This has been bugging me for a couple of weeks now.
My 13 year old daughter went to the cinema with a friend and then went back to hers for a sleepover (first time at this friends house).
The next morning I discovered that this girls parents had gone to a party and had left the girls from 8.30 to gone 12 on their own.
Nothing went wrong but AIBU in being so annoyed about this. DD hasn't wanted me to say anything about this as she doesn't want a lose this friend (new blossoming friendship).
The parents didn't mention they were going to be out. If they had I could have made an informed choice about whether to let her go or not.