I'm going to kick my sister out.
Why do you want to kick your sister out?
My parents would be upset if they knew she was staying in my room.
Your sister is your parents child, too. Maybe talk to them and see if her staying in your room is an issue for them.
Fuck my parents, I'll kick her out when she's sleeping.
If this is your parents home, this doesn't seem like it's your place to kick her out. Let your parents make that choice,