Jon the Growing Stepdad: Chapter 4 -- Christmas Break Lift

[spacevlad]

Previous chapters:

Chapter 1

Chapter 2

Chapter 3

 

 

Austin comes home for Christmas Break to see how much bigger his musclebear step dad has grown. Jon shows off his new size and strength, and the two continue to grow closer together.

 

 

Chapter 4: Christmas Break

 

Austin pulled into the driveway of his dad’s house, the snow crunching under the tires of his big truck. His stepdad’s own new truck, which was even bigger than his, sat in the driveway. It was a bright and sunny afternoon, but cold with snow all around, a lovely white Christmas as Austin arrived home for winter break.

 

Austin knew that if Jon had been following his regimen, he would be napping now. Austin had given Jon a strict schedule and routine to follow, down to the hour, and had worked hard to order food, supplements, clothes, equipment, and more since going back to college after Thanksgiving break. He had really stepped up Jon’s growth and training, sending over food deliveries every day and even supplying him with growth hormones and steroids. Austin wanted to maximize this opportunity to make Jon grow as big as possible, whatever it took.

 

He had also told Jon not to give him regular updates on his progress; Austin wanted to be surprised how much Jon had grown over the last 4 weeks.

 

Austin quietly opened the door, making his way into the house through the front door. He sniffed deeply as he came inside; the whole house smelled like a locker room, sweaty and musky, but he also smelled freshly-baked cookies. He could see a stack of recently-eaten plastic food containers and a decimated tray of gingerbread cookies; Jon had a big lunch, just like Austin told him to.

 

“SSNNNNRRRRHHHH… Hhhhhnnnngggg.” Even from the entrance, he could hear the deep, rumbling snores of his big muscle pup stepdad from the bedroom upstairs. He made his way there quietly, taking off his jeans and jacket and getting down to his tight boxer briefs and tank top, his bullpup’s snores getting louder as he got closer, the musky jock stink getting stronger as he opened up the door to the bedroom.

 

Inside, Jon lay sprawled out on the bed under the covers, a mountainous, ursine form rising and falling with each thunderous snore. Austin could see his face, his cheeks fuller and plumper than when he had last seen him, his mouth slightly open, drooling in total relaxation. His beard was thick and luxurious, waves of brown, blonde, and white fur filling out and down.

 

Austin approached and carefully got into bed, nestling in under the covers next to his massive dad, letting Jon be the big spoon to Austin’s little spoon. The temperature and humidity under the covers was intense, and Austin immediately started sweating; Jon’s body was radiating heat like a furnace. Jon, still asleep, breathed in deeply and then exhaled, his warm breath washing over Austin as he smacked his lips. Jon adjusted his weight and wrapped his arms around the warm, firm mass he had suddenly found pressing against him.

 

Austin felt his huge pup’s bulge under the covers swell to life, twitching and growing as it strained the tighty whities that contained it. It throbbed until it pressed firmly against Austin’s furry, muscular ass. Jon bucked against him in his sleep. Jon’s breathing became more erratic as his cock grew even bigger, and his arms suddenly squeezed Austin tightly; his strength was unbelievable! Austin grunted as Jon’s bulge pushed right against his tight hole, teasing and threatening to invade, until Austin managed to twist around in his pup’s grip and face him.

 

“Hey there, big pup, guess who’s home?” Austin said as he reached out and felt Jon’s enormous chest under the covers. Jon was shirtless under the covers, and his pecs were slick with sweat. His dense chest fur curled into ringlets as Austin rubbed. He couldn’t see it yet, but the amount of mass under there made him gasp; just how big had his daddy pup grown?

 

Jon awoke, the ice blue of his eyes sparkling and a massive smile spreading across his face. “Sir!” his deep voice boomed, vibrating Austin’s torso with the force of it. “You’re home already!” Jon squeezed Austin in his massive arms, the muscles of his biceps pressing against Austin’s sides until he almost felt ribs popping, his breath smelling of chocolate protein powder and chicken. “MMM, I’m so excited to see you!” Jon said, bulge rubbing against Austin’s under the covers.

 

“Hhhhnnggg, pup you hug so hard!” Austin wheezed, feeling the air press out of his lungs. “Merry Christmas, dad!”

