Speaking of not wanting to be treated like a little kid, through the mirror she gazed the belt a couple of seconds before curiosity won again.
*One more couldn't hurt...* she thought as she reached for the buckle, pressing the button up front.
This time the green light seemed even brighter with a deeper color than before. Rachel waited enthusiastically for the more than pleasant feeling of her body growing bigger adn stronger all around. And so it did! Her big knocker surged larger as they now easily surpassed the ones her mother had. Pointy nipples aimed perfectly towards anyone in front of her while not sagging one big.
As her ass now also grew a good chunk, her hips flared out, making her waist look that much smaller even though it didn't change one bit this time. While a thigh gap formed below her midriff, those same thighs were enhanced with many pounds of lean muscle as her calves stuck out a tad more. She felt a rush of energy flow through her arms, more than any of her electric power could ever provide as they too grew in size and got shapelier. Her already shredded abs pushed out some more as they somehow formed even more flawless bumps than before.
Right before the feeling fully subsided, her blue eyes began to glow, clearly indicating that even her unique trait got better still. She flexed some parts of her body, admiring how much stronger and more developed she looked opposed Veronica.
*Man does this feel good!*
Not only did it feel good, but it empowered her by so much more than even she thought. As stated before, the innocent man that grew to one of the biggest threads for her supermom was just some regular guy and not a superpowered being like she is. The belt had the ability to enhance powers, no matter if super or not, of the wearer. Just this normal man had gained enough power to compete with a superheroine, so what would happen if a superheroine like Rachel withdrew just as much power as the man? After 3 button presses, the guy had enough muscle mass to be seen as a bodybuilder. So now that Rachel had pressed it just as many times, how powerful is a bodybuilder-like superhero compared to a regular one? All things Rachel, her mom and probably the world would find out very, very soon...
*But this won't be enough. If I want to convince mom that she doesn't have to look out for me anymore, I'll need more.*
So without any more thoughts interrupting her actions, she pressed the button for the fourth time. After the second long shining light, the feeling came back, always better than the previous one.
Her pornstar tits grew bigger and rounder, now outgrowing a watermelon each. While her strength improved beyond even those of superheroes, her muscles had to visually show what they contained within. Obliques started to form around Rachel's perfect abs while her bulging legs increased in size. Her once tennis ball-sized bicep reached higher and higher into the air, now looking more like softballs.
Her body felt great. Never in her life did she think she'd ever become a superheroine like her mother. Now she was that and so much more. While her mother was already dreadfully strong to mere humans, Rachel was just that but five times stronger, easily knocking Veronica out of the park.
She felt good before, but now with a body like this she would've been sure her mom accepted her as a proper superheroine now, if it wasn't for the corrupting powers of the belt. It tricked her into wanting always more while clearly possessing enough power to do whatever she wants.
*Just one more time, for good measure..."
She pressed the button again, but this time something was off. The light it emitted wasn't green anymore, but a deep purple.
*Purple? What does this mea-*
She didn't have time to complete her string of thought as the pleasant feeling rushed through her body, but this one was so much stronger. The belt recognized the power Rachel already gained, so it had to step up and provide even more power with this and each future press of the button.
Faster than ever before, her melon-sized tits exploded in size. Soft, fleshy goodness the size of soccer balls dominated her torso. Well, that is if her body in general wouldn't be growing right now as well. Rachel gained another four solid inches in height, bringing her to 6'10". As her bubble butt and gorgeous hips were expanding in size, her narrow waist shrunk down some more as the abdominals and obliques on them grew denser and more defined. Her legs looked like they had the power to crush steel between them, even without their superstrength. Her biceps almost added half their size with this one button press. Even her superstrength got superpowered, now sounding more like it deserved the term ultrastrength. She had five times the strength of her mother before, but now that doubled as well. In a 1v1 scenario, Veronica would be obliterated by her overpowering strength.
As the intense tingling stopped as fast as it began, Rachel was left with a body not even two doses of the super serum could provide. But as incredible as she now was, Rachel had some more plans in mind...