my sibling sucks

She ripped my precious paper that took me weeks to finish and she ruined it. I have a valued jewel and my so called sister lost it. Shes also smaller than me. Younger. She slapped me. What is wrong with her? I m mean, just say you got a hundred dollar bill and your sibling ripped it in half. What would you feel? Angry. That’s what I feel now. I still wonder what the h*** is wrong with her.