 

Jon grinned wider. “Heh sorry son, I don’t know my strength!” Jon adjusted his weight, causing the bed to shake, and rubbed Austin’s lean, hard abs and sides under the covers, running his huge hands up and down his master’s torso. “Mmm we could cuddle in bed like this all day,” Jon purred. Austin noticed that his voice was even deeper than it was at Thanksgiving. “I missed you so much,” Jon whispered as quietly as his deep voice would allow, emotion causing his lower lip to quiver a bit.

 

“Aww, big guy, I missed you too,” Austin said, rubbing his hands across his stepdad’s bigger, thicker body. He leaned in closer until they were face to face. We’re gonna spend so much quality time these next two weeks,” Austin whispered. Both of them breathed in deeply and sighed, feeling excited and relieved to be together again.

 

“Mmm, sounds good, sir,” Jon said as he stretched and flexed his huge body. “We should keep cuddling like this, I missed this the most,” he said as he wrapped his big arms around Austin’s smaller body.

 

“We could, but then we’d miss valuable opportunities for you to grow! And I think it’s almost time for your afternoon lift, isn’t it?” Austin said. “Have you been a good pup and following Sir’s schedule?”

 

“Of course, Sir!” Jon said, sounding more serious. “Your schedule is perfect. It’s really been helping me grow BIGGER,” Jon said. “Plus, I’m already getting hungry again, almost time for me to feed.”

 

Austin slipped out of Jon’s arms and scooted out of bed. Jon’s eyes lit up and scanned Austin’s lean, muscular body as he stood next to the bed.

 

“Like what you see, pup?” Austin said, showing off his fit, muscular build, flexing his hard pecs and trim waist. He was college muscle jock perfection.

 

“Yeah, Sir, you look great,” Jon rumbled as he shifted off the covers, planted his feet next to the bed, and stood slowly. “But you’re so much smaller than me now!”

 

Austin took a step back, his jaw dropping open, as his stepdad rose to his full height. He was way taller than Austin’s 6’0” now. Austin stared straight at his dad’s chest, then craned his neck to look up at the brute smirking down at him.

 

The floorboards creaked as Jon shifted his weight and took a deep breath, expanding his massive chest in Austin’s face, the thick musculature of his pecs swelling to full size. Jon exhaled, his breath ruffling Austin’s hair, and grinned.

 

“Heh, little master looks smaller than last time!” Jon rumbled, standing nearly naked in front of Austin. His immense torso heaved with thick muscles as he breathed in and out. His calves and thighs bulged outwards, great mounds of muscle to hold up his titanic torso, and pushed his obscene bulge forward.

 

Jon was slick and shiny with sweat, like he had just lifted even though he was napping. Austin noticed the sheets were soaked and stained yellow from Jon’s constant sweating, a side-effect from his unprecedented growth, and the full strength of his BO funk washed over Austin in waves of sharp, sour musk.

 

“I don’t think I’ve gotten any smaller, but you certainly have grown a lot bigger!” Austin said as he breathed in his dad’s musk and rubbed his hands against Jon’s huge, broad chest.

 

Jon stepped forward and bounced his belly against Austin, causing him to take a step back. “I’ve been growing really fast since Thanksgiving, Sir,” Jon breathed and he brought his fists together in front of his gut to flex. His round, thick chest, mountainous traps, and bulging biceps all swelled with size, so much bigger and thicker and harder than just a month ago. “Usually 7 or 8 pounds a day. Is that good?” Jon said innocently, pressing harder against his hard, lean, muscular stepson.

“Jon you’re… so much bigger! How is this… wow!” Austin stammered, feeling his stepdad’s bigger, stronger, thicker body.

 

“Just following your directions, Sir. Eat, lift, eat, nap, eat, lift, eat, lift, eat, sleep,” he said, counting off each step with a finger. “I need to work hard to grow big for you, son. Are you proud of me?” Jon said as he stepped closer again, backing Austin up against a wall. Jon pressed his belly and chest against Austin’s torso and face. “Do you like all my gains? It’s all for you, Sir…” Jon said as he started to rub his sweaty bulk against Austin. “Love growing bigger for you…”

 

Jon’s cock had grown along with the rest of him, and the sweaty, stained underwear strained to contain it; it swelled as Jon rubbed against Austin, pre forming a wet spot on his underwear. Jon shuttered as he felt his bulk pin Austin to the wall. “So much bigger than you now…” Jon breathed, his balls tightening, and Austin could feel his barely-contained bull strength physically and mentally overpower him.

