"our parents lab.Since we just changed their reality to make them geniuses, they might be working on an invention."
Sure enough, when they entered their now huge basement, their parents had just finished working on a prototype power-source.
"Oh hey kids!You're just in time to help test this new power source we made for A.L.E.X." Said Danielle
(the mom)"It's a car battery modified to be powered by this small air tank. Now if our calculations are correct, there should be an infinite amount of air inside of the tank. But in order to be sure, we'll have to inflate you with it Donna! If it really does have an infinite air supply, it should easily get you up to the size of a parade balloon. If you're nice and cooperate, I'll even let you play inside your favorite video game again!I know you love to do that!"
"Sure thing mom!"Said Donna with a cheerful look on her face"Finally!"Donna thought,"For the first time in my new life I'm actually gong to be blown up! This is so exiting!"
"Alright sweetie! Take that tank to our testing room and inflate yourself. We'll be watching."
A.L.E.X and Donna walked into the test room and Donna noticed an 'X' was painted onto the ground. She walked over and stood on top of the X. Then A.L.E.X prepared the supposedly infinite air tank and stuck the end of the hose he attached to the tank onto Donna's big toe on her right foot and turned on the tank.
Donna jumped and yelped at the sudden burst of air that entered her body. She wasn't used to the feeling of being blown up, but that would soon change. She took a few deep breaths and tried to regain herself.She stopped dead in her tracks with anticipation when she heard a loud hissing begin as soon as the hose began to wiggle. Before she could realize it, air was making her taller.
Air powerfully flowed into her foot, and moved itself around her body. It found shelter in every piece of her body, and stretched her outwards as more air approached. She began to completely fill up, her arms and legs blowing up quickly at her sides, her skin feeling taut all over; including her head. She began to grow outwards in all directions. Her clothes stretched with her, surprisingly, as she grew. Her normally five foot body was reaching eight feet, and her arms, legs, stomach, head, tail, as well as her entire body were growing to match. However, she wasn't matched in all places; her body also began to grow a curve. Her breasts, butt and hips were expanding faster than the rest of her body! Her breasts had approached B Cup and quickly passed to C. However, that was from her view, as they were literally three feet wide and counting.
Her hips flared outwards and her butt expanded like balloons, stretching her pants around her bum.
She approached ten feet tall, her breasts were four feet wide, appearing to be D cups. Her hips and butt grew outwards and stretched the bottoms. Strangely, her clothes didn't seem to shrink around her, and continued to cover her. Her chest began to spawn a deep cleavage as she approached five feet wide, and her ass began to plainly show in her tight pants. Donna was in too much joy to think correctly and was absentmindedly looking at her arms as she billowed outwards like the worlds largest inflatable doll. Her head and hair surprisingly grew and matched her regular face, almost making her a perfect enlargement of her normal self, minus her increasing assets.
A.L.E.X, in response from his mother, pressed a few buttons and slowly increased the speed of the air release. It approached twice the speed it was currently at, not even a quarter of it's maximum punch.
Donna's eyes widened as she felt the pressure increase. With each second, she could feel herself stretching faster. Her sight was just straight out into the observation platform and she saw her parents taking notes. Her view began to stretch outwards and move upwards as she grew twice as fast as normal. She was twenty feet tall.
Her breasts were far past EE cups (Really nine feet wide), all her assets plunging outwards four times as fast as the rest of her. Her ass began to swallow the bottom of her pants as they approached the size of blimps. Her hips were approaching an unbelievably wide size, making her irresistible if it were her normal size.
A stretching sound came from all over her body as she felt the pressure from the tank adding even more. The air flow was four times as powerful as the starting pressure, and her sexy bits were pressing outwards at an uncountable rate compared to her body. Her nipples had grow into the size of a medicine ball and poked outwards through the overstretched shirt. Her 10-foot-wide breasts were incomparable to any normal sized breast. She was approaching 30 feet and growing faster than ever.
Within seconds she was at the target size of 32 feet tall, and Danielle radioed A.L.E.X to stop the inflation and check the amount of air that was still in the tank, it was still completely full. The tank really was infinite. A.L.E.X unplugged the tank from his now giant inflated sister and Danielle walked into the room holding the rest of the power-source and after putting the battery together, she opened A.L.E.X up and switched the two batteries. A.L.E.X marveled at the amount of new-found power running through his circuits, and he felt like he was ready to take on the world.