Six Months After Growth Spurt

January

Irwin hadn’t expected any of his cousins to show up to his 18th birthday party, but as the hour grew near, some loud banging on the front door sent chills up his spine. Warren and  Erick, his two bigger cousins, stomped into their house, bumping chests with Irwin’s older brothers Chet and Donnie.

Irwin eyed the massive men with envy; all four of them were over six feet tall and built like linebackers. Warren was a national rugby champ. Erick wrestled at a division 1 school, while Chet was a brawny hockey goon on his college team. Donnie, the youngest (but biggest) of the bunch was a competitive strongman, tipping the scales at well over 300 bulky pounds.

Irwin watched the massive men chugging beers in three manly gulps, letting out loud bass belches before slapping each other on their broad backs. He glanced down at his own scrawny body with a sigh.

“Damn, why is your brother such a damned runt?” Irwin heard Warren whisper to Donnie.

“I always forget he’s adopted,” Donnie said in a voice so loud he must have expected Irwin would hear it (not like his cousins and brothers ever respected his feelings). “I mean, he’s a damned vegetarian for chrissakes! And he’s always like, reading and shit.”

“You know,” Irwin’s dad Paul, who was filling his plastic cup from a nearby keg, said loud enough for all of his sons and nephews, Irwin included, to hear, “I saw some pics of Irwin’s birth parents and they were big folks.” Paul, a big viking of a man (whose genetics clearly helped make his biological sons such brutes) slapped Irwin on the back with his big hand, spilling Irwin’s diet soda all over his lap. “Maybe he’s just slow in developing?”

“Yo Irwin,” Chet barked as he filled up his beer and folded a slice of pizza before scarfing it down. “When are your buddies showing up? Or are we gonna have to drink this keg all by ourselves?”

Irwin sighed and slid his glasses up the bridge of his nose. He had no friends to invite. No one else was coming. Only the five biggest bullies of his life--who were family, albeit not blood--were there for the celebration of his adulthood. He would have rather spent it alone.

February

As Irwin hopped off his dorm room loft, he was shocked to hear a massive THUD when his feet hit the floor. He rubbed his eyes and looked around, confused: everything looked really… low. He turned around and was eye-to-eye with his lofted bed, which couldn’t have been right. He was as tall as the doorway!

“What the fuck--?” shouted Irwin’s roommate, Roger, across the room. Irwin spun around, most surprised by Roger, a sturdily built weightlifter, scrambling backwards against the wall, pulling his blankets up over his face. “Dude, who the fuck are you? Take whatever you want!”

“Roger, it’s me--” Irwin began, shocked at the depth of his voice: low and rumbly, from deep within his chest. “What the… what’s wrong with me?” he said, his eyes suddenly focusing on his body.

Good lord: his BODY! He was nearly as big as Warren! He flexed brand-new muscles and patted every rock-hard inch of his rippling form. He’d gone to bed a scrawny, bird-built man and woken up a BEHEMOTH! He took a step and heard a loud RIIIIIIP as his boxer shorts burst to shreds, a bigger cock than he’d ever seen in his life flopping out.

While Roger continued to whimper, Irwin bounded out the door, shocked at how wide his gait had to be to accommodate his newly thick muscular legs. His dorm neighbors backed away as the big naked man barreled down the hallway, the floor shaking with every heavy step.

In the bathroom his eyes went wide as he took in his new form: he was ENORMOUS! He’d never felt this good in his life. Somehow being so big just felt… right. He was shocked to realize that he didn’t have his glasses on, yet he could see clearly. He took a deep breath, expecting the normal morning wheeze he got from his asthma, but his lungs felt new and improved.

“Holy shit--who the fuck are you?” said a voice. Irwin turned as Taylor, a muscular stud he’d eyed from down the hall, stepped out of the shower. Irwin couldn’t believe how much smaller Taylor looked in comparison to his new size.

“Damn, I’m like twice the size of you!” Irwin exclaimed with a smile, flexing a cannon-sized arm and feeling its thickness and density with the other hand. Taylor backed away, tightening his towel around his waist. Irwin reached out to the 6’ tall blonde ladies man. “No, seriously, dude, hold your arm against mine! I want to compare!” Irwin didn’t care whether or not Taylor knew who he was (or that he’d tutored Taylor in math for their entire first semester). He was nearly intoxicated by the feeling of his power.

As his big hand grabbed Taylor’s much smaller, but still muscular, arm, the blonde man yelped. Irwin felt something--a tingling in his hand, something warm pulling off Taylor’s body as their skin connected. Irwin’s big cock jerked as he felt a connection form. Taylor was FULL of something, and Irwin felt a sudden hunger.

