^My parents were very involved with the kids, but the three babies cried ALL night and the parents needed sleep too haha so I was hoping the butler and nanny could care for them a bit too. And two of three DID, one didn't, but then, you know, they died.
As for the dying in sleep I only assumed because she was in bed and then the grim reaper appeared and she got up and died, but it could have been from lack of food or whatever if she wasn't eating for whatever reason. Or old age, that one was super old. I just don't know, but she's the third to die so I'm done with butlers for now haha.
The 3 infants aged up now anyways so parents and teen and nanny will tag team potty training them as quick as possible and then things get so much easier haha! (We have two child aged sims in the household two and thanks to a mod we sometimes have foster kids there as well )