Hera became extremely jealous and spent much of her time on Mount Olympus spying on Zeus and plotting revenge if she found out that Zeus spent time with another woman. She had a violent temper and went out of her way to punish the women and their children that Zeus fathered.
Her unloyalty lied in the fact that she wanted to rule over Zeus and devised a plan to do so. In order to overthrow Zeus, Hera decided that she would drug Zeus and make him fall asleep. Once asleep, the gods tied Zeus to his throne.
Hera took pity on the bird, holding it to her breast to keep it warm. Zeus then reverted to his normal form, and took advantage of Hera's surprise by raping her. Hera then married Zeus as a way to hide her shame. Hera's sacred animals are the cow and the peacock.
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. Hera then decided to marry him to cover her shame, and the two had a resplendent wedding worthy of the gods.
Unfortunately, Zeus constantly cheats on Hera and he has done it over a hundred times, but in the end Hera always forgives him. But that does not make her angry and mad. This anger then goes to his sons and daughters as she takes her anger out on the children he has with the other mortals and deities.
Sometime during her marriage, presumably in retaliation, Hera started an on and off affair with Hades that ended around the "80s." It is unknown if Zeus was ever aware of the affair.
To avenge her wounded pride, Hera sets about manipulating the events of the Trojan War. She argues with Zeus on behalf of the Greeks, she conspires to break the truce in order to create more opportunities for Trojans to die, and she seduces and drugs Zeus in order to meddle with the outcome of the war.
What happens to Zeus after Hera seduces him? He agrees to fight for the Achaeans.
The Relationship Between Zeus and Hera
The goddess Hera was initially uninterested in Zeus, so he turned himself into a cuckoo bird and seduced her. After falling in love, the godly couple had two key children. These were: Ares, the god of war.
Hera was understandably jealous of all of her husband's infidelities. The goddess had a violent temper, and Zeus roused her fury more than once with his incessant seductions.
Revenge on Zeus
Hera was a very jealous and vengeful wife. She wanted Zeus all to herself, but Zeus cheated on her constantly with other goddesses and with mortal women. Hera often took out her revenge on the women who Zeus loved and the children they had with Zeus.
Hera; raped by her brother (and later husband) Zeus. Io; pursued and eventually raped by Zeus, transformed into a heifer. Leda, raped by Zeus in the form of a swan. This resulted in the birth of Helen of Troy.
Despite Zeus' wandering eye, Hera remained fiercely loyal to him. While she may have had numerous opportunities to cheat on Zeus, she spent most of her time punishing the objects of his desires.
Io. 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.
Ixion abused his pardon by trying to seduce Zeus's wife, Hera. Zeus substituted for her a cloud, by which Ixion became the father of Centaurus, who fathered the Centaurs by the mares of Mount Pelion.
According to a Homeric Hymn, there are three goddesses whom Aphrodite “can't persuade or decieve”, i.e. who don't feel sexual desire and are perpetually virgins. They are Athena, Artemis and Hestia. So, we are sure that Zeus did never have affairs with any of those three.
Hera. Hera, as the goddess of marriage, was the only Greek god/goddess to remain faithful to her spouse, Zeus. It was because of this fact that she was would get so angry when he cheated on her. Hera wanted the same treatment that she gave Zeus, the same fidelity and faithfulness.
Before his marriage to Hera, Zeus consorted with a number of the female Titanes (and his sister Demeter). These liaisons are ordered by Hesiod as follows: (1) Metis; (2) Themis; (3) Eurynome; (4) Demeter; (5) Mnemosyne; (6) Leto.
Hera is the goddess of family. By divorcing Zeus she would be breaking her own family further apart, therefore creating rifts between her children and the other gods and demigods. By refusing to divorce zeus, she is setting an example: she is the queen of the gods, and he the King.
The Greek poet Hesiod related two principal legends concerning Prometheus. The first is that Zeus, the chief god, who had been tricked by Prometheus into accepting the bones and fat of sacrifice instead of the meat, hid fire from mortals. Prometheus, however, stole it and returned it to Earth once again.
Io was constantly avoiding his amorous attempts, until Zeus took the form of clouds, surrounded her and made love to her. Unfortunately, his jealous wife, Hera, learned about this relationship and turned Io into a white cow to punish her and stop them from getting involved.
Ganymede, a beautiful Trojan young man, was aducted by Zeus to serve as his personal cupbearer and lover on mount Olympus among the other gods.
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. Zeus thereupon sent the god Hermes, who lulled Argus to sleep and killed him.
Hera is on the side of the Achaeans, so she plans a Deception of Zeus where she seduces him, with help from Aphrodite, and tricks him into a deep sleep, with the help of Hypnos, so that the Gods could interfere without the fear of Zeus.
Hera hates Heracles because he is a living reminder of her husband's infidelity. Because of this she is cruel to him. She could bring about Herakles' death but instead she wants him to suffer. She sends Madness to drive Heracles to murder his wife and progeny.