In some versions of Greek mythology, Zeus ate his wife Metis because it was known that their second child would be more powerful than him. After Metis's demise, their first child Athena was born when Hephaestus cleaved Zeus's head open and the goddess of war emerged, fully grown and armed.
Athena is "born" from Zeus's forehead as a result of him having swallowed her mother Metis, as he grasps the clothing of Eileithyia on the right; black-figured amphora, 550–525 BC, Louvre.
Athena began growing inside Zeus's head. When Haphaestus cut open Zeus's head, and Athena was born, she was not born an infant. Instead, Athena was born a fully grown warrior, dressed in armor and ready for war. This is how Athena became the goddess of war and wisdom.
Kratos asked Athena why she would sacrifice herself. Athena replied that Zeus must live so that Olympus could prevail. She also revealed that Kratos was the child of Zeus, who was compelled to destroy his father just as Zeus had done to Cronos.
Athena was infected by evils with greed, as she presumably became ambitious to rule over the world, and possibly became jealous of Zeus' authority over the Greek pantheon. She also allowed her ambition cloud her judgment, as she manipulated Kratos to kill the Olympians.
One of the reasons she became a virgin was to avoid having a fate similar to her mother, Metis. Even though she is a virgin goddess, Athena has demigod children, who are born from her own thoughts combined with the thoughts of mortal men she loves. These children are "gifts" to the men she favors.
Zeus fell in love with Io and seduced her. To try to keep Hera from noticing he covered the world with a thick blanket of clouds. This backfired, arousing Hera's suspicions. She came down from Mount Olympus and begain dispersing the clouds.
Perhaps partly because of the strange circumstances of her birth, Athena is often cited as Zeus's favourite child. He also greatly admired her strength of character and fighting spirit. Some believe Athena was Zeus's first born child, which might, somewhat unfairly, suggest why he chose her as his favourite.
Turns out Cronus had overthrown his dad, and he feared his son was a chip off the old block. One of those who sheltered the infant Zeus was a mountain nymph called Melissa. She cared for the baby and fed him milk and honey.
Athena receives the baby Erichthonius from the hands of Gaia. Erichthonios grew in the womb of Gaia and, when he was born, Gaia passed him over to Athena to care for him.
Athena swore on the day of her birth that she would never marry or have children. The people of Athens, however, believed a story that made their patron goddess an ancestor of their founding kings.
Zeus swallowed his consort METIS [mee'tis] (“wisdom”), after he had made her pregnant, because he feared that she would bear a son who would overthrow him. And so ATHENA [a-thee'na], or ATHENE (MINERVA), was born from the holy head of Zeus.
Impregnation by Zeus
Nonnus classifies Zeus's affair with Semele as one in a set of twelve, the other eleven women on whom he begot children being Io, Europa, Plouto, Danaë, Aigina, Antiope, Leda, Dia, Alcmene, Laodameia, the mother of Sarpedon, and Olympias.
Hermes realized what needed to be done and directed Hephaestus to take a wedge and split open Zeus's skull. Out of the skull sprang Athena, full grown and in a full set of armour. Due to her manor of birth she has dominion over all things of the intellect.
He was very afraid that one of his children would kill him just as he had murdered his own father. He was so worried he started to eat his own children after they were born, much to his wife Rhea's horror!
Zeus finally became enamored of the goddess who was to become his permanent wife — Hera. After courting her unsuccessfully he changed himself into a disheveled cuckoo. When Hera took pity on the bird and held it to her breast, Zeus resumed his true form and ravished her.
However, Athena does have her favorites in terms of heroes that she loves, the most important of whom was Odysseus. She also has an adopted son, whom she and Apollo protected, named Erichthonius.
Hera. The most famous of Zeus' wives, Hera was also the sister of the father of the gods, and the goddess of women, marriage, family, and childbirth.
Ganymede (or Ganymedes) was a young man from Troy. His beauty was unparalleled and for that reason, Zeus abducted and brought him to Olympus to serve as his cupbearer and lover. Ganymede's myth is an important step in the history of homosexuality.
II.
Aphrodite later and of her own volition had an affair with Zeus, but his jealous wife Hera laid her hands upon the belly of the goddess and cursed their offspring with malformity. Their child was the ugly god Priapos.
Under the name of Callithyia, Io was regarded as the first priestess of Hera, the wife of Zeus. Zeus fell in love with her and, to protect her from the wrath of Hera, changed her into a white heifer. Hera persuaded Zeus to give her the heifer and sent Argus Panoptes (“the All-Seeing”) to watch her.
First, she was born as a female. Second, Athena is also the goddess of weaving, and we sometimes will see an image of Athena holding a distaff.
When Athena saw that Arachne had not only insulted the gods but done so with a work far more beautiful than Athena's own, she was enraged. She ripped Arachne's work to shreds and hit her on the head three times.
Everyone was amazed at her work and one day, Arachne boosted that she had a greater talent than goddess Athena herself. This was an offense towards the gods, which was a very serious and even deadly sin for the ancient Greeks. That is why goddess Athena transformed her into a spider to wave for all her life long.