The history of the gods in the Age of Legends tabletop role-playing game is that of each generation overthrowing the previous one. Zeus defeated his father, Cronus, who in turn killed his father Uranus. If the prophacies are to be belived, Athena will one day overthrow her father Zeus. This makes father-daughter relations a little tense at time.
Detailed in the campaign setting’s book is how Athena manages not to aggravate Zeus’ understandable paranoia and how the goddess defeated Poseidon to become patron of the city of Athens.