If she wants to be treated like an adult, she’ll have to put on her big girl panties and stop being such a brat.
To girls, emotions are like semen, and if they go too long without some kind of release, they slowly begin to go insane.
If she likes to be lightly spanked, you spank her until it hurts.
If she likes to be spanked until it hurts, spank her until her butt is red raw.
Only when she is forced to directly confront the consequences of her actions will she grow as a woman.