You realize you're asking the age of a being born before history and immortal. She isn't a vampire; they don't get more powerful with age or anything. The only reference we can really have is that she was "born" before he was (since he was the youngest).
Zeus was Hera's brother, husband, and king.
Hera was Zeus' wife.
Hera is Zeus's wife and 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.
Zeus is married to Hera. Hera is also Zeus's sister.
Hera was Zeus's wife, and also his older sister.
Heracles is the son of Zeus. Hera is the sister-wife of Zeus.
Hera is the sister and wife of Zeus.
Hera is the wife and sister of zeus
Zeus married Hera, his sister.
Hera
Hera .