Austin pushed back, his will overtaking Jon’s. “No, pup, not yet. We still have more work to do before we can have fun!” Austin said forcefully.

 

“Yes Sir!” Jon growled, his deep voice booming.

 

“It’s time for your afternoon lift, pup. Let’s get to it. This time with your little master pushing you to your limit. Let’s see what this big body of yours is capable of!”

 

Jon smacked his fist into his palm, flexed his chest, and grunted. “Yes Sir!”

 

“Step over to the scale and let’s just see how big you’ve gotten,” Austin said, and Jon obeyed. The scale was a big, industrial-strength one for measuring freight; Austin had purchased that knowing they would need it in the months to come. The number flashed 504 when it had equalized.

 

“Over 200 pounds in 4 weeks! I’m so proud of you, pup,” Austin said, rubbing his hand against Jon’s wide, muscular back. “Getting SO big, pup!”

 

“Mmmph, yes Sir, growing bigger for you!” Jon said. His whole body shivered with pleasure and his big bulge twitched. Nothing pleased him more than hearing his Sir praise him.

 

“Step over to the mirror,” Austin ordered, and his pup obeyed. Austin noticed the hardwood in front of the mirror was stained white and yellow, and dried, milky streaks dirtied the mirror itself. “Stand up straight,” Austin said as he walked around his hulking stepdad, inspecting the growing specimen.

 

Jon’s shoulders bulged out to the sides, his arms pressed against his thick lats, and his back spread wider than two regular men. His waist narrowed and looked trim against the absurd width of his shoulders, but his round, hard gut swelled out in front, matched only by the thick pec shelf that hung above it. Jon’s beard had grown longer to the point where it was brushing against the dirty blonde chest fur, which was coiled in sweat-soaked ringlets that covered his giant pecs. The beard had a bright blonde streak running down the middle, flanked with darker, denser fur that covered all the way up to his ruddy, full cheeks. His hair was freshly trimmed, just like Austin had asked for. More fur spread along his traps and shoulders and inched down his back; it was growing thicker back there quickly. The giant shifted his weight, his massive 500lbs causing the floor to groan, and Austin saw how his enormous thighs twitched and swelled to support his mass.

 

“Good, bull. My, my you’re getting big, aren’t you?” Austin said.

 

“Y-yes Sir,” Jon said, enormously turned on, his hard cock throbbing and leaking as he looked at his own reflection, his muscles twitching with every slight movement.

 

“How do you feel about your growth and progress, pup?” Austin said, teasing the big man further, running a hand over the immense, dense expanse of Jon’s upper right arm and bulbous, round, hard deltoid. Jon instinctively flexed for his master.

 

“G-good… big! So much growth… all I do, Sir, I lift, I eat, I sleep. I can’t think about anything else but MORE, Sir. I want it so badly,” Jon groaned, even more so when Austin ran his hand against Jon’s bulky pec and flicked a meaty nipple.

 

“Good. You’re a good pup, aren’t you? Always listening to me,” Austin said as he circled around his enormous stepdad, rubbing his calloused hand against Jon’s enormous, thick bubble butt and bouncing it up and down.

 

Jon sighed, his body shaking. “Yes Sir, always Sir, of course!” he said, trying to sound tough but his voice wavering, his mind overcome with desire. “Anything for you!”

 

“Mmmm good,” Austin cooed. “But is this enough?” he said, reaching up to pull Jon’s ear down to him. “Or do you want more?” Austin said, the last word a breathy whisper that lingered.

 

Jon shuddered instinctively, his cock twitching, his muscles shaking. A thick strand of precum oozed out of his hard cock and made a growing wet spot on his briefs. “Unnnggg, Sir, I need…” he trailed off, before taking a heavy breath and gulping, suddenly thirsty. “I need MORE!”

