Nate slowly backed up with a terrified look on his face. "Wh-what??? How??? How did you j-just... grow like that???"
Chris smiled at Nate's fearful expression. He thought about telling him the truth; he received a drug that saved him from a deadly fever. But Chris was sworn to secrecy, so instead, he decided to mess with Nate a little.
"You really wanna know?" Chris said as he chuckled and paused for dramatic effect. "I'm a god."
Nate looked at him in shock. "Y-you're a god? No! No way! That can't be possible!!!"
"Yes, I am, little boy," Chris said as he began to walk toward his shorter older brother. "Think about it. Have you ever seen someone grow 2 feet in a matter of minutes?"
Nate shivered from intimidation as he watched his newly-sized younger brother approach him. Chris's 10-inch-long dick swayed back and forth hypnotically with each step of his giant feet, which made Nate quiver uncontrollably.
Soon later, Nate was backed into a wall, leaving him no choice but to watch Chris's giant body inch closer. Suddenly, when Chris was almost less than a foot away from Nate, he felt his body start changing. Once again, he was met with the exotic sensation of his body rapidly expanding in all directions. Chris's muscles began to enlarge, and what little body fat he had left quickly melted away until Nate's little brother looked like a massive, godlike young bodybuilder. His height skyrocketed, shooting from 6'3" to 7' and 7' to 8', leaving Chris nearly as tall as the ceiling. His height and muscles weren't the only things growing, however, as his 10-inch hard cock stretched further away from his body, growing until it stopped at 15 inches long. It gently brazed Nate's chin as he stood petrified against the wall as Nate watched his little brother inexplicably grow.
Once Chris's growth stopped, he breathed a deep sigh of relief as he looked down at Nate. "Do you believe me now, little bro?"
Nate struggled to find words. As if one time wasn't enough, he watched his little brother grow again into a hulking giant capable of crushing his skull with his hands. He looked feebly up at Chris's imposing body, noticing all his defined features. His muscles, his size. Everything was all too much for him. From Nate's point of view, Chris looked like... well, a god.
"Y-you're a god, Chris," Nate admitted.
Chris looked at him in surprise and almost burst out laughing. There was no way he could actually believe him, right? Chris smiled mischievously at Nate, knowing he could take the opportunity to have a little fun with him.
"Yes... you're right," Chris said, feeling a sense of power. "I'm a god... which means you will worship me."
"Worship you?" Nate repeated in surprise.
Chris's smile widened as he stepped closer to Nate, his massive frame looming over him. "That's right. You have to do everything I say, or else I'll do unspeakable things to you."
Nate's eyes widened in fear, but he couldn't help but feel a hint of arousal at the thought of submitting to his younger brother's godlike power. "O-okay," he said quickly, not wanting to anger Chris. "I'll worship you, Chris. Whatever you say."
Chris chuckled. "Good. Now get on your knees."
Nate quickly obliged and dropped down before Chris.
"And kiss my feet," Chris commanded.
Nate hesitated and looked up at Chris, but then he obeyed as he leaned back down and kissed Chris's powerful feet. Chris looked down in amusement as he watched his older brother, who was once taller, stronger, and bigger than him, worship him like a worthless peasant. Unfortunately, Chris felt unsatisfied, as if something was missing. He wanted to get back at Nate for all the years when he bullied him and treated him like a weakling. He needed to humiliate him more than he could ever imagine.
Chris squatted down and grabbed Nate by the chin, tilting his head to face him. He looked Nate dead in his eyes, holding him still with his giant hands. Nate gulped as he looked helplessly at Chris's fiery grin, wondering what he was doing.
Finally, Chris spoke. "As your god, I want you to know something,"
"Wh-what?" Nate stuttered, his mind racing with countless thoughts.
Chris then pulled Nate closer and talked into his ear. "You. Are. Mine. My own little slave. Do you understand?"
Nate was shocked to hear Chris say that. Even though Chris was a god in his mind, did he really want to submit to him in such a way? To admit ownership to his own little sibling? Nate looked at Chris one last time before he caved and bowed his head down.
"I-... I-I'm... yours," he said, leaving him feeling exasperated.
Chris triumphantly smiled as he held Nate in his hands. "Good. Very good. Now I think it's time to take things to the next level."