Agree with all of the above. Two items of explanation that is implied, but not explicitly 'explained' in the above.
1) male children inherit the attributes of the father. female children inherit the attributes of the mother. (Their genetics operate differently than they do on Terra.)
2) When you marry off a daughter, she always goes to her husbands faction, and becomes a totally loyal member of it. When you marry off a son, he remains yours, AND his wife joins your faction and becomes totally loyal.
By 'loyal', I mean YOU can give her orders, and she obeys. (also unlike life on Terra!) Hope this helps.