DD went on a sleepover last night, there were four 10 year olds plus an older sibling (I think age 12) and her friend. i have known this mum for a while and trusted her but apparently she popped out 3 times during the evening, for 10 minutes or so each time, leaving the 6 children alone in the house. I wouldn't object to leaving my own DD for a few minutes but AIBU to think it's off that she assumed it would be ok to leave these kids on their own, even for a short while. Obviously nothing bad happened (that I know of). I don't think I'll be letting DD stay there again but should I tell the other parents? Should I say something to the mum or am I overreacting?