Irwin’s eyes went wide as he watched Taylor’s plump muscles deflate while his own body swelled with even more power. He grabbed a handful of his even-meatier pecs and roared.

Taylor’s towel, no longer tight around his much skinnier waist, slid to the floor, exposing the now frail and scrawny man’s physique to both of them. While Taylor sobbed, Irwin grunted. Both of them new that things would never be the same.

March

When Roger came home, Irwin was balls deep in little Taylor, plowing away. Irwin kept catching glimpses of his burly body pumping into the little blonde twink’s ass. Taylor squealed like a bitch as Irwin flexed just to admire his own reflection.

Roger sighed as the door slammed shut behind him. Annoyed at his roommate’s disapproval, Irwin grabbed his own discarded sweat-soaked boxers and tossed them across the room, all without breaking the rhythm of his big dick in Taylor’s plugged-up ass. Roger moaned as the boxers fell over him. As he yanked them off, it was clear he was trying hard not to express his disapproval. Irwin didn’t like that.

Finally, Irwin came, firing a mass load into Taylor’s ass. The little guy groaned as Irwin unloaded that pressure in his bitch’s ass for the first time since they’d started fucking. There was a loud POP as Irwin pulled out of his blonde boytoy and hopped off his bed. Roger sat at his desk, trying to ignore as Irwin approached.

“Hey Rog,” Irwin said, slapping Roger’s back so hard his earbuds popped out. “Yo, Rog! Remember back when you were the big man in here? Back when you would bring home random girls and guys and banging them while I tried to sleep?”

“Yes,” Roger said, wincing, clearly afraid to say more. These past two months since Irwin’s growth spurt had been difficult living. Irwin had thought of it as “training.”

“You got a problem now that I’m doing it?” Irwin stood behind Roger with his fists on his naked hips, his enormous chest thrust forward, flexing his groin muscle to make his dripping still-hard cock bob up and down next to Roger’s head.

“No,” Roger said.

“You know I catch you looking at me when I’m getting dressed,” Irwin said, making his big pecs bounce one at a time. He knew that, as soon as Roger turned around, the crunching and rippling muscle would hypnotize him. “How come you never want a piece of this big dick of mine?”

“Oh my god,” said Taylor from Irwin’s bed. His voice was a whole octave deeper than it had been just minutes ago, when he squealed with Irwin balls deep in his ass. “My muscles! I’ve got my muscles back!”

Irwin and Roger both turned to see Taylor, as big as he’d been before the day Irwin had drained him, sitting up in his bed.

“Yeah, but what’s with that big belly?” Irwin said. Taylor was his old studly self again, but with a gut as round and firm as a basketball.

Taylor slowly dropped down from the loft and patted the first ballgut. “Holy shit, my hips are so wide,” he said. “My gut is… so swollen… damn, my pecs are tingling too…”

“I wonder if… you’re pregnant?” Irwin said, licking his lips as he marveled at Taylor’s thickening body. Irwin raised a muscular arm behind his head. The sudden blast of manly musk from his deep musclepit overwhelmed the room--and his roommate. Roger shifted uncomfortably in his seat before reaching out for Irwin’s huge quad. “Shit, look at this, Taylor. My roomie’s desperate to get some of this action.”

As Roger, helpless to Irwin’s pheromones, stood up from his chair, Taylor flanked him on the other side. Irwin pulled the two athletic men close to his huge chest and patted them like they were his possessions--which, in a way, he knew they were now.

April

Irwin started his truck as soon as he saw the built 25-year old man pulling into the gym parking lot. “Nice ass,” he said, licking his lips as he watched the shorts-clad mounds of gluteal meat bounding with each step. Irwin pulled up alongside and rolled down the passenger window. He’d been sitting in the car with the heat on for thirty minutes; he knew exactly how thick the manly fog rolling off his enormous body was.

His target’s name was Ian. From social media sleuthing, Irwin had learned that he and Warren were old rugby buddies and now lifting partners. In fact, Ian had been on his way to meet up with Warren, had Irwin not intervened.

“You need a ride?” Irwin asked, watching the shaven-headed man’s face contorting as Irwin’s stink started to rewrite his brain.

“I, uh… well, I’m going to the gym…” Ian thumbed lazily behind him. Irwin smirked; the big lug probably couldn’t even remember who he was supposed to be meeting. Anyone who got a whiff of big Irwin soon couldn’t think of anything else.

