I’ll refer to this topic as well, since it also discusses realistic family relationships:
I agree with @Carnel . It should be adjustable both ways. Maybe we want to start with a couple on a brink of divorce and see if they can come around or end up divorcing after all? This would make for great story telling and I agree that there should be some freedom in that.
Also, I think the “Family” and “Friendship” bond should have more differences. To me, it just seems like two stats with basically the same function. Of course you can see a family member as “just” a family member and get along okay and have a family member you also see as a best friend, but the game doesn’t really make a difference in this in my opinion. Both stats are either high or low for me. It isn’t really portrayed in a way that makes us need two different stats as of right now in my opinion.