A developer's decision on any given aspect of a game may not meet to your tastes. Apparently, the family system in ATTILA is something this author found lacking. So here we have "Better Family System", which makes some important changes to the vanilla system. This mod increases the chance for male children, decreases the chance for illegitimate children and more. Give it a whirl and see if you agree with the author's changes to the game.
Credits: General Julius Conan