Bigger Little Brother

The next morning, when Shining passed Dusk’s room on his way to the bathroom, he couldn’t help but linger for a moment. Unlike last night, it was absolutely quiet—there wasn’t a sound to be heard. Shining’s ears pricked up, though, when they detected something after all—a low, steady rumbling. Snoring?

He should turn back around, keep heading to the bathroom. But all the same...he needed to see this. He’d see Dusk at breakfast, or throughout the day, but here, in his room, it somehow felt...different. Dusk must be asleep—why else would he be snoring? Shining could just snag a quick glance and then be on his way.

He didn’t know why, really, why he felt like this—why he suddenly needed to look at his brother like this. It was just a whim, an urge that grew inside of him until it was all he could do to stop himself from bucking open the door right then and there. Swallowing the lump in his throat, Shining summoned up his magic, then silently twisted the door handle open.

The door whispered silently over the carpet inside. Shining, moving as slowly and quietly as he could manage, peeked his eye through the crack in the door.

The first thing he noticed was the scent—the musk, that is. Dusk’s scent permeated every pore of his nose, filling his lungs with each breath he took. It was almost stifling: strong, masculine, overpowering. It was a big smell, and, as Shining pushed the door open a little bit further, it more than matched its owner.

Dusk was lying on his bed, splayed across it with his hooves flung out around him. Even though his horn was poking against the headboard, his hindlegs went over the bottom of the mattress, his forelegs dangling over the sides. He was easily too big for his bed—bought for a much smaller colt, it was far too small for this almost cartoonishly big stallion. Shining blinked, swallowing, as he watched the steady rise and fall of Dusk’s wide chest.

That wasn’t the only thing that was rising and falling, though. Shining’s eyes widened, his breath catching in his chest when he caught sight of...well, it.

Dusk’s member, big and black and thick, had pushed its way out of his sheath overnight—or maybe it had never retracted. It arced over his stomach, the flare hovering somewhere above his upper chest. Easily as wide as one of Dusk’s legs, it was easily twice Shining’s own length. The difference in girth wasn’t even close.

A massive nutsack sat right at the base of Dusk’s crotch. Each one of his testes was more than half the size of Shining’s head, and were fatter, rounder, and plumper than any that Shining had ever seen. Shining found his head spinning as he tried to conceive of just how much cum Dusk’s massive orbs could hold. Then, his eyes darting up, he realized that he didn’t have to try.

The ceiling was absolutely splattered with a thick layer of white. It didn’t take Dusk’s genius to determine that it was the source of the overpowering musk. What had to be easily gallons of caked jizz covered the ceiling—and the walls, and the carpet, too, Shining noticed, gulping. The headboard had been painted—or rather, stained—white, fat globs of Dusk’s pleasure stuck onto the fabric.

Dusk’s snoring was louder with the door open; it was like the rumbling of a train engine: low, constant, pervasive. Shining felt his body vibrating to the rhythm of Dusk’s massive body, his crotch stiffening, throbbing in time to the twitches of Dusk’s enormous shaft.

A bead of pre the size of a golfball had beaded at Dusk’s tip. It dangled over his chest for a moment—then plopped down onto his fur, joining the small lake of precum that had been matting his fur throughout the night. Even from here, it was easy to tell that Dusk was at full mast. And even after last night! Shining didn’t even know how many times his “little” brother had gotten off last night, but from the looks of his room, it was more times than he could even imagine. And he looked even bigger today.

It was obvious that Dusk was going to wake up with one hell of a case of morning wood. As if on cue, Dusk groaned slightly, shifting his weight. His right hindleg twitched across the mattress, making the bed’s springs creak in protest at his weight.

Shining reacted instantly. By pure reflex, his magic yanked the door closed. It was only by pure luck that he managed to remember to close it softly, rather than slamming it shut. The door clicked into place, not as softly as when he’d opened it, but much, much more quietly than it could have.

Shining stared at the blank white door for a moment, his chest heaving. Had he really just—no, but he hadn’t done anything—but why did he want to; no, need to—but he couldn’t think about Dusk like that, had to resist the urge to stare at him, to watch his growing, unconscious body. Shining clamped down on that urge, hard, and forced himself to march off back to the bathroom, his newly sprouted erection slapping against his thighs the whole way.

He refused to jerk off that morning, no matter how stiff his crotch got. He couldn’t let Dusk be that kind of stimulus for him—couldn’t let himself keep thinking of his brother like that. And he was supposed to be the bigger brother—why was he so fascinated with Dusk being bigger than him?

Or, he thought, a creeping shudder going down his spine, so fascinated with himself being smaller than Dusk?

