Name changed but regular poster
Recently had a gender reveal, organised by my SIL, at their house.
Only my in-laws were there, (I had a separate reveal with my family)
Not such a fan of gender reveals etc and never had them for my previous DCs but we like a family get together and SIL said she would love to host.
Anyway, MIL arrived, stayed for around 15 mins after we all said hi etc, then got into a little heated discussion with her own daughter about something unrelated (not with my SIL who was hosting but another SIL), she then left, before we did the reveal, literally just stormed out and drove home!
She didn't even do a follow up call to say congratulations on the sex of the baby or acknowledge anything. My DH was quite upset that his mum did that, I've not gotten over it, but he has but I've and not spoken to her since. AIBU?
Just need some thoughts about it really