Nate tried to just go about his day after that, but he couldn't stop thinking about it. I mean, how the hell did Chris grow over a foot and a half taller overnight?! And his biceps were huge for his age...
Nate was snapped out of his thoughts at the sight of Chris walking up to him. And what a sight he was. The kid was still wearing his pajamas from this morning- His OLD pajamas, made for a kid half his size. The sleeves were practically ripped at the seams by those giant biceps, the front was skintight against those starter pecs, and there was a solid half a foot of midriff showing, which also revealed a thick happy trail. The pants clung tightly to his thighs, riding up halfway to his knees, they weren't much more than shorts, they made his thick legs look even bigger. It showed off his big, muscular ass, and Nate also couldn't help but notice the sizable bulge threatening to break out of the front.
Chris snapped Nate out of his thoughts by finally speaking. "Hey, bro, since I've gotten a growth spurt... Can we finally work out together?"
That's right. Chris had always pestered his brother about working out, but Nate had told him no, that they could when he was bigger- Partially because it was dangerous, and partially to keep Chris out of his stuff. But now one of those excuses were out the window, and he'd have a hard time saying no for the other excuse.
"Yeah, sure... Just be careful not to hurt yourself."
Chris smirked, and looked at Nate with an expression that said it all. Yeah, right, like those weights could even hurt him at this size.
Walking to the basement where Nate kept his personal gym, he caught a glimpse of the two of them in a mirror. Chris walking behind Nate, only 4 inches shorter than him, about up to his nose, and looking about as muscular as him- Hell, proportionally, he wouldn't be surprised if Chris was heavier. He laughed for a second at how much things had changed in just a day.
"Alright, Chris, you've never trained before, so we'll try to find your ceiling. Just start lifting these, and we'll work our way up until you're struggling."
Nate had laid out a bunch of his dumbbells out, starting with the 20 pound ones. Chris probably would've struggled to carry one of those with both hands just the other day, and now he's lifting two at the same time, as his floor!
Nate just stood and watched, mouth agape, as Chris effortlessly lifted the dumbbells, his biceps barely even flexed. "Is this it? This working out shit is so easy!" Nate flinched at hearing his brother curse so casually, but he was right- It looked way too easy for him.
Nate moved Chris on to the 50 pound dumbbells, and Chris lifted those without much more effort. Though he did see the biceps flexing this time... Actually, have they gotten even bigger?
"Okay, Chris, that's enough. You can try the bench press now." Chris smiled at that. The kid still hadn't even broken a sweat. Nate sighed as he loaded up his personal best- 200 pounds. He'd hit this ceiling for months now. It seems crazy to even suggest Chris try this, but he's already put on an insane performance, and hey, if anything goes wrong he can spot him.
Chris slid under the bar, and Nate once again had to do a double take. Chris' shoulders actually hung off the bench by an inch or two. Was he wider and broader than Nate was...? These thoughts were cut off as Chris put his hands on the bar, and Nate saw his muscles finally flexing, their veins popping, and Chris grit his teeth. He thought Chris had actually found his ceiling, that he was still weaker than Nate after all.
But then, Chris roared, and his guns flared, seemingly inflating at least an inch bigger, Nate thought. The sleeve tore off entirely, the button on his pajama shirt popped off, revealing the rock hard set of abs in all their glory. Nate also noticed that now there was a large tent rising out of the tight pants, threatening to explode out. But more than that, though, was the fact that he was lifting the bar- not just holding it up in the air, actually lifting reps of it up and down.
"MORE!!!" Chris growled out, his face red. Nate jumped a bit, his voice sounded deeper than it did a second ago, not much higher than Nate's own. But wordlessly, he complied, and sucked in a breath as he put two more plates on the bar, bringing it to 250 pounds... 50 pounds heavier than Nate's best, beaten by his 12 year old brother.
Chris did 10 more reps of this before finally slowing down, slamming the bar back in its place and standing up in all his majesty, practically steaming from the workout.
He walked right up to Nate, and Nate felt something was off. Glancing back to the mirror, he realized why. Chris was at eye level with him now... Only about an inch shorter. Chris shot him a devilishly handsome grin again, before holding out his arm and crushing Nate's hand in his grip.
Nate's eyes went wide with two realizations- Chris' biceps were at least 2 inches bigger than Nates. They had to be at least 18 inches- if they were tennis balls before, now they were big grapefruits. Second... That Chris' hand wrapped around Nate's. It was several inches longer, and bigger.
"Looks like I'm the stronger brother now."
Nate could only wonder what could happen next...