 

“That’s what I want to hear,” Austin said, still holding Jon’s head to lean down to his height. “Now get dressed and show me what you can do with all that bulk,” he said as he released his pup and smacked his ass hard.

 

Jon grinned and straightened to his full, towering 6’8” and 504lbs. “Yes Sir!” he boomed as he flexed in the mirror for his little master.

 

 

“LET’S GOOOO, PUSH, NOW!” Austin yelled in a commanding voice right in Jon’s face, squatting down in front of his massive stepdad. “FUCKING NOW, PUP, DO IT!”

 

Jon grunted loudly as he stood from deep in the pocket. A thick Olympic bar with enough weight on each side to make it bend lay across his enormous traps and shoulders as the huge man stood, slowly but surely. His quads quivered as he did, shaking with power and exertion.

 

“RRRRHHHHUUUUUHHHHH,” Jon growled as he stood to his full height, the weights shaking as his legs flexed, holding over a thousand pounds on his back. He had just finished another set of 12.

 

“FUCK YES, BULL!” Austin said, slapping his huge dad on the back as Jon unclasped his belt and breathed heavily, his chest heaving up and down. A puddle of sweat pooled underneath him as it dropped off his face and arms. He bent over to catch his breath, grunting and shaking, adrenaline surging through his veins.

 

Jon was wearing black gym shorts that only came halfway up his thighs, which were ruddy and swollen with pump, and a stringer tank top that was a shade darker than it ought to be from sweat, a mascot logo of Austin’s school on the front, faded from overuse even though it was just a couple months old. It was comically small for the big man. The look was completed by huge, wide, heavy Otomix shoes, the flat bottoms perfect for lifting heavy, the laces open to make room for Jon’s thick feet.

 

“Four hours of hard work and grinding and showing your Sir what you’re capable of,” Austin said, leaning down and speaking into his dad’s ear. “And you know what?” Austin asked.

 

“Huuhhh, ffffuhhhh, mmmmuuaaaahh, what,” Jon gasped.

 

“You’re the biggest,” Austin said, punctuating his words by slapping his dad’s meaty ass, “strongest,” *smack* “thickest” *smack* “hardest working,” *smack* “bullpup I’ve ever seen,” Austin said, ending by grabbing a handful of Jon’s thick glutes and squeezing.

 

“Hehe, *huff*, thank you, Sir!” Jon panted, standing and putting his hands on his hips, pacing around and shaking out his overclocked quads. “Couldn’t have done it *huff* without you pushing me.”

 

They were just wrapping up a 4 hour long marathon gym session. The garage had been further upgraded into a world-class gym, way bigger and better than the old set up a month ago. They had done a little bit of everything, Austin ordering Jon around and pushing him harder than ever, yelling at him, spotting for him, keeping him going harder and harder.

 

Jon was eager to show off for his stepson too. He had worked so hard over these months, mostly alone, feeling the need to make his son happy and proud of him, needing to grow bigger and stronger. Now that his master was here in person, pushing him harder, that desire consumed every thought in his mind. To do so in front of him now, achieving results he never dreamed possible, was extremely fulfilling.

 

“I’m so proud of you, pup. You know, you are easily the strongest man in the world now,” Austin said, coming up to his sweat-soaked stepdad and wrapping his arms around him. He could only reach to his lats, not even able to reach his back now. Sweat dripped down on him from Jon’s beard and nose. “Absolutely crushing world records in front of me like it’s no big deal,” Austin said as he looked up at his obedient pup. Influencing him like this felt so easy, so good in person.

 

Jon grinned as he looked down at Austin. He took a deep breath and expanded his chest, making Austin’s arms lose their grip around his lats. He swelled with pride, and his cock bulged in his shorts. “All for you, son. Turning into the biggest damn stepdad in the world!” Jon said. He lifted his arms up for a double-bicep pose.

 

“Mmm that’s right,” Austin said, reaching up to caress Jon’s massive arms, which were covered in a slick sheen of sweat. The musky jock smell that radiated from Jon’s pits hit Austin like a wave, intense and tangy and manly. The whole room was hot and humid even though it was winter outside. “And you smell so good,” Austin said. He stepped forward and buried his nose in Jon’s deep, hairy pit.

