Jack opened his mouth to speak, but before he could say anything, there was a knock at the door.
"Hey, it's me." Johnny recognized that voice. It was Cerise! "Are you guys in there?"
"Cerise!" Johnny squeaked with Jack's deep voice. He called out meekly. "Y-yes, we're inside!"
Cerise perked up as she heard Jack's baritone rumble from behind the door. She'd always thought men with deep voices were sexy. "Would you mind opening the door for me?" She asked as sweetly as possible. "It's locked."
"Yeah, just, give us a second." Johnny's words were cut short as Jack leapt up and slammed his hand over his brother's mouth, shushing him. He didn't like that he had to stand on his toes to do so, and he liked even less that Johnny was able to push him away so effortlessly. Those were his muscles, damn it!
"Dude, we can't let her in here!" He whispered angrily to Johnny. "We have to fix this."
"I don't know if I can fix this right now and I can't just leave her standing out there!"
"Well then tell her to go away!"
"No!" Johnny cried, a little too loudly. He blushed self-consciously at how much power his new pipes had and lowered his voice again. "She's a guest, Jack. It would be rude."
"Johnny I think that us being in the wrong bodies is a little more important than your fucking schoolboy crush." Jack couldn't believe how crazy his brother was acting. He didn't want to spend any more time in his brother's scrawny body than he needed to, and he especially didn't need an audience.
Johnny knew Jack was right, the situation was crazy and potentially dangerous. He couldn't meet Cerise looking like this! Or... could he? He felt his cock stir in his pants as he thought about it, as if to remind him of the impressive tool he now had at his disposal. Suddenly it all clicked into place for him. "Well..."
"Well what?"
"Well tough!" Johnny snapped. "It's my machine, I'm the bigger brother now, and I say we let her in. What are you gonna do about it?"
The two glared at each other, each daring the other to back down. This had been a familiar scene in the Mack household growing up, the two boys at odds with each other. Jack as the much bigger brother had always won, of course, but the tables were turned now. His biggest advantage (and everything else big about him) had been transferred over to his brother, who was quite literally flexing his power (and muscles!) for the first time in his life.
"Alright." Jack said finally. Johnny grinned. It felt good to be the big man! "Then we need a plan."
"You're right. What do we do Jack? What do we tell her when she comes in?" Johnny looked to his big brother, who had planted himself at his desk with a pouty expression. Johnny made a mental note to never do that once he was back in his body because it looked ridiculous.
"Don't ask me! You're in charge now, right?" Jack rolled his eyes. Johnny had picked a really bad time to stand up for himself, and if he wanted to call the shots, fine! Jack wasn't gonna make it easy for him.
Johnny considered the situation. He wasn't sure if he could effectively pretend to be Jack. Looks would only take him so far, and Johnny knew he was still his awkward self underneath all of the muscle, and no matter how big his dick was he knew he was awful at talking to girls. He knew that with the handsome visage of his brother his chances with Cerise would skyrocket, but Cerise might still think he was a freak. He could tell her up front about his new device/what it had done and hope that she'd be impressed, or he could pretend to be Jack and hedge his bets that way.
And, of course, there were Jack's feelings to consider. Could he trust Jack not to embarrass him using his own body?