I have a twin sister named Adalia. Adalia and I are 11 years old. We used to share a room, but we recently moved so we both have our own rooms. Anyways, my sister and I have always been good friends and stuff, but something happened in school a few weeks ago. I accidentally embarrassed her infront of her crush and her besties. Now she thinks that the whole school hates her because one of the kids told the whole school about what happened, and they have been making up a lot of 'names' and 'titles' for her. I told her I was sorry a billion of times, but she just tells me to go away.
I was assuming she would brush it off and the school would die down pretty quick, since it wasn't that big of a deal. But she is taking it really personally. I mean, REALLY personally.
So not less than nine days ago, literally 10 of my best Pokemon cards went missing. It included my Charizard and some of my good Tag Teams...so I asked my sister if she knew where they were. She said she had no idea where they could have gone.
I started to believe her, but then I found my Celebi and Venusaur Tag Team in her science book. It was one of the ones that went missing. So my theory is that she stole them. I haven't told my parents yet, I am afraid they won't believe me.
I had no idea how strong my sister was until three days ago.
I came in her room while she was reading a book and I asked her if she wanted to go to Kay's house with me. Kay is one of her friends, who was with us when I embarrassed Adalia. Adalia got off of her bed and threw her 400 page book at my face. I will admit, I didn't see it coming and she threw it hard. I still have a bruise.
I rubbed my face, and she started to yell and scream at me. She said that I ruined her whole life and that her crush even made fun of her on this app called PopJam. (A pretty good app, look it up)
She even said the f word to me.
My parents heard her yell and cuss, so they came upstairs. We talked for like 2 hours no joke it was terrible.
So she got grounded from using her Nintendo Switch for a month and I have to buy something super expensive for her to make up for it.
But I know she hates me. A swear word has never once came out of her mouth.
She is very rarely talking to me too.
PLEASE HELP! I don't know what to do 
