I work for a large organisation and so does a close friend of mine but she works for another department. We have been friends since we were children so this isn’t a work friendship.
Anyway my friend finished up on maternity leave a few weeks ago and had an elective c section last Wednesday.
She’d told us all weeks and weeks ago what date it was and I’d texted her on Wednesday morning to wish her luck.
On the Wednesday morning on the way into work I bumped into my friend’s boss who I know and we were chatting and my friend came up in the conversation. Her boss knows we’re friends and she’s a lovely woman. When she asked about her I said “oh she’s having her section today.”
Her boss must have texted her to wish her luck and today I got a rather sharp message from her stating that I should never have mentioned her section date to her boss and it was none of her business and I should have known to keep it quiet.
I’ve had two elective sections and it wasn’t a secret about the date
but Obviously if she’d told me to keep the date a secret I would have.
My DH thinks she is being unreasonable and quite nasty about it.
I messaged her back to apologise and I did say that at no point did she ask me to not tell anyone what date her section was booked.
She responded to say I should just have known 
Aibu to just tell her she’s being ridiculous or was I being unseasonable to not know that I was to keep it a secret?