David and Davin, twin brothers, hopped into the bus headed for the city with their dad's invention in hand and mischief in mind.<br /><br />--------<br /><br />Earlier this morning they overheard their father on the phone with his colleague from the lab. The two boys came close to the basement door to eavesdrop on their conversation.<br /><br />"Luke, thank god you picked up. Look I don't know how to say this but, the prototype worked. Yeah, I know I wasn't supposed to take it home. Yeah, yeah, I know but they were going to destroy it anyway. They thought it didn't work but they just didn't know how to use it. How do I know it works, well I think you just need to come over here and have a look for yourself. What do you mean, ofcourse I used it on myself. Who was I going to use it on, my kids? No way. Well, I mean the last person I saw that night before I left was our receptionist. You know her, the one with massive tits. What no, get out of here, I'm not gay. I just had no other choice. Look, do you want to see the prototype in action or what?" their father went on from the basement.<br /><br />"I think Dad's finally lost it dude," David whispered.<br /><br />"Huh? Sorry, I'm still thinking about their receptionist since he mentioned her," Davin laughed quietly.<br /><br />"You just have to fire the prototype at the target you want to 'copy' with the black button, then you aim it at the target and press either the red or green button. No, if you press the red button nobody but the person holding it will notice the changes. If you press the green everyone will notice the changes. Which one did I try, good question. Shit, I think I pressed the red one, I can't remember. Just tell me if I look different when you get here. Alright, I'll see you in an hour then. No no that's perfect, it's give me time to umm observe the changes. Okay cool, ring me first when you get here, in case I'm pre-occupied. Okay, bye." their father ended the call and began coming up the stairs.<br /><br />"Shit dude, hide!" David said, pushing Davin. They made it to the other side of the kitchen in time and hid behind the table. The basement door opened softly and their father peeked his head out surveying the surroundings. When he thought all was clear he stepped out and adjusted his massive breasts encase by a skimpy halter top. He then straightened his black mini-skirt and adjusted the thin black thong that peeked out. He then turned and rushed towards the master bedroom and locked the door.<br /><br />"Dude! Dad's acting weird," David said scratching his head.<br /><br />"Yeah dude. Is it me or he's dressing more slutty lately? His tits are about to pop out of that top, gross!" Davin said as he scrunched his face in disgust.<br /><br />"Enough about Dad, I want to see that prototype he was talking about," David said as he gestured towards the basement. The two brothers headed down to the basement and looked at their father's desk. There was a little remote looking device, with a little antenna at the top and three buttons on the side, one on the left and two on the right. "What the shit is this? A toy?" David picked up the device and looked at it closer.&nbsp;<br /><br />"David, I hear the front door dude! I think mother is home. Let's get out of here," Davin said rushing up the stairs. David, instead of putting the device down, put it in his pocket and darted up the stairs.<br /><br />"Honey, where are you?" their mother yelled out. She walked towards the master bedroom and without knocking, opened the door. "Oh my god Albert! You sex kitten, how could you start without me!" their mother said as she closed the door behind her.<br /><br />"Aww dude gross! They're gonna scissor. Lets get out of here!" Davin said and he and David left the house.<br /><br />--------<br /><br />The twins boarded the bus and sat towards the bus.<br /><br />"Why are we going to the city again dude?" Davin asked.&nbsp;<br /><br />"Because the city has heaps of people and is far from our house. If something was to go wrong with Dad's prototype, at least its away from home. Gosh dude, that's why I'm the smart twin," David said as he took the device out from his pocket.<br /><br />"What the shit dude. You actually took it! Dad's gonna kill you!" Davin gasped, "You don't even know how to use it!"<br /><br />"Dad's not gonna kill me. I'm testing his device further, I reckon he'll thank me instead. Plus he's too preoccupied with Mother right now," David said and shuddered at the thought of his parent eating each other out. "Now what did Dad? Point it at a person you want to copy and the fire it at someone else, right?"<br /><br />"Yeah I think so," Davin said. The twins looked around the bus for someone they could copy. Just then the bus stopped and a woman got up to step off. She was wearing a top with a plunging neckline, her massive breasts almost spilling out. Both boys stared, drooling at the sight.<br /><br />"Holy shit dude," Davin exclaimed. He heard a small click and saw David was pointing the prototype at the woman.&nbsp;<br /><br />"Dude did you see that chick, her tits were massive!" David smirking.<br /><br />"Oh man did I? Those things were amazing!" Davin replied back. He watched as David turned towards him, prototype pointed at his chest.<br /><br />"Oh so you wouldn't mind having them then!" David said intending to press the button. Davin, reacting quickly, grabbed David's hand before he could press the button. They wrestled for a few seconds and then they both heard a whirring sound come from the device.<br /><br />"Dude, you broke it!" David said inspecting the device. He looked at Davin, who was staring with his mouth open, "What are you looking at?"&nbsp;<br /><br />"Holy shit! The prototype works!" Davin exclaimed as he pointed at the sleeping man by the window. When they got on that man was already in the bus sleeping. He had the body of an MMA fighter, muscles bulging from his tight shirt. Now, instead of his chiseled African American body, below his neck was the soft, pale skinned body of the MILF that David targeted earlier. His new breasts threatening to spill out of his new top.<br /><br />"Bro, that's pretty messed up. Now he has tits as big as Dad's haha," David snicked watching the man's new bossom rise up and down as he breathed.&nbsp;<br /><br />"Which button did you press?" Davin asked.<br /><br />"I dunno, you tried to grab it of me!" David responded.<br /><br />"You tried to give me tits bro!" Davin said loudly.&nbsp;<br /><br />"Haha yeah I did. Sorry dude, just wanted to experiment. Promise I wont do it again, now that I know what this baby does. I can't wait to get to the city," David said thinking of all the swapping they could do.<br /><br />"Well let's see if Mr. Tits there wakes up and notices the changes first. Don't want him going on a rampage," Davin said still watching the man.<br /><br />"Yeah alright then. But man, I'm getting hard looking at those tits. Is that bad?" David said. Davin just shook his head.