Sky's Limits
Commission for NightSkyFox :D All characters are (c) him.
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Sky looked up to his big brother. Rai was a full eight years older than little Sky, and legally an adult. He was done with school and got to hang out around the house all day while Mom and Dad had to go and work for most of the day, and Sky had to go to school. Sky thought that Dad was jealous too because he often heard Dad yelling at Rai about him laying around.
One day, while Sky peeked in on one of these bouts of yelling, he noticed Dad kept looking between Rai's legs. Sky hmmed, and looked from his hidden perspective of the upstairs railing at Rai's crotch. Then he looked at Dad's. There was a bulge pressing out against the fabric of Rai's pants, as there always was, but Dad's barely showed a sign of anything behind the pressed fabric. Maybe Dad was jealous about this too. Dad was full German Shepard, but Mom was half Fox-half German Shepard. The boys were three quarters domestic dog and one quarter fox each.
Sky wondered about that protrusion that was always in Rai's pants, and why he never had it. Maybe it had to do with the more grown up undies Rai wore? He looked down at his underoos with disdain. While Rai was occupied with being yelled at, Sky snuck his way into his big brother's room. The messy chamber was hard to navigate, but once he saw his target, the chest of drawers, he had his heading. Careful walking brought him there without injury, and he scrambled to the top of a pile of dirty laundry to be able to reach the top drawer of the chest.
The pup paused, perking one ear up. He could still hear Dad yelling at Rai. Sky smiled and tugged open the top shelf. Inside was a mass of boxers, briefs and strange, tighter looking undergarments he didn't recognize. None of them seemed to have a big lump in them. He was about to close the drawer when he saw something mostly obscured by an athletic cup. A bottle. Sky reached and retrieved the bottle, plastic, with a child protection top.
Looking at the bottle it read "Insta-Grow" with a big cartoony arrow on the label. On the back there was a "before" image of a pair of pants flat, like Dad's, and an "after" image with pants bulged like Rai's! Sky shook the bottle, hearing pills rattling inside. He hmmed. He had learned how to undo a child-proof cap some time ago... and it wouldn't hurt to try one, would it? He carefully pressed the cap down, then twisted it, grinning as it popped open. He reached in and grabbed a pill, looking at it. He heard steps coming up the stairs.
Eyes wide he shoved the pill into his muzzle and closed the bottle as best he could. Once he did he shoved the bottle back where it had been and closed the chest. The force of doing this caused him to topple back and onto the laundry, gulping reflexively. He had taken the pill.
Rai opened his door, raising an eyebrow at his little brother, upside down on one of his piles of dirty clothes, "Is there a reason you're in here, Sky?"
The littler dog rolled up onto his feet, "No reason." He lied, carefully making his way to the door, "It's a little better than listening to Dad yell at you."
The older brother chuckled, giving his little brother an affectionate pat on the head, "Well, be careful in here. I dun wanna see you come into my room without my supervision. I have some dangerous things."
"Like bear traps?" Sky looked amazed.
Rai chuckled, "Yup. Right under that pile of clothes." He pointed to one near his closet. "Its set, too."
"Woooww..." the little brother cooed naively.
"Now off to bed with you." Rai insisted, "Don't wanna have another dad yellfest up here where you can hear it. Especially if its directed at you."
Sky nodnodded in understanding and hugged his brother's leg, "Nini bro."
Rai chuckled and patted the little dog on the head, "Sleep tight, little bro."
Rai never knew how right his wording was.
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In the morning Sky woke up to an almost painful tightness in his loins. He whimpered, feeling at his underroos. They felt far too tight, and he slowly, shudderingly worked them off, eyes clenched shut. When he finally got the undies away, he tried to find the reason they were so tight. He opened his eyes in confusion at what he felt, then slowly looked down. His prepubescent sheathe and barely visible balls were gone, replaced with a fully formed adult sheathe, and mature, dropped balls hanging in a sac below. "Oooh..." He rubbed at the new parts of him, blushing and moaning at the sensation, biting his lip.