“Why don’t you hop in, big man,” Irwin said with a wink. In the months since his growth spurt, he’d realized that muscleheads loved to be called “big man” by men who were bigger than they were. It was almost as effective a manipulator as his B.O.

Ian dropped his duffel bag right in the parking lot and climbed into Irwin’s truck, his eyes popping a little bit as he got closer to the giant. Irwin smiled as Ian’s eyes scanned his form, stopping at the massive pecs he could barely squeeze behind the steering wheel--as well as the overstuffed bulge down below.

“You know my cousin, Warren,” Irwin said, flexing his arm and dropping it within inches of Ian’s shivering frame. The weightlifter’s eyes went wide as he leaned in and sniffed the thick muscle, his tongue lapping gently at the rock-hard peak.

“Mmph,” Ian said as his brain short-circuited from being in such close proximity to such a muscle stud.

“I want you to send him a message,” Ian said, his voice low and soothing. With his other hand he grabbed Ian’s head and shoved it into his deep musclepit.

Ian’s groans only served to tickle Irwin, who moaned as the much smaller stud writhed in his grasp. With a sudden flex he could pop this big man’s head like a grape, he knew, but he didn’t want to kill him. Just to send a message.

Ian’s hands were groping everywhere when it began. Irwin grunted as he felt Ian’s mass drain into his own body. When it was over, Irwin had to nearly pry the suddenly stick-thin man off his swollen frame, shoving him roughly out the door into the parking lot. Ian cried and whimpered as his suddenly frail form hit the parking lot--not from the impact, Irwin knew, but from being detached from his new muscle god.

“Tell your lifting partner that Irwin did this!” Irwin said, blowing the bald-headed waif a kiss before rumbling his truck’s engine and peeling out of the parking lot.

May

Irwin’s fingers were almost too thick to use his phone, especially since one hand was on the back of the head of the little roidfreak slobbering over his titanic quads. Still, he was able to start recording, craning the phone so the dark spiky-haired bodybuilder’s face in the frame as he gave Irwin’s hulking physique a tongue-bath.

“Hey Donnie!” Irwin said into the camera as he made his pecs bounce. “This little juicemonkey says he’s your boyfriend. Isn’t that right?”

Irwin released the head of the thickly built, rippling man straddling his leg. What was his name? Ray? SOmething like that. Ray looked at the camera with a bleary-eyed, unfocused gaze. He seemed to be drunk on lust for Irwin. He just murmered in assent, then pressed his face in the deep crevice between Irwin’s pecs.

“I want you to watch, Donnie, as I make your champion bodybuilder boyfriend into a skinny little twink… and make all his mass mine! That’s what you want, right, bitch?”

Irwin pried Ray’s head out of his pec cleavage for only a moment. The musclebloated little freak just nodded, then dove back into his muscle feast.

“Oh, yeah,” Irwin said as Ray’s body started to deflate. The hypnotized man didn’t even react as his hard earned, superheavyweight physique was drained of its dense, hyperdeveloped musculature. In minutes he had gone from a meteor of muscle (impressive to anyone BUT Irwin, of course) to a ripped underwear model. Shortly after, he was a bony-limbed nerd, his adam’s apple the only bulge on his scrawny body.

“You like that? You still gonna ride this guy’s cock when he’s smaller than my pinky?” Irwin taunted, so wrapped up in his total domination (and his still-growing muscles) that he hadn’t realized that Ray had begun to flail frantically. The struggling was so weak it barely registered to Irwin--until, with a gentle puff of air, it was gone.

Irwin stared down, somewhat shocked, as he saw Ray’s jockstrap empty on the floor. He picked it up and sniffed it. The air still smelled like Ray, but he had winked out of existence. “Holy shit!” Irwin barked. “I drained every bit of him! He’s in me now! Fuck yeah!” He flexed his newfound brawn with joy, then sent the video to Donnie.

June

“Turn around,” Irwin ordered. “I want to see all of you.”

Erick grimaced as Irwin twirled a finger in the air. He didn’t even want to see his body now, much less show it off to Irwin. The fact that his muscles had sprouted once again on his frame did nothing to comfort him. As Erick turned, it was clear his swollen gut was throwing off his center of balance.

“Nice and pregnant,” big Irwin said, rubbing a big thumb around Erick’s spherical gut. The wrestler groaned at Irwin’s touch. “Yeah, very sensitive. Your pecs are going to get crazy sensitive too. As they swell up, and fill with milk, you’re going to go crazy when just a strong breeze brushes up against them.

