As a big reader of Greek Mythology, I have many thoughts and opinions on this subject. If ever you feel like your family is incredibly disfunctional, read up on Greek Myths. The Greek Gods are the most disfunctional family of inbreds in history.
It starts off with the Titans. The Mother of all Titans and Grandmother of all Gods was Gaia, the earth, who was born from Chaos.
Without a mate, Gaia gave birth to Uranus, the sky. With him, she gave birth to twelve more kids known as the Titans.