There is no way the two sisters can be together
One is older the other is younger
While everyone thinks that the older step-sister is more dangerous and authoritative, they have no doubt that the younger step-sister is very dangerous and should not be messed with.

“I’ve always wanted to implement methods on you, like our parents punished me when we were little and pulled my ears.now you'll see how it hurt me, while you always got away with it.
Shut up now and suffer"