Not the cousins fault. He just wanted to keep busy and probably didn't even think that the sound of the ball could be heard through the walls just like my grandma. The problem would have happened regardless. I was only concerned of the emotion that usually happens once every month. Maybe I should have left out the trigger. It wasn't his fault, and he wasn't doing anything to try and get someone angry at him. If I would have showed him that I was angry, he most likely would have stopped, but that would have gone against my grandma's wishes. I know my cousin well enough to know that he wasn't doing that.