They REALLY need to add a step-parent relationship...
So I know they show up in the family tree. But ingame your stepparent is just a roommate living in the same house as you. There is no special relationship flag. And when the kids Age up they can da...
Yes, they really need to add in step-parents. It would also be cool if you could set step-parent, and other relationships (like aunt, uncle, etc.) in CAS!