Whore Step Sister XXX under my control

My sneaky step-sister is always trying to hurt me. She does things because she's prettier, shes smarter, she has huge tits, and she gets all the men. She will go after men I like, she will try to wear my clothes but her tits always stretch them out making her look even sluttier. I found out that she has taken this jealousy towards me or whatever it is a step further. I found my step-sister's naked body all over my boyfriends phone. I have had enough of her.. I go into her room furious and confront her. Of course she denies everything and she dismisses me and keeps blowing me off. I get so mad.. I can't beieve she would lie to me, hurt and deceived me. I get so angry I tell her she has messed with the wrong chick. Even if I'm her step-sister she needs to be taught a lesson.