I had a dream my little sister died by being crushed in a bed.?

I was viewing everything from a first person pov except I wasn't actually anyone. My older brother(who does not live with us) was at our house. He was supposed to be watching my sister.My 5 year old sister was in a back room playing on a bed ( which happened to be one of those fold in half spring beds not a futon). All of a sudden it folded back together and she was being crushed and could not breathe so she suffocated. The worst part was my brother didn't find her until much later because he wasn't watching her like he was supposed to and the tv was up too loud.