How to get revenge on my "evil stepmom"?

Ok, well my dad has this new girlfriend, and she recently moved in with us...(i'm 14 by the way), and she is a complete *****!!! she is always rude, she has a brat 3 yo that she never disciplines, and she seems to be a sort of "gold digger", her catch phrase is basically, "Get me a beer"(whiny voice) and when someone refuses, she opens her mouth in disbelief....URGG!!!!!!!! And she barely makes enough money to survive, and she stole some of my money for "gas", and a month later when i found out, she said she was planning to repay me....(*****), and she does absolutely NOTHING!!!! My poor hard-working dad pays for everything, even when we were struggling to get by without her lazy fats!!! and her ***** *** brat son!! so...as you can see...she is...um..a no good, *****, whos life is a counterproductive wasteland of boose and gold-digging, so...I simply want a way to get revenge on her, and her bitchi-ness.....plz only that, no comments...