Give a good and very hot punishment to my stepsister for disobedient

Here we go, Yole. - What are you doing here?

Well, I've come to tell you something. See, I'm going out and dad told me that you were grounded.

So you're not going anywhere.

You're gonna get locked up, I'm gonna get the keys, and when he comes, if he wants to get out, he comes out.

Oh, yes, Grandpa.