My 9 year old has been very close , even best friends, with another child at school. Outside of school child's mother avoids us and is icy cold with us. She is warm and friendly with three others arranging playdates, sleepovers, holidays with them. I've invited her child over a few times but messages completely ignored. Her kid has made it clear they'd love to play outside of school with mine.
She'll bend over backwards facilitating other friendships even though those children have problematic behaviour at times e.g. domineering, occasional threats in the games and disrupting lessons. So it's not that. My child is kind, no arguments and no complaints from school.
Mother slightly odd in some other ways too but who isn't.
AIBU to think this is exclusion or social bullying? How do I support my child as child doesnt understand why friend cant play outside of school? Do some people just like making little kids unhappy?