In the past hour, Irwin had busted down Erick’s door, overpowered the experienced grappler, and sucked the mass right out of him. Even shocked at his sudden weakness, Erick was more than happy to slobber all over Irwin’s giant cock. He was more than happy to take it in the ass, especially when Irwin promised he’d be returning the stolen muscle to him. But now, as Erick patted down his suddenly thickening hips and gazed down at his slightly-bigger pecs, it was clear the champion wrestler had never felt weaker.

“See, that’s what my power does,” Irwin cooed, yanking Erick’s arm into the air and dragging his big, thick tongue from the smaller man’s waist, along his armpit, all the way up to his quivering hand. The now-pregnant athlete whimpered at the sensation. “I drain all your power from you, but when i give it back, you get a little something extra… my seed, growing inside you.”

Irwin lifted Erick--still a 6’, 260-pound barrel-built man--onto his lap like he was nothing (because, to Irwin’s mindblowingly huge frame, he truly was now). He patted Erick on the head while the wrestler cooed, lost in the sensations of his rapidly changing body. “Your hips will fill out… your pecs will quadruple in size. Your butt will be HUGE--and you’ll be a thousand times sexier to me. And all in service to my baby, growing inside you. How do you like that? What do you think about old Irwin now?”

Erick just moaned, gently rubbing his swollen gut and leaning his head lovingly against Irwin’s boulder-sized pec.

July

Chet’s lower lip quivered as he looked up at all 7’5” of Irwin, whose musclebound body stretched all the way to the ceiling. The goliath had to squat just to squeeze through Chet’s front door. “You had to know it was coming,” Irwin boomed. He cracked his knuckles and Chet whimpered--not from fear, Irwin knew, but from his powerful musk filling the room, intoxicating the thickly built athlete.

Chet probably expected Irwin himself to pounce on him--with the beast’s long arms, he could have snatched him up from where he stood--but Irwin didn’t do his own dirty work anymore. From behind him, Taylor and Roger emerged, followed soon after by Ian, Warren and Donnie. All of them looked like champion strongmen know: wide, barrel-shaped torsos, thick arms and legs so pumped they were nearly inflexible, all with massive keg-bellies, swollen with Irwin’s progeny. Their muscles had all swollen even more since Irwin had impregnated them. If not for their new instincts kicking in from the hormones flooding their brains, they probably could have been olympic-level strongmen. But now, each of them only wanted to serve their god, and protect his offspring.

Warren and Donnie each grabbed one of Chet’s arms. The hockey forward struggled, but Taylor and Roger quickly grabbed his feet and hoisted him up.

“Don’t, just yet,” Irwin boomed. “I want him to beg me to do this.”

Chet just whimpered. Every one of Irwin’s harem knew that his will couldn’t hold out forever.

“Beg me to impregnate you, Chet.”

Chet’s breathing was ragged now. “God, you smell so good,” he moaned.

“You like all this mass? I’m bigger than all my brothers and cousins squashed together now.” Irwin’s chosen ones turned Chet around to look at the mammoth man as he flexed his incredible arms and stomped a powerful foot so hard the whole room shuddered. Chet was hypnotized as Irwin wobbled his enormous quad back and forth. He struggled against the men holding his arms, but this time it didn’t seem like he wanted to escape. He wanted his hands on Irwin’s body.

“Who knows where I come from,” Irwin grunted as his harem released Chet, who crawled on hands and knees to the titanic man and gazed up at him with wide eyes. “I bet I was born the way all my sons will be--I bet my ‘big father’ drained some big stud, and made him his bitch, filled him with his seed… And then out I popped. But all my babies are going to have me to raise them up, big and strong, to teach them how they work. They won’t be an 18-year old in college by the time they figure out how to rule this world. They’ll be powerhouses before they’re fifteen years old. And anyone big enough to stand in their way better watch out…”

“It’s awesome,” Warren said, squeezing the nipple on his massive musclepecs, so big he looked top-heavy. “My pecs are so big I can only fit into 5XL shirts, and the milk that comes out is like protein shake.” He scooped a dollop of what squirted out on his finger and lifted it to his mouth. “It’s mega-anabolic. Until the babies come, we’ve been feeding it to each other and growing HUGE.”

“You ready to join my harem, Chet-boy?” Irwin said. But Chet wasn’t listening anymore. He had already thrown his legs back, exposing his hole for Irwin. Sweat poured off Chet’s body as Irwin pulled back his 3-foot-long cock and let it flop down, smacking Chet in the face, spewing a burp of precum along him. Chet licked the shiny spatter, his hole twitching as he tasted his new master’s semen.

“He’s ready, boys,” Irwin said, so grateful to have such well-built men in his family. He was excited to pass their genetics, as well as his, off to his sons.