With strong powers comes strong drawback

Katy closed the book and watched the world change around her. The employees of the coffee shop were now wearing miniskirts and low neckline skin tight shirts as work clothes. The girl could see that they had not any bra, so it probably wasn't allowed. And one of the waitress had a little belly from an early pregnancy.

The men didn't change in looks, but their attitude were openly misogynistic. One of them slapped one of the girls ass and got a high five from his friend. The girl next to him had now a tube top and was drinking her coffee without a word.

"The other day, I was banging that chick in the ass, she was so loud the neighbor banged at the wall. She clearly loved having a meat rod in her back door, despite saying to not go there when we started..." Said a guy behind Katy.

"What a slut ! Ahah !" Commented another one.

Then, the girls clothes changed. Her jeans turned into a red skirt stopping just above her knees, her shirt became a pink top with a V-neck stopping between her breasts, she felt her panties and bra disappear, and her running shoes became high heels sandals.

Then, the memories of this world came... Katy learned that underwear and pants were not a thing in this country. Women having to be ready for any men, anytime, it wasn't practical to wear them. Contraception for women didn't exist, and unless a woman was claimed by a man as his own, she could have a kid with any of them and had to raise it alone if it's a girl or by the state if it's a boy. Women were not exactly treated as slaves, but more as stray cats. They were technically free, but didn't have access to anything of importance, including school. So, most women couldn't read or write, and knew, at best, basic calculus. Like stray cats, men could take one into their home as long as they wanted and cast her out at any time. That's why, claimed women were doing everything possible to stay in those comfortable homes, cleaning, cooking, and any sexual favor the master of the house fantasized about. Claimed women were often considered as depraved sluts by stray women, just by jealousy.

Katy then knew what was her superpower. She had the ability to alter her body in a way that she could change her appearance into any human woman. Plus, that ability allowed her to alter her body enough to enhance her stamina, speed, reflexes and strength above any world champion athlete. And also she was able to regenerate wounds by reversing them into healthy tissues, which made her able to heal even deadly wounds in few minutes as long as she was still conscious.

Thanks to that power, she had the day to day appearance of a 5'1 short haired redhead with freckles and B-cup breasts.

And when she was heroing, she had her alter ego, who was a 6'2 curvy black girl with long black hairs, walking defiantly in latex underwear.

The drawback of that incredible power was that it was only active for five to eight hours after she had sex with a man and he came in her ass or pussy, or she swallowed fresh cum. The time varied depending on the amount of cum absorbed and how much she was using her transformations and regeneration.

Because of that power and its draw back, she called her alter-ego, demonia, referring to the succubus demon.