I think the new family tree setup has caused glitches in prior family relationships. First, it does not seem like marriage until death do us part allows a sim to remarry when their spouse passes. One can only become a partner (I'm talking about changes made in CAS). Second I had partnered two sims and they had a child but didn't get around to marriage. Now the game lists them as sisters (half-sisters) and I cannot change this in CAS, even with testing cheats, edit mode on. I don't have any mods.
