Last night my brothers (8 and 6 years old, I am a 15 y/o) were playing simon says, they had asked for me to be simon and I said sure. I was sitting in their gaming chairs in their room, a basketball sized rubber ball in my lap and holding a cup of sparkling red grape juice, which I was drinking while they did the stuff I told them to do (read: I wasn't just holding it.).

&amp;#x200B;

My 8 year old brother decided it would be funny to kick the ball in my lap, at that same moment I was raising the cup to take a drink from it. When he kicked the ball, it flew up and hit the cup, making me spill sparkling grape juice all over myself and getting it on the carpet. I was sticky and pissed because, not only was i soaked, they'd gotten grape juice all over their cream colored carpet and it was going to stain if we didn't clean it up.

&amp;#x200B;

I stormed downstairs (not before yelling "This is why I can't have fun with you," they always seem to take things just too far) to tell my mom and changed into dry clothes before going into my brothers room, where they had moved the chairs so my mom could use the carpet cleaner, and said, "This is why you don't kick people when they're holding drinks, especially not grape juice. That stuff stains, (brother name)." I'll admit, I kinda yelled it. I get explosively/violently angry and I was *angry*. 

&amp;#x200B;

Eventually he apologized after I showered to get un-sticky, but when they went to bed my mom pulled me aside and told me off for what I'd said to him and for getting mad at him, she thinks it's just over the grape juice but I'm more angry over the fact that he actually kicked me and thought it was going to end well. She told me that it was my fault for getting grape juice everywhere and that I shouldn't have been holding the cup, even though I was actively drinking from it while playing.

&amp;#x200B;

Nothing of mine was stained, I was wearing black, and none of the carpet was stained either. I was just angry. AITA?