 

“Mmm glad that you like my scent, Sir,” Jon grunted, pup said with a smirk. He lowered his arm, trapping Austin in his musky armpit. “Yeah, getting my man smell all over you, mmm,” Jon grunted.

 

Austin gasped as he came up for air, snuffling and looking dizzy. “Hoo, wow, that’s good,” he said. “Such a musky pup! Makes sense with how hard you’ve been working and how big you’re getting, huh?” Austin teased.

 

“All the gear I’m on makes my musk smell even more potent, Sir,” Jon rumbled. He cranked his neck over to his hairy pit and huffed deeply, breathing in his own musk. He exhaled and then took another whiff, his muscles straining, hard for him to move his nose over that far now. “So good, rrrfff,” Jon sighed.

 

“Now go pump up those pecs some more,” Austin said, pointing to the pec deck. Jon obediently complied.

 

“I’ve grown so fast… it’s almost hard to believe,” Jon said as he lowered his arms. He waddled over to the pec deck, which was already set at the highest weight, like all the machines were. “I’m a new man, a bigger, better man! And I just keep growing… I keep wondering if it’s going to stop or slow down, but if anything I’m just growing faster every day. It’s an addiction. It’s all I think about. And all for you, son,” Jon grunted as he started cranking out reps.

 

“I know,” Austin said, walking over to Jon and watching him pump his chest, each rep more than what Austin weighed. “I never expected this. I wouldn’t believe it if I didn’t see and feel it myself,” he said. 20, 30, 40 reps without a rest…Jon made it look like warm up weight. Jon’s pecs swelled up fuller and bigger; Austin reached out and felt Jon’s chest hardening and squeezing with each rep, rubbing the sweat that ran down Jon’s pec cleavage. “Feels amazing, pup,” Austin said as he rubbed. Austin looked right into Jon’s blue eyes. Jon stared back, both of them locked in. “And you’re just gonna keep getting bigger, I can feel it.”

 

“It feels, unf, so good, Sir,” Jon grunted, passing 50 reps. “I never knew how badly I needed to grow. I’m so glad, unf, I have you to guide me. And, unf, how much size I keep packing on. And how much, unf, taller I’m getting! It’s awesome. I, unf, wake up every morning in awe of my own, unf, GAINS, and it’s all because of you, son,” Jon grunted, perfect rep after perfect rep making him sweat profusely.

 

“Of course, dad,” Austin said. “Anything for my growing pup. Your growth is beyond anything I ever dreamed of. When I told you to get into lifting 4 months ago, I never realized I’d be creating a MONSTER,” he said.

 

Jon finished his 100^th rep, looking like he could have gone for another 100 even though he had been lifting unreal weights for 4 hours. The weights clanked back into place and the big musclebear daddy stood to his full height again, towering over Austin.

 

“Mmmmm I love when you call me that,” Jon growled, his deep voice rumbling Austin’s chest. He adjusted his weight, his pumped chest pushing out between his flimsy tank top. “Monster grow big for master,” he grunted in a goofy, goonish voice, his eyes glazing over, his obscene bulge throbbing in his tiny gym shorts.

 

“Such a good pup,” Austin said, stepping forward and rubbing Jon’s huge chest. “And such a handsome one too,” Austin said. He looked up and let his hand move up to Jon’s beard and he held his hand against Jon’s cheek. “It’s so good to be here with you in person again, pup,” Austin said, locking eyes with Jon. “I’m such a lucky master.”

 

Jon took a deep, shuddering breath. It had nothing to do with his long workout. He gulped heavily, anxious and excited. “Yeah Sir, I feel the same way for sure,” Jon said. His cock throbbed as he pressed against Austin’s firm torso, so lean and hard. “I’m the lucky one!” Jon said. He ran his big hands up and down Austin’s torso, feeling his youthful frame and firm muscles, and closed his eyes, overwhelmed by what he was feeling. He bent his head down so Austin could rub the side of his face and head more. He opened his eyes again and stared as Austin’s face; a short beard, a strong jawline, and glittering green eyes. “You’re so hot, you know that?” Jon sighed, feeling relieved to admit that.