Today was a Saturday, which meant no school. Today was a Saturday, though, and that meant Shopping Day.

Mom was too busy to pick up groceries—something about a weekend conference—and Dad was just feeling lazy, so Shining found himself kicked out of the house with a pile of grocery bags and a pouch full of bits. Dusk was with him.

They weren’t quite at the point where Dusk had to duck to get out of the front door, thankfully. All the same, it was hard for Shining to ignore just how much space his brother took up—how his broad shoulders were nearly rubbing the doorframe, how his horn just about scraped the top of the molding. When Dusk stepped fully outside, his full size towering above his brother, Shining almost felt relieved. At least out here, he wouldn’t have to be reminded of how much of a doll house the house was becoming to him.

“So, Shining,” Dusk said, trotting down the street. For him, it was a moderate pace, but his strides were now so much longer that Shining had to nearly jog to keep up. “What’s on the list?”

“Food, mostly.” Shining did his best to keep his eyes on Dad’s grocery list, though it was impossible to ignore the shadow his brother cast over it. “Lots of veggies. Plus some toiletries.”

“Mm.” Dusk licked his lips. “I could go for some veggies right now.”

He’d just eaten breakfast an hour before—complete with a portion size as large as the rest of the family combined. Shining wisely kept his mouth shut.

“Okay,” Shining said, telekinetically rolling up the list. “I think we should be able to get most of this stuff in Canterlot Square.”

“Sounds like a plan,” Dusk said. “Lead the way, big brother.” Shining heard the twist in the last two words, but chose to ignore them.

The Canterlot Square was always a crowded part of the city, and doubly so on weekends. Ponies filled the pavilion, which itself was as long as two hoofball fields. Everywhere Shining looked, there were more vendors hawking their wares: Fruits, sweets, jewelry, clothes. He spotted a soft-looking pink scarf at one stand, and made a mental note to come back later to pick it up for Cadance.

The crowd on any other day would have been stifling. Today, though, with Dusk at his side, Shining found the crowd giving them a wide berth. It didn’t seem to be a conscious thing, really—it just so happened that a stallion of Dusk’s size cut through crowds like a horn through butter. Ponies just unconsciously flowed around him, like water around a boulder, his head poking far enough above the rest of the crowd that anypony could have seen him coming from halfway across the Square.

Their first stop was at a fruit vendor that Mom liked. Shining ordered a half-dozen apples; after looking up to see the hungry glint in Dusk’s eyes, though, he tripled the order. He had a sinking feeling that they’d need to pick up more by tomorrow, anyway.

Fortunately, finding the rest of what they needed was fairly easy. Shining and Dusk had been coming here to shop for most of their lives, after all. Shining Armor was grateful for that. He was happy to be out of an increasingly Dusk-dominated house, but all the same, the stares that they were getting were making him increasingly uncomfortable. It wasn’t like they could stop it, though—Dusk was just big, and that kind of size tended to attract attention.

It wasn’t until Shining scratched off the halfway item on the list, though, that that attention started to go south. At first, Shining couldn’t hear it over the din of the crowd around him, but as time passed, he found the sound growing louder: a steady, meaty thwack-slap sounding off repeatedly as they stepped through the square.

Oh, no. It couldn’t be. But—oh, geeze, it was coming straight from Dusk. Almost completely unwilling to look, Shining forced himself to glance to his side, already fearing what he might find.

Dusk’s stallionhood had slipped out of its sheath, and was now dangling below his belly. Even soft, it was almost as long as Shining’s was hard, and it wasn’t going to stay flaccid for long. Even in the two seconds that Shining turned to watch it, he saw it shudder, throb, then stiffen until it was a good two inches longer than when he’d first seen it. Behind it, a pair of fat, plump balls that dangled down to Dusk’s knees dropped down behind his tail, swaying and slapping against his legs with each long step he took.

Shining had gotten erections in public before—it was an awkward, private sort of thing, but a stallion could usually conceal his beneath his underbelly until it went away. Dusk, though, had no such possibilities available. At more than a head in height taller than the tallest ponies in the square, the bottom of his belly was level with most shorter ponies’ heads, exposing his growing boner to most anypony who passed them by.

Shining swallowed, desperately trying to keep his eyes pointed forward. He’d forgotten which stand they’d been headed to, and now only wanted to hope that Dusk’s arousal would just...go away. Still, it was clear that that was anything but the case. Dusk’s stallionhood continued to stiffen, his shaft lengthening, his girth widening, until his member poked up all the way to the bottom of his chest. Every push of his hips forward sent his oversized organ slapping up against his underside, his wide flare bouncing and swaying as it became visible to literally anypony standing in front of him.

