There is another thing, which is more frivolous, that I haven't understood how it was supposed to work, it's how to get an heir. From what I have seen it's VERY random, I've read that the way to do it is to have your spouse in your party for a while, and at some point, the wife will get pregnant, but that never happened for me, no idea why. I have seen that it happened to other people, and for others, it's the opposite, they get 20 children in 3 in game months. My guess is that there is still some WIP there to make it more consistent, but couldn't find any relatable info about how it works in depth.