My brother and his wife live with my parents.
Sil is pregnant and she practically hid from us for 9 months. Whenever myself or my dsis visited our parents, she would ensure she's not home. There is no back story, we've all always been civil with one another. Db told my mum not to tell my sister and I about the pregnancy, She of course told us as it's a ridiculous thing to keep a secret and he had no real reason as to why he didn't want us to know. We never said anything so he never knew that dm told us, also he would be very annoyed with dm if he knew she told us.
Fast forward to now the baby was born yesterday. My father sent a picture of the baby to me, just a picture, no explanation as to who that baby is.
6 hours after the baby was born db sent a group mssg just saying his daughter was born at X pm.
Am really annoyed at him, we were always so close growing up, he was a brilliant brother, then he got married and just changed. He became very different towards us after marriage. We allowed it and never brought it up. He was the first person I told when I was pregnant. So the fact that he didn't even want me to know he's having a baby makes me extremely sad.
Am happy for both of them. However I've ignored his group mssg, the way I see it is if your going to be all horrible forbidding our mother from telling us your news, you yourself aren't telling us and your wife hiding from us then no I don't want to know about your baby after it's born. Am going to my parents next week, I don't think I'll see the baby or the mother as most likely she will go to her mums after she comes out from hospital.
The most hurtful thing is everyone from our extended family Knew about the pregnancy and also knew the gender, it was very embarrassing to hear from relatives the gender and me being his own sister having no idea.
I don't know what my aibu is. Am just really sad and hurt.