Single Moms household/theories

If you open up Sandi's family tree, or River's family tree, you'll find they have no father. What is up with that?

Theories

 * I think that they were made in CAS so they only have mothers, no fathers. --Random Ranaun 22:28, 26 June 2009 (UTC)
 * to add a bit of mystery in the game :0 katie kolman xxx