[Heaven's Dark Angel]

My sister (3) just closed the door on her finger. Which was an automaticaly open door. When she shut it she put her finger there. She screamed open the door. I did , now it looks like there is a dent around her thumb. It's really small not too big., but a purple surrounding. My dad came rushing down cause he heard my sister cry. Well he yelled at me like it was all my fault. I was tired so I sat in the back of the car. When he yelled at me I couldn't handle it so i screamed in his face,'' WHY IS IT ALWAYS MY FAULT, I WAS JUST TIRED AND RESTING!,'' Next thing he drove to my mother's shop to inform what happened. I told my cousin about it and she believed me. Now my mom wouldn't believe that it wasn't my fault cause she wasn't there at that time. I hate being yelled at when it's not my fault and thats when tears come out of my eyes. I don't know what to do about my sister and how to make my mom belive in me more.
when I meant(3) That means 3 years old