Rant - destructive behaviour

I love my sister. This is a rant because i’m so fed up. I know i’m going to get over this (I always do) but my sister (19f) is autistic and non verbal, she has a very destructive pattern which this seems to come out of nowhere and I have no one that can relate to it. It’s so silly but I (21f) bought some toothpaste that I was really excited to use, it’s teeth whitening and was about 8 bucks. I have only used it about 3 times and my sister comes into the bathroom while i’m brushing my teeth and grabs my toothpaste and dumps it out everywhere for no reason and then rips up the container.

She does this with so many of my things and products that I just know not to get attached to things.I just mentioned Toothpaste but she has done way worse with way expensive things! We can’t leave anything in the bathroom. I just wanted to rant Thank you for listening