“Hey, Dusk?” Shining asked. He made sure not to make eye contact.

“Yeah, Shining?” Shining heard Dusk swallow, could hear the straining growing in his voice. “What’s up?”

“You feeling okay?”

“Fine,” Dusk said—a little too quickly. “Just fine.”

“If you’re not feeling well, we can just head home—”

“No!” Dusk said, forcefully. Then again, somewhat softer: “I mean, no. Really. I want to finish this up.”

“Okay,” Shining said doubtfully. His nostrils flared. He could already smell Dusk’s musk seeping from his growing erection. It was driving him crazy, too—even awash in the scents and sounds of the largest Canterlot pavilion, Dusk Shine’s smell still found a way to fill his lungs, to heat his crotch, driving his every breath shorter and sharper. Crushing that thought and ignoring the growing stirring between his own legs, Shining double-checked the list and directed Dusk toward the next stall: a stand selling fresh produce from around Fillydelphia. Mom loved their celery—just couldn’t get enough of it. He had a feeling that Dusk couldn’t get enough of it either, though probably not for the same reasons.

As they approached the stall, Dusk’s shadow fell over the shopkeeper, blocking out the sun. The older-looking mare blinked, then glanced up—and paled. The largest stallion she’d likely ever seen grinned awkwardly down at her, his oversized frame filling out most of the stall.

Shining managed to squeeze himself in beside him. “Excuse me,” he said, clearing his throat and hovering the list forward. “We’d like to buy some of your celery. And some potatoes, too, if you have them.”

The mare’s eyes tracked down over Dusk’s neck, his chest, and then—widening—the fat flare dangling between his legs. She licked her lips, still staring forward. “Ah. Yes. Well, I should have some potatoes in the back—let me go check. And you can help yourselves to the celery in some of these crates.” She made a halfway sort of nod toward the produce-filled crates laid out beside the stand, though it was clear her heart wasn’t in it.

“Thanks!” Dusk said. His voice rang out unnaturally loud in the stall’s cramped space. With a small “eep!” the shopkeeper darted back away from the counter and slipped behind the curtain separating the back of the stand.

Dusk blinked after her, blushing. Shining just sighed. Rounding the counter, he stopped over the celery crate and picked a few up in his magic. Dusk followed, his heavy footfalls shaking the ground around the stand slightly. At this size, he was anything but subtle.

Shining pretended to inspect the celery, but really, all his peripheral attention was directed at Dusk. He could hear his brother’s breathing growing deeper, Dusk’s breaths becoming short gasps, and then pants, as whatever arousal had seized hold of him mounted even higher.

“A-ah!” Dusk gasped, his eyes squeezing shut. His hips bucked forward, his erection slapping up against the bottom of his chest. A glob of precum half the size of most of Shining’s entire loads burst from his tip, splattering all over the crate’s contents.

A split second later, the shopkeeper came bustling back out of the back, a crate of potatoes balanced on her back. “I did manage to find some, dears,” she said. “I just want to let you know that—”

Her voice trailed off, her eyes widening even further when she saw the mess Dusk had left. Blushing furiously, Shining yanked out the purse and spilled a pile of bits onto the counter.

“We’ll take the whole crate,” he blurted. Dusk’s stomach grumbled, and Shining dumped a few more bits onto the table. “And the potatoes, too.”

“Ah—I—yes.” The mare just kept staring at Dusk’s ‘leavings,’ looking as though she were trying to ignore the evidence of her eyes. As if on cue, Dusk’s shaft flared again, spurting an even larger load of precum all over the already-dripping pile. “Of course.”

“Thanks!” Shining said quickly. He grabbed both crates in his magic—there was no way they were going to fit in the shopping bags—and turned to leave. “Thanks for the sale; have a nice day. C’mon, Dusk; let’s go.”

His cheeks still flushed red, Dusk turned to go after him. Though he hadn’t had to duck when they entered, the top of his head now scraped against the top of the stall’s roof. They left the shopkeeper staring after them, her glasses slowly slipping down her muzzle, as she watched Dusk’s massive, fat balls smack against the insides of his legs with each step he took. A trail of clearish-white liquid lagged behind them, Dusk’s arousal still spilling copious amounts of pre as his member lurched and shuddered.

Ponies had noticed them before, but now everypony was staring at Dusk. Shining did his best to just put one hoof in front of the other, keeping his eyes pointed straight forward as ponies around them murmured and pointed at Dusk’s oversized member, at the fat, heavy nutsack that his swaying tail did absolutely nothing to hide. He imagined them pointing at him, wondering why he was so much smaller than his brother, wondering why the “bigger” brother’s stallionhood was nearly as long as his “little” brother’s entire torso.