Something clicked. The tightness, the pill bottle, the before and after pictures... This sort of thing was what was bulging out his brother's pants. Sky pondered to himself, before the new needs he felt distracted him again. He started grinding his hips into his paws, feeling the sheathe swell, then start to press his pink shaft out into the open. He bit back another moan as he tentatively felt over that with his soft pads, before starting to stroke and pump at the stiffening rod, so much larger than it was last time he used the bathroom.
Before he knew it, he was letting out a yip, and his shaft swelled out thickly, starting to spray shots of sticky white fluid over his head, and the headboard, neatly landing in the wastepaper basket his Mom had placed there. The last two shots hit the headboard and his chest respectively, before his member collapsed against his belly, drooling.
Sky shivered, panting softly, before he heard the doorknob rattle, and he tugged his blankets up before the door could open, hiding most of the mess and his new arousal.
Rai was there, rubbing his eyes, "Hey... lil bro.. if you're gonna jack off, could you be a little quieter? I know it's a part of growing up, hell I still do it, but could you try and be more quiet? Thanks..." The bigger dog didn't wait for a response, he just said it all in a half asleep monologue, completely oblivious to the fact that he was naked, and his little brother got to see how enormous his sheathe and nuts were. The sheathe was so big it couldn't be supported to his belly anymore, and laid on the indent between his two, heavy nuts, like apples in size. And then they were gone, the older dog wandering out of the room and closing the door, back towards his own bedroom, and sleep.
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All day, Sky could think about nothing but how big his brother was, and getting as big as him, or maybe bigger. He resolved to sneak into his big bro's room again, and take more pills... When the time rolled around, hearing Dad starting his tirade anew, exactly on schedule, Sky snuck his way to his big brother's room, and carefully avoided laundry piles that might contain bear traps. Knowing the pile by the chest of drawers was safe he scrambled atop it and opened the chest. Finding the bottle again, he grinned, and closed the drawer again, sneaking his way back out with the bottle. When he had gone up to his room, he had insisted on bringing a big glass of water. Now it would be put to good use.
Closing his bedroom door, he carefully opened the bottle, then started to pop pills, alternated with sips of water. He did this until he started feeling full. He continued doing it, determined to outdo his brother, until he had no pills left to take. He groaned, feeling his belly slightly distended with water and pills, taking a couple more drinks of his glass, until it was empty as well. With a rattling slosh and a blush, Sky scooted under his covers, and tugged off the size larger underroos he had gotten for himself, in anticipation of his growing in the night. It didn't take much for him to fall asleep.
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Rai woke up with a soft groan, sitting up. He did what he always did first thing in the morning, stagger to his chest of drawers and take a pill. He had been doing so for a month, and his loins were bigger than he could have ever hoped. He reached into his drawer and felt his cup... no bottle. He blinked blearily, and looked closer. No bottle. He scrambled, searching the whole drawer, before he remembered where he saw his little brother when he arrived at his room a couple nights ago.
"Oh, fuck no." He staggered nakedly into the hall, oblivious of who might be awake, and pressed into Sky's room. Looking about, he saw Sky was asleep, his back facing the room. Rai growled, and started looking for the pill bottle. He found it after a few groping motions under the bed, and picked it up, wondering why it was so light, until he saw that the lid was gone, and it was empty. He looked blearily under the bed, to see if the pills had spilled all over the floor. Not one to be seen. He heard Sky shift in his bed, and looked up.
Rai's jaw dropped. The sheer mass of Sky's new endowment had pushed the covers away when he rolled onto his back, and let his brother see the morning wood, long enough to reach Sky's chin if he tried. With morbid curiosity, Rai pulled the blankets the rest of the way away. The little dog's nuts were as big as cantaloupes at least, pulsing a little, along with his cock, with the sleeping heartbeat.
