’s shaft closer, until the tip ‘kissed’ her cheek. AB squeaked again, then gave in to temptation, opening her mouth wide to take her fat cock inside.

The taste was amazing, if Apple Bloom thought so herself. One little suckle, as if she were Babs’ age and still drinking from bottles, and her shaft surged, splurting warm, thick pre into her muzzle and over her tongue. Salty and sweet, and thick, the volume enough to bulge out her cheeks. Her eyes half-lidded, and she swallowed, only to get another gush, to be gulped down like the first. Her head bobbed instinctively, taking more and more. She dimly became aware of Applejack stroking her mane slowly, whispering quiet encouragement to her.

“That’s it, sweetie... you know what to do... you know how good it feels now. Stallions love this, and mares like us love it too. It’s nice, isn’t it? drink as much as you like, there’s always more in those big, fat balls of yours... poor baby’s gonna need to get milked three times a day and twice in the morning just to handle it, isn’t she?” her sister crooned. The words heated her cheeks in a new blush, and she nodded reflexively, before glurking as the huge tip prodded at the back of her throat. She pulled off for air and got a splash of pre all over her face. The musky scent assailed her nose and she moaned wantonly, to get an answering moan from Babs as Big Mac drove in fully, sweat dripping off his body and onto both Babs and the sheets, soaking with juices and only getting more so, his black balls hanging down to his knees at that point, and churning almost visibly with seed. A stray thought from the scent of sex and cock had Bloom wondering what it would feel like to have her big brother inside her like that, and her nethers, her virgin mare parts, ached again in desire and need.

AJ pressed her shaft against Apple Bloom’s again, slowly grinding eagerly, the elder sister reaching under her own fat balls to finger her marecunt with a needy sigh. Bloom looked up at AJ, and shivered a bit in anticipation, before giving voice to her thoughts.

“Could... could you... do that to me, big sis?” she asked quietly. AJ went stone still, looking down at her sister with wide eyes, then blushed.

“I’m not sure that’d be the best thing, sugarcube. I’m pretty big, an’ before you ask, Big Mac’s even bigger. We don’t want to hurt you. Takes a long time to heal up, especially when things get rough... having fun like that is nice, but not if you get hurt in the process,” she tried to explain. There was a strangled squawk of surprise as Apple Bloom pulled out the most effective weapon in her ‘cute little sister’ arsenal: the Big, Sad, Pleading Eyes. AJ couldn’t resist, and sighed, even as she pulled her sister close. Ears twitching at Babs gurgling around her flaring cock before gulping mindlessly from her surging balls sending seed down her throat and swelling her belly visibly, Applejack laid her sister back tenderly on the bed, stroking her mane softly.

“Y’ got so big so fast, Apple Bloom... I never thought this day would come so soon. We didn’t even know if it’d happen or not. But, if’n you’re sure, I’ll give you what you want. You just have to promise me that if it gets to be too much, you tell me to stop. Got it?” she murmured. AB nodded silently, biting her lip. Applejack took a deep breath, steadying herself as her shaft bobbed and swayed. She leaned back, shifting, then pressed her marecock down, down, down, and tucked it under her little sister’s fat, churning orbs that would be rivaling hers in a couple years to prod at her hidden place. The pressure made Apple Bloom shiver and squeak in nervousness, even as the warm, slick pre smeared against her tight folds.

The younger sister swallowed hard, and met Applejack’s eyes with her own, before nodding, finding her voice one last time. “Please...” she begged. No whine to her tone, merely pure need, her eyes half-lidding. AJ leaned over, stroking her sister’s cheek, her chest swaying heavily, then rolled her hips forward ever so slowly.

The pressure was immense, Apple Bloom’s tight folds a challenge to spread, but slowly, slowly, her body calmed, relaxing to allow her sister’s fat, already-flaring shaft into her warm, soaking wet depths. There was a wet squelch and Bloom gasped, shuddering violently, whimpering. AJ watched her intently, not moving an inch as her sister struggled to come to terms with the massive length visibly bulging her belly, just as Big Mac was doing to Babs. Seconds ticked by, before AB panted softly, sweat beading on her forehead, and she looked up at Applejack, nodding. Her sister smiled gently, and rolled her hips.

The ache had subsided into an immense feeling of fullness, Apple Bloom found. Her breathing steadied, her eyes half-lidded every time there was the slightest thrust into her newly non-virgin depths. A moan escaped her, a breathy, quivery thing, as her nethers clenched around the pulsing flesh spearing into her.

Applejack looked down at her little sister, stopping halfway inside her with a soft groan. AB whimpered again, and clenched. “Applejack... more...” she whined. The flow of pre from her sister’s fat length almost doubled at her sister's begging, and AJ bucked firmly, sending Bloom’s fat tip back in her mouth to quiet her. Hands slipped down to slender, toned hips, before she did it again. A muffled glurk came from Apple Bloom as her crown prodded her throat, forcing her to drink down her own river of pre, cheeks bulging again.

“Hush now, sugarcube, an’ just let your big sister do all the work. You’ll be full in no time, I promise” she cooed. Bloom only suckled harder on her shaft, head bobbing in answer. Babs was right there with her as her own belly swelled around Mac’s length, the stallion puffing and grunting over her, dripping with sweat.

