Hi,
It's a brand new game and a brand new household I started a few days ago (I have many other games/saves) and it was initially a wife/husband couple.
She became pregnant naturally, but then he tried cooking and accidentally died in a fire 😒
I've just tried again and the baby still doesn't appear in the household, my Sim is still alone after the birth, and the crib is empty and unclickable, BUT I can see one of the triplets and his dead father in the family tree.
So, he has some kind of existence. It is indeed created, but not as playable character in my household, just... some baby in my family tree.
About the "birthday message", it does appear the second after the birth, which is a little suspect.
Maybe I should just wait for a future patch before playing with this household again. I haven't played with it for hours, so I'm not invested in the story lol
I would just add, even if I don't believe it's even remotely related, that I also have a problem in this household with the Juice Fizzer that refuses do anything else than "Clean". It used to work fine and then, all of a sudden, it stopped working around the same time she became pregnant I think.
Thanks a lot!
V