Sister and mirrors

My sister won't quit using my bathroom! I have told her countless times it's my bathroom and to ask permission to use it or don't use it at all! She constantly uses my bathroom mirror. What's fucked up is that I FUCKING BOUGHT HER A MIRROR FOR CHRISTMAS YEARS AGO! It's a full tenth mirror that you can hang on your door. USE YOUR OWN FUCKING MIRROR YOU EGOISTICAL BITCH! What, is the mirror not big enough for your fat narcissistic, ego-maniacal head with your ass to match?!!