My Arabic step-Sister Gets PUNISHED

I don't understand why my step-sister is like this. Our parents are immigrants. Hard working immigrants who sacrificed everything to come to this country! All they ask is we be faithful, respectful and be diligent in school. It is not that hard. SO WHY IS MY step-SISTER THE WAY SHE IS???? She skips school. I know she smokes substances she should not. And She dresses like a whore! She is exactly the opposite of what a good woman should be! It drives me insane! It makes me want to THRASH her! Our parents are seeing some of the effects of it. They have tried to keep Aaliyah in check, to make her behave. But she simply does not listen. And our parents don't even know everything. I have heard...stories about what Aaliyah does with boys. Filthy...nasty...disgusting stories that I cannot believe are true. If our parents knew.... Aaliyah is disrespectful. She is dishonorable. And she is not going to get away with it anymore. If she comes home late again, dressed like a slut, then I will make CERTAIN that she regrets it. She will not disrespect me or our family any more! Nothing she says or does will prevent me from teaching her a step-SON