Being in the criminal life style wasn't something that she wanted to do but desperate times called for desperate measurements.
After her mother's died I guess a part of her died as well and made her adopt to something more than being a smart cute teenager.

One of Beauty's employees finally got her attention after countless times of calling her name.
"Let's go homegirl"
"We've got to be on time and point"

Beauty took a deep breath and replied
"Okay.Let's go."
They all got suited up

Two days later the entire world was in shock at the a heist that was perfectly done and well planned out.