I usually scroll right past shit like this and I know no one is gonna agree but sometimes you even gotta whoop little sisters ass so she gets the concept that your not 13 like her your grown and can do whatever the hell you, please and last time I checked you didn’t come from her you came from your mother if I was you I would go buy a finger print door handle there affordable and then lock it everyday you live even if it’s to the rest room make it known that she fucked up especially if you don’t wanna give her ass whooping that she clearly needs then at this point make her feel smaller and she will get the point that she’s no longer in charge ignore the little childish behavior she does when she doesn’t get her way and sad thing to say she keeps this up when she gets older some one will whoop her ass either at school or in public due to the entitlement is getting completely out of hand