I have an idea. Because i enjoy choosing parents and making stories about them and i REALLY REALLY enjoy having kids. How about if say a brother and sister kiss you get a box that says these two are family do you want to move ahead? As far as the marrige goes i like mochas idea. Also what if there is a box where you have the option to put in a last name or not and if you put in the last name of a man and the same for a woman only these two can breed they can't sneak around. Then if you don't want to care you simply don't put last names in.