Ok, there is a regular playdate thing going on over the past 6 weeks on a Friday.
The 2 parents involved take turns to take the 2 children home for tea and a play every alternate Friday.
This has helped the 2 children settle in this term into a new year after many changes in the last 2 years and they are quite firm friends and both enjoy the playdates and look forward to them. Teachers are aware this is a regular thing (as do the other parents in the class).
This week child A announced to child B that they couldn't come over on Friday as they had been invited to another child in the class house and left child B a bit upset but they will totally shrug it off soon enough.
So, as the 3rd childs mother knew this was a regular playdate between the other 2 children, is she out of order? or is child A's mother out of order for not letting the other mum know this regular thing is over for the moment and breaking her week to have the other child.. I won't say which one I am yet as I would like to get a perspective from other parents...