Big Boy Undies 6
“Okay Xander, what a fine mess you’ve gotten yourself into.” The man muttered to himself.
He was in a bit of a bind. His parents had dropped him off to spend time at his older brother's penthouse, while they explored the city. Which meant a week of Jeremy and Xander shenanigans, no parents. One small problem: Jeremy was a late sleeper, not even waking until 11:00, which meant Xander, still on school time, would rise earlier and be responsible for his own boredom. As any self-respecting younger brother, why wouldn’t he mess with his brother’s stuff. He was never allowed in his brother’s room before, but now the entire place was his brother's room. Still though, nothing beat creeping into the actual bedroom and rearranging his brother’s personal items. But hey, brothers fucked with each other.
He was shocked when riffling through the underwear drawer, coming across a strange looking set of underwear, just a strap and front part. Curious, he balled it up and snuck out with it. Back in his guest room he looked at the weird underwear. Not even the slightest clue when his brother would even wear something like it. Though he was a teen on a mission: to find out the mystery of the underwear. He got out of his pajama bottoms and slid into the mystery wear. It was easily triple his size. He was just hoisting it up with the straps.
Then it happened.
Xander’s body exploded bigger and he grew several feet. His shoulders separating was the most frightening, but his pecs popping and swelling was the most euphoric. In his head he was bombarded with memories of his older bro, wearing the jockstrap (that was the name!), on nights he went to pick up men from clubs. It was either to show off his ass or highlight his bulge. Xander hadn't known his brother was gay, but now the image was so clear in his mind. In response, Xander's own ass quaked, cheeks clapping to life as they grew alongside his thighs and filled in the jockstrap.
Xander watched his reflection in the penthouse window morph into a much older visage. His jaw firmed up as scruff and then undeniable hair formed a beard and mustache on his lower face. His arms got bulky and packed with power as he saw visions of his brother’s workouts at the downtown gym. Lastly his cock, nudged, poked, then stretched out his brother’s pouch, cock not just sitting heavy, but hard. Ink like his brother’s tattooed itself across his skin. He could name each one and when he’d got them, though they hadn't existed prior. Xander didn't just look older. He was older, a man similar to his older brother. When his balls started producing the same enriched seed. He came right away, all over his brother's floor.
An hour later, though Xander was older, his clothes weren’t. He tried getting dressed in them. His tank refused to go past his pecs and his pants couldn't make it past his thighs. An absolute unit of a man trying to stuff himself into a kid’s outfit. His older brother came in, yawning as he looked down at Xander by the window struggling.
He was in a bit of a bind. His parents had dropped him off to spend time at his older brother's penthouse, while they explored the city. Which meant a week of Jeremy and Xander shenanigans, no parents. One small problem: Jeremy was a late sleeper, not even waking until 11:00, which meant Xander, still on school time, would rise earlier and be responsible for his own boredom. As any self-respecting younger brother, why wouldn’t he mess with his brother’s stuff. He was never allowed in his brother’s room before, but now the entire place was his brother's room. Still though, nothing beat creeping into the actual bedroom and rearranging his brother’s personal items. But hey, brothers fucked with each other.
He was shocked when riffling through the underwear drawer, coming across a strange looking set of underwear, just a strap and front part. Curious, he balled it up and snuck out with it. Back in his guest room he looked at the weird underwear. Not even the slightest clue when his brother would even wear something like it. Though he was a teen on a mission: to find out the mystery of the underwear. He got out of his pajama bottoms and slid into the mystery wear. It was easily triple his size. He was just hoisting it up with the straps.
Then it happened.
Xander’s body exploded bigger and he grew several feet. His shoulders separating was the most frightening, but his pecs popping and swelling was the most euphoric. In his head he was bombarded with memories of his older bro, wearing the jockstrap (that was the name!), on nights he went to pick up men from clubs. It was either to show off his ass or highlight his bulge. Xander hadn't known his brother was gay, but now the image was so clear in his mind. In response, Xander's own ass quaked, cheeks clapping to life as they grew alongside his thighs and filled in the jockstrap.
Xander watched his reflection in the penthouse window morph into a much older visage. His jaw firmed up as scruff and then undeniable hair formed a beard and mustache on his lower face. His arms got bulky and packed with power as he saw visions of his brother’s workouts at the downtown gym. Lastly his cock, nudged, poked, then stretched out his brother’s pouch, cock not just sitting heavy, but hard. Ink like his brother’s tattooed itself across his skin. He could name each one and when he’d got them, though they hadn't existed prior. Xander didn't just look older. He was older, a man similar to his older brother. When his balls started producing the same enriched seed. He came right away, all over his brother's floor.
An hour later, though Xander was older, his clothes weren’t. He tried getting dressed in them. His tank refused to go past his pecs and his pants couldn't make it past his thighs. An absolute unit of a man trying to stuff himself into a kid’s outfit. His older brother came in, yawning as he looked down at Xander by the window struggling.
Then without a word, Xander’s older brother turned around and went back to bed.
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