Only one thing occurred to Rai. Sky must have taken every single pill left in the bottle...
Sky groaned weakly, and his eyes fluttered open, awoken by the chill on his nuts. "Uhhnn.... Rai...?" The little dog murmured, then squeaked in shock as last night came back to him, "I- Rai, I'm sorry... I didn't mean to..." He tried to explain lamely.
Rai reached to start to stroke Sky's shaft, somehow finding his little brother more adorable with an amazing package. Sky moaned weakly, then turned his head and bit his pillow firmly.
Rai grinned, "That's right... keep it quiet Sky... I'll give this new gun of yours a test firing..." He couldn't help himself, his own large, but completely outclassed shaft throbbing in front of him without having been touched. He carefully crawled up onto the bed, between his little brother's legs, careful not to disturb the massive sac, before pulling the shaft up and away from Sky's chest, stroking it firmly but not harshly, leaning in to give it a few tender licks.
Sky whimpered and writhed, biting down harder on his pillow, the sensations so powerful. He could already feel his peak bubbling up inside him, rushing towards him.
Rai panted, licking at the tip of the massive shaft, grinding his own against its base and the soft sac full of heavy testes below. The older dog bit his lip hard, and spurted his seed across Sky's base, panting hard through his nose.
Moments later, Sky shoved more of the pillow in his mouth and let out a muffled scream, his nuts contracting and his massive shaft spasming. After a moment it went off like a shot, splattering the ceiling with three shots, before the fourth barely fell short, and the fifth was a glorified dribble. Regardless, both brothers were completely soaked by the time both had finished their peaks. Sky panted weakly, turning his head over, the pillow managing to have sheltered him from the downpour of spooge, at least on his face. Opening his clear eyes, he saw Rai look faint, and start to topple over towards the standing shaft. As this happened, Sky's seemingly spent shaft bent and curved towards Rai, as if anticipating. Sky looked confused, until he felt something spread open the head of his shaft.
Rai murmured weakly as something warm wrapped around his head. He didn't seem to mind in his afterglow, until he tried to move his arms, and they were pinned by that same warmth. He wriggled weakly, feeling the warmth pulse and work down over his torso more and more. Rai groaned, and tried to pull away, only to lose traction on his knees on the bed from all the cum on the sheets.
Sky watched in pleasured fascination as his cock worked more and more of his big brother into its form. By now it had bent around, and was about to drag the older dog's hips into itself. He shuddered and groaned, biting his finger to keep quiet as he felt the muzzle of his brother pressing through his body proper, starting to go down beneath. Another flex brought the hanging, soppy legs and tail of the other dog up over the shaft, starting to use gravity to take him in.
Rai started to feel himself curl up in a tight, snug space, kicking his legs weakly as he feels the warmth claiming them as well. As he curls around, he finds his nose pressing to his own shaft, and lets out a low moan, before it's shoved into his muzzle. He starts to suckle weakly, feeling his feet starting to be claimed.
Sky panted hard, filled with so much orgasmic bliss as he watched his brother's toes slide out of sight, then the tip of his soggy tail. He groped and rubbed his shaft, feeling and watching the bulge of his brother's legs sliding down and into his left testicle, swelling it out massively as the older vulpine fills it out. A loud gurgling sound started to sound as soon as Rai was fully tucked away.
Rai moaned around his shaft, murmuring and suckling, before squirming and bucking his hips as much as he could, letting out one last orgasm down his throat, before the warmth around him became overwhelming. A tingling began, and he couldn't feel his body anymore... he started to pass out...
Sky's jaw dropped as the bulge of Rai in his sac faded away, and then there was a rushing sensation, as seed flowed from one nut to the other, balancing them out. His cock, seeming satisfied, slid down into its new, enormous sheathe, letting out a little belch before it was gone.
The little dog stared at his enormous package... then slowly grinned. Who to put in there next?
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