DD moved school last year at the end of Y4, mainly because of on/off bullying. It all happened quite quickly (just before summer hols, found out about place at last minute) and I didn't have time to tell all the other parents personally.
I've kept in touch with quite a few of the mums and DD went to a whole class party for a child from the old school at the end of last year.
One of the mum's completely blanked me when I said hi. We were friendly and DD was fairly friendly with her DD, they'd had play dates and a sleepover. I was a bit confused but guessed she'd had a bad day.
I then saw her again last week and smiled at her, she completely blanked me again. I haven't been in a situation like this since I was at school myself and I feel really confused... DH says to just forget it but I want to know what I've done wrong. WIBU to call her and ask?