Lemme type

So my step sister has autism. I’m her big sister but she’s older then me. I get that she autistic but I blame her mother for telling her that she can have everything and get her way all the time. Btw her name is Maddison. She is nasty. I can not be happy if she’s home. They haven’t even gotten her potty trained and she’s ****ing 14 years old.😑 when she eats she can’t burp herself so she sticks her fingers down her throat and throws up. She can’t talk. Ok well she can say a couple of words but most of them sound like an alien. If one of us can’t understand her, she puts her thumb in her mouth and bangs her head on the floor or anything she can bang it on. It so embarrassing to go out in public with her because she throws a frickn fit. I just hide my head.