 

“Heh, thanks dad,” Austin said as he scratched and rubbed his stepdad’s beard affectionately. “That means a lot coming from, stud,” Austin said. “And just think, we have two whole weeks of this.”

 

Jon sighed contentedly and wrapped his arms around Austin. They held each other like that for a full minute, breathing each other in, feeling each others’ heartbeats.

 

Finally, Austin pulled away. “Let’s finish with a big arm pump, hmm?” Austin said and pointed to the tricep pulldown machine. Jon just grinned and nodded.

 

Jon waddled over to the machine, wrapped his calloused hands around the rope, thrust his chest out, and started cranking out perfect reps, the entire weight rack flying up and down like it was nothing.

 

Jon huffed and growled with each rep; his rumbling, guttural grunts made him sound like a prized bull. Austin stepped closer and felt Jon’s enormous right upper arm hardening and flexing with each rep. “Yeah, you like getting bigger huh? Feels good to pump up these big arms for me?” Austin said, rubbing the sweaty mass of his stepdad’s tricep. The upper arm was unbelievably big, dense, and hard. Austin wondered if it was bigger than his thigh yet. He knew it would be sooner or later.

 

Jon grunted louder as he passed 50 reps, his chest thrust out with a fresh pump, straining the pathetic straps of his too-tight tank top. Fresh waves of musk wafted out from his pits with every rep.

 

“It’s – mmmph – really intense having you – rrrfff – here with me as I – ggrrrph – lift and get bigger for you – uuhhhff – Sir,” Jon grunted as his triceps pumped up more and more. His bulge, already obscene in his sweat-soaked gym shorts, tented considerably as Austin rubbed his arm. “You like it?” he groaned as he slammed the weight back down after his 100^th rep. Jon flexed hard, the definition and raw bulky size popping out even more. “You think I’m bigger than before?” he asked, his eyes desperate for approval.

 

“Oh yeah, pup, so much bigger. Now finish up with some curls in the mirror,” Austin said, leading the bigger man over to the rack of dumbbells. They were all custom ordered and went all the way up to 200lbs. “Grab those 100s. There you go. Now, shoulders back, elbows locked in, I don’t want to see any swinging. Good,” Austin said, directly his bull into perfect form as Jon started cranking out reps. “Give it a good squeeze and pause at the top of the rep, feel that mind-muscle connection.” Austin said, and held his hand on the hard peak of Jon’s left bicep.

 

“Like this?” Jon said, staring at himself in the mirror, making sure his form was perfect, eager to please Austin. His upper arms, which had to be 25” at least at this point, bulged in a rhythmic, almost mechanical precision, each rep perfect, each rep making his arms expand even bigger. Jon’s bulge tented even more as he noticed that the size difference between the two of them was even more dramatic than it was a month ago. He was getting so big, just what Austin wanted, and nothing made him feel happier than that.

 

“Perfect,” Austin said, squeezing the huge bicep. “So big, bull pup. Pump ‘em up more. Push through the pain. Get to 100 reps for me, come on!”

 

“Grrruuuuhh – MMMpphhh – UUHHHHPH!” Jon grunted louder and louder as he cranked out 100 perfect reps, filling the garage with guttural groans, sweat dripping off his face and elbows and onto the floor mats below, his eyes locked onto the mirror.

 

Finally he dropped the weights, which thunked to the floor. He turned to Austin, raised his arms, and flexed, showing off his hard-earned mass. “MMMphh, how’s that, Sir?” he groaned as he flexed, sweat dripping everywhere, his clothes soaked, his furry pits and chest radiating heat and musk.

 

“Good! Big!” Austin said, smacking Jon’s big arms. “Now it’s time to reward you for your hard work.” Austin pulled out a package he had been hiding nearby and he unfolded it. “4XLT was the biggest they had in stock, so I made sure to get that. But I think you may have exceeded even this size, stud,” Austin said as he held up a brand new polo shirt with his college’s logo as the chest patch.

 

“Mmmm I love it,” Jon said. He gripped the neck of his old tank top and tore, the shirt easily peeling in half down the middle, yielding to Jon’s power. “Thank you, Sir,” the musclebear growled.

