I think I probably am being unreasonable, so have said nothing to the mother in question, but just to check...
My DD, age 7, was invited to a sleepover at another little girl's house. This was fixed about 2 weeks ahead. I know the family reasonably well and it is a single mother all female household. The little girl has bunk beds in her room.
I obviously assumed that she and my DD would be sharing the bunk beds. But apparently the friend spent the night sharing mum's bed in mum's room and the vacant bunk bed was occupied by the ex-partner, who I have never met or heard about and didn't know would be there.
Am I out of order to have felt unhappy about this when my DD mentioned it?