The way my sister treats me

Something is wrong with they way my sister treats me 🥲🥲. She doesn’t talk to me at all , doesn’t speak to me at all, and when I say something to her or ask her anything she dismisses me , if I ask about the WiFi code , or what happened to the microwave yesterday or anything she says idk , when she clearly knows the answer. I turned the ac on and she asked my mother who did it knowing I did. She then keeps saying who did it that was stupid out loud knowing I’m the one that turned it on, next thing her clothes were Done in the washer , so I moved her clothes on top and started my load. She then said my clothes are still in there so I told her her’s were done. She then said I KNOW THEY WERE DONE loud and rude. Next I let my nephew watch coco melon on her laptop and when she saw me sitting beside him she picked the laptop up saying are you on the guest account or signed in under me. She then started saying she doesn’t want him on her laptop, if he breaks something I’m paying for it , in reality she actually doesn’t want me on her laptop 💻, he was watching videos on it all day but when I touch it to turn on a video for the baby she gets angry. Then in the same day I asked her what happened to the microwave cord because it looked burned like a fire and she idk I wasn’t here so I said okay I’ll use it but stand back in case something happens. Then she yelled to my mother out loud what happened to the cord I need an answer now. This all happened in the same day .