I’m due my 2nd baby any day now. With my son my husband was keeping everyone updated on WhatsApp but made the mistake of saying her next check is at midnight but midwife thinks baby will be here before then.
Baby wasn’t born until nearly 3am and with stitches etc we were pretty busy so he didn’t actually update them again until 4am.
My family were in bits - a way over the top reaction, they thought I was dead 
The situation is more complicated this time as my SIL is also pregnant and already overdue, she will be upset/fuming if I have my baby before she has hers.
My instinct is just to not tell them anything, they can’t worry if they don’t know and they could wake up to a baby photo instead of staying up all night worrying.
My dhs family will be looking after our son so no need for them to know.
I’m currently having strong period pains so think something could happen this evening!