@Nevar
If you want to test this mod, and see all it have to offer (and dont mind little cheating) check my posts 223 and 225 in this tread. It`s about getting kids you want for specific wife.
As for regular play, NO cheating at all, every kid is already decided on start of game for each wife, same as items/units in shops, enemy units wandering around etc, with every new game all this is determined before you go out of training area. So if you marry some wife, game already knows your kids, only wait for you to kiss her and 10 battles later there it is, your little bundle of joy