Applejack wasn’t far behind him, squeezing AB’s hips gently, before finally, slowly starting to properly fuck her little sister, drawing out until only the tip was inside, then pushing back in and getting deeper with every thrust. Apple Bloom whimpered and squeaked muffledly with every thrust, belly bulging obscenely around the thick shaft within, seeming to grow, as her belly visibly swelled ever so slowly.

For a time, all that was heard were wet smacking sounds as Mac fucked Babs eagerly, and Applejack took her time working the full twenty inches of her pride and joy into her baby sister, who squealed happily around her fuckpole every time the medial ring slid inside her. And still, her belly grew, along with the rest of her, less noticeably, as did Babs, Mac and AJ herself. The bed creaked, balls sloshed and slapped, and snorts of delight and lust filled the air. The wonderful feelings coiled in Apple Bloom’s belly, now noisily sloshing like a full bath, as Applejack leaned over to remove Bloom’s cock from her mouth, only to replace it with her tongue in a hot, wet kiss. Bloom grunted in surprise, but submitted, and her tongue wrapped and played with her sister’s as those powerful apple-bucking hips shoved and thrust, cock working in deeper still, until with a SMACK, AJ hilted in Apple Bloom.

AB’s eyes went wide at the feeling as the pleasure in her belly finally exploded, and she cried out with a lusty sob into the kiss as she came, splattering seed like a firehose all over her and AJ, along with some of it getting on Babs, soaking her headboard, staining the walls and making the sheets altogether sticky. A second gush followed the first, then a third, a fourth, Apple Bloom’s back arching slightly under Applejack’s weight as she creamed helplessly. Through it all, her big sister cooed and whispered encouragement, stroking the thick ponycock, coaxing more and more out. With each shot, Apple Bloom’s balls churned, and visibly grew heavier, fuller, larger with even more seed. Finally, the orgasm subsided, leaving Bloom panting and drooling, coated in spunk. Applejack hadn’t moved, simply balls-deep inside her even now, throbbing almost painfully with her own near-release.

“Better, sugarcube?” she whispered. Mac grinned at her, and Babs gurgled blissfully in delight at the small lake of white. It took a moment, several swallows, and savoring the flavor of her own cum, before Apple Bloom found her voice again.

“Applejack...” she rasped, and AJ leaned in, only to have Bloom dart forward like a snake and kiss her sister with plenty of tongue, returning the favor, then breaking it with no small amount of drool dripping down her muzzle in wanton desire, “don’t stop!”

AJ smiled... and started to fuck her baby sister again.

Seconds turned to minutes, and minutes turned to hours, as Apple Bloom was fucked into a proper mare by Applejack. Babs had passed out from pleasure overload half an hour prior, cock still in her mouth, drinking instinctively as she came repeatedly, and guzzled pre otherwise. Mac was definitely much larger than before, having tripled in size and mass. Somehow, the bed had taken him, along with a growing Babs, who still retained her cute proportions, but had the shaft and breasts to more than make up for it, her balls as large as Apple Bloom’s. Bloom, for her part, was very quickly approaching four times her original size. Applejack was already there, matching Mac for size, and maybe even a little larger, and her cock and balls had grown to match, Apple Bloom still virgin-tight herself, as more cum and juices and more than a little bit of milk from AJ’s, and now Babs’ and AB’s heavy, full breasts added to the sogginess. The bed was a total loss, and there was a veritable lake on and around it, cum dripped from the ceiling, soaking into manes and fur and tails and skin, and the family reveled in it. And still Apple Bloom begged for more, more, always more. She’d become insatiable.

Another load of cum blasted into Apple Bloom’s waiting womb, then a second followed it, with AB matching that thick, fertile load by drinking down her own seed in delight. Her face was coated, her bow was lost somewhere, and she was soaked to the point she would very likely smell of sex for a week straight. Her belly swelled and wobbled and sloshed, growing larger. Even now, she looked ready to have foals of her own, and she panted, stroking the massive swell of her belly, listening in delight to Applejack’s orbs churning and filling again already. Her big sister gave her a tired smile, and Bloom couldn’t help but grin weakly back as a few weaker shots of cum splurted deep inside, making her moan. She slumped back on her squishy, destroyed sheets and pillow, finally looking sated.

“So, Apple Bloom... did you enjoy your first time?” Applejack asked quietly, resting on her baby sister’s belly.

AB looked from her sister, to Big Mac, to the conked out Babs, then back to AJ’s eyes and her smile. She couldn’t help but grin back impishly.

“Can we... do this again tomorrow night?” she asked innocently. Big Mac started to laugh, and Applejack snorted, giving her a wry look in response.

“As many times as you want, sugarcube. Though, with your new size for a while, it’s gonna be extra fun” she answered. Apple Bloom blinked, and looked over herself, as if noticing her new size, along with the size of her siblings and Babs for the first time.

“Say, uh... about that... what gives?” she asked.

Applejack smiled wickedly and gave her a wink. “That’s an explanation... for tomorrow night!”