Actually, Hera is Zeus' both wife and sister but not his mother. Their mother was the Titan Rhea, their father was the Titan Kronos. Plus, in myths, there's kinda no such thing as DNA so it wasn't really gross for god/goddess to marry each other. I hope this answer helped.
Hera was Zeus's wife, and also his older sister.
Hera is the sister and wife of Zeus.
Heracles is the son of Zeus. Hera is the sister-wife of Zeus.
Hera was Zeus' wife. She did not swallow herself.
In Greek mythology, Hera is the immortal goddess of marriage. As the queen of the Olympians, she is the sister and wife of Zeus.
Hera was Zeus' wife.
Hera was Zeus's wife, and also his older sister.
Hera is the wife of Zeus and sister of Poseidon. Hera is also the sister of Hades. Zeus, Hera, Poseidon and Hades were all siblings.
Hera is Zeus's wife and sister
Zeus was Hera's brother, husband, and king.
Hera is the sister and wife of Zeus.
Hera is the wife and sister of zeus
Zeus' wife is Hera, his younger sister.
Heracles is the son of Zeus. Hera is the sister-wife of Zeus.
Hera, Queen of Olympus, the sister-wife of Zeus is the mother of Ares.
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Hera is also the aunt of Artemis, as Hera is both wife and sister to Zeus. The mother of Artemis is Leto who either did not marry Zeus (which may be a bias of a monogamous interpreter) or was a co-wife along with Hera.