Are all groups on your world equal or can some groups not talk to others? If so, why and how did this come about? (You can see how that kind of situation leads to the Romeo and Juliet plot because at some point the ban on conversing, or indeed anything else (!), between specific groups is going to be challenged and broken by somebody. It is almost inevitable).
As for family, how are these made up in the world you've invented? Families come in all shapes and sizes after all and fiction does generally reflect that but how does it show up in your fiction?