Dusk’s breathing was getting worse, too—he sounded like he was wheezing, gasping for air. The strain on him was obvious; Shining felt his blood run cold when he imagined just what Dusk was struggling to hold back. Then he remembered his brother’s “activities” from the night before, and just how much he’d produced—how much, and how many times he’d had to produce—and imagined no more.

A growing stallion had a growing libido, after all.

Dusk’s nostrils flared steadily, his limbs trembling as they made their way down the side of the Square. Shining would almost swear he could hear his brother’s nuts churning beside him, sloshing as Dusk’s cock slapped against the insides of his forelegs. He kept himself from looking at them—just barely—but knew that they were there: a pair of huge, heavy cum-filled orbs so big and musky that he could just bury his muzzle in them.

It wasn’t for another fifteen seconds that Dusk broke, but the incident was one that Shining would remember for a long while. It was an innocent motion—Dusk, unaccustomed to his new size and stride, stumbled, and nearly tripped. He twisted to one side, his hip curving toward Shining—and letting his engorged erection rub against Shining’s side. Shining’s eyes widened as his little brother’s big erection left a dripping trail of precum matting his fur, but Dusk actually moaned.

That did it. The second Dusk’s hooves touched the ground, his shaft throbbed, splattering the ground with a puddle of precum as wide as Shining’s head. Dusk gapped, his nuts churning audibly as he gasped, “Where’s the bathroom?”

Everypony was watching them—what their expressions were, Shining didn’t want to know in the slightest. He was too busy trying to control his own mortification. “Uh. I don’t think there’s a public one nearby, but—”

“Never mind,” Dusk blurted, and rushed off to the side. He galloped through the crowd his huge stride covering distances longer than most ponies’ bodies as he shot toward an opening in the stalls just barely wide enough for him to fit. His cock slapped against his belly with each bound, spurting huge globs of pre as his mounting arousal reached a peak.

Shining just barely managed to catch Dusk slipping into an alleyway before his brother vanished from sight. Pushing his way through the crowd proved to be more difficult without a seven-foot stallion to break the surf for him, but Dusk had already cleared a wide berth, actually having knocked over several ponies in his desperate escape. Shining galloped after him, his mane flying behind him as his own mounting erection stiffened between his legs.

He heard Dusk before he saw him—a loud, roaring moan interspersed with grunts and gasps. “Ah—ah—aah!” Then—

Shining rounded the corner just in time to see Dusk, his forelegs propped up against the alley wall, cry out as his hips bucked forward. His monstrous shaft, which was fully engorged and throbbing heavily, bulged visibly before lurching, unleashing a load of cum that had to be at least a gallon in volume.

It all splattered against the wall, stains of a thick, creamy, white covering the bricks and slowly dripping down to the ground. It wasn’t long before a second gallon joined the first, Dusk’s cries of pleasure bouncing off the alley walls as he absolutely drenched the ground and sides with his seed. The wall actually shook as he slammed his hoof against it, his whole body twisting with the force of his orgasm as his third load burst against the wall, bigger in volume than the first two combined.

Shining whirled back away from the carnal scene and flattened himself against the wall. He stared at the back of the stall before him, his chest pumping up and down while his heart went doubletime. Oh, fuck. He’d seen Dusk’s leavings—had seen him in all his glory—but he hadn’t seen him like this, so incredibly virile, big that even his arousal was huge, his uncontrollable libido covering his surroundings with impossible amounts of his size-fueled spunk.

He himself was hard—incredibly so, even. Shining let his forelegs drop to the ground just as a fourth splat! echoed out from the alley, Dusk’s labored breathing mixing with his moans. Shining couldn’t—wouldn’t let himself lose control, wouldn’t give into his own arousal now. He had to deny that he was turned on, couldn’t allow—not like this. And yet he couldn’t help but stand there, frozen still, as he remembered just how close Dusk’s front hoof had been to the second-story window when he’d been leaning against the building.

Another half-minute later, Dusk finally re-emerged from the alleyway. He’d evidently used magic to clean up, Shining noted as he peered past Dusk’s shoulder, though a dumpster a bit further down looked to be overflowing with a white, creamy liquid.

Shining swallowed, steadied himself, and then looked up at Dusk. All the way up at Dusk. His brother’s head towered above him, his big body covering Shining’s in its shadow.

Shining coughed. “So, uh—all done with your, ah, bathroom break?”

Dusk blushed furiously. “Yeah,” he muttered, glancing to the side. The stares from the crowd seemed to almost overwhelm him. “Uh—sorry.”

“No problem.” Shining definitely wasn’t making eye contact right then. “Um. Good to go?”

Dusk coughed as well. “Let’s.”