 

“Put it on now, even though I know you’re going to soak it with bear sweat. We’re gonna head to the doctor now to get you checked out, and then it will be time for you to feed, huh?” Austin said as his bullpup struggled into the shirt. “Need some help there?”

 

“It’s… I can’t get it on,” Jon grunted as he struggled to wrestle the shirt on over his head. His range of motion was limited from his massive pump.

 

“Here, pup, let me help,” Austin said. “Poor guy, too big to fit into clothes. Better get used to that,” Austin teased as he helped adjust the shirt, yanking it down over his dad’s sweaty back and thick trunk.

 

“Grrrrr soon you’ll run out of things that fit me, son,” Jon mused. He stood to his full height again when the shirt was finally on.

 

“Haha, Jon I think you might be too big for 4XLT already,” Austin said, trying not to laugh. The shirt was stretched taut across his broad chest, each pec straining the fabric. The sleeves stretched across his massive arms, barely hanging on and cutting into his beefy biceps, constricting them a bit. The neck hole was too small and threatened to choke Jon until he reached up and ripped it a bit wider. Most noticeable of all, the shirt only came down to Jon’s belly button, struggling to cover the huge, round belly of the big musclebear. A sliver of furry powerlifter tummy protruded from the bottom, like dough popping out of a can.

 

“Doesn’t fit, Sir,” Jon said with a smirk, then raised his arms to flex. His biceps rose into thick, hard peaks. The sleeves pressing harder and harder against the massive muscle until they ripped simultaneously with a dramatic snap sound. “Heh, yeah!” Jon chuckled as he checked out his newly freed biceps and pumped them a couple times. He speed his lats wider, and his shoulders and traps bulged with power. The shirt strained to contain him, and it rode up even higher on his belly. He lowered his arms and laughed, the shirt staying stuck on his sweaty chest and belly.

 

“Heh, I think it’s perfect, pup,” Austin said and rubbed his stepdad’s round gut. “I think everyone is going to know how big you are when you wear this, including the doctor. And then we’re going to go out and get a BIG dinner, my treat,” Austin said.

 

“Mmmm sounds amazing,” Jon hummed, relishing Austin’s belly rubs. His cock thickened and swelled at the touch of his jacked, dominant stepson, tenting in his short, black gym shorts that revealed his massive quads and bulbous calves.

 

“So hungry,” he said, and on cue his huge belly rumbled loud enough for Austin to hear clearly.

 

“Well I’m gonna make sure to fill you up GOOD,” Austin said. “Let’s see how much you can pack away now that you’re even bigger!”

[lighterstill]

Mmmm so big! Your descriptions of Jon's size are so amazing. I can't believe he's already broken the 500 pound mark. I have a feeling it's only BIGGER and better from here on out.

[Toro]

Great story!

I need some details also on Jon roiding, if possible. Keep going

[spacevlad]

53 minutes ago, Toro said:

Great story!

I need some details also on Jon roiding, if possible. Keep going

I unfortunately don’t have a lot of specific details about that, mostly because of lack of knowledge about it in real life… but it would be hot to add a moment or two of Austin injecting Jon and getting excited about growing more. Might have to add a detail about that in an upcoming chapter!

[shadownexus]

I wonder what would happen if Austin suggested Jon to grow immediately

[Toro]

3 hours ago, spacevlad said:

I unfortunately don’t have a lot of specific details about that, mostly because of lack of knowledge about it in real life… but it would be hot to add a moment or two of Austin injecting Jon and getting excited about growing more. Might have to add a detail about that in an upcoming chapter!

Yeah. Nothing too technical. 
Since it is mentioned that Austin gave Jon also growth hormone and roids, I’d enjoy seeing Jon getting is full dose of roids as he did with food. 

[dredlifter]

I absolutely the love the dialogue in this story.  The pure greed Jon has for more size.  How he expresses how he feels being BIG.  And wanting to GROW.  When he states how small Austin looks as he gets bigger and BIGGER.  I love it.

[TopHairyMuscle]

Perfect l love your writing " so much parallel my real life with my obedient sub muscle daddy" you giving me ideas for me to use with him, thank you, please continue this,,