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Affairs

After his marriage to Hera, different authors describe Zeus's numerous affairs with various mortal women. In many of these affairs, Zeus transforms himself into an animal, someone else, or some other form. According to a scholion on the Iliad (citing Hesiod and Bacchylides), when Europa is picking flowers with her female companions in a meadow in Phoenicia, Zeus transforms himself into a bull, lures her from the others, and then carries her across the sea to the island of Crete, where he resumes his usual form to sleep with her. In Euripides ' Helen, Zeus takes the form of a swan, and after being chased by an eagle, finds shelter in the lap of Leda, subsequently seducing her, while in Euripides' lost play Antiope, Zeus apparently took the form of a satyr to sleep with Antiope. Various authors speak of Zeus raping Callisto, one of the companions of Artemis, doing so in the form of Artemis herself according to Ovid (or, as mentioned by Apollodorus, in the form of Apollo), and Pherecydes relates that Zeus sleeps with Alcmene, the wife of Amphitryon, in the form of her own husband. Several accounts state that Zeus approached the Argive princess Danae in the form of a shower of gold, and according to Ovid he abducts Aegina in the form of a flame.

In accounts of Zeus's affairs, Hera is often depicted as a jealous wife, with there being various stories of her persecuting either the women with whom Zeus sleeps, or their children by him. Several authors relate that Zeus sleeps with Io, a priestess of Hera, who is subsequently turned into a cow, and suffers at Hera's hands: according to Apollodorus, Hera sends a gadfly to sting the cow, driving her all the way to Egypt, where she is finally transformed back into human form. In later accounts of Zeus's affair with Semele, a daughter of Cadmus and Harmonia, Hera tricks her into persuading Zeus to grant her any promise. Semele asks him to come to her as he comes to his own wife Hera, and when Zeus upholds this promise, she dies out of fright and is reduced to ashes. According to Callimachus, after Zeus sleeps with Callisto, Hera turns her into a bear, and instructs Artemis to shoot her. In addition, Zeus's son by Alcmene, the hero Heracles, is persecuted continuously throughout his mortal life by Hera, up until his apotheosis.

According to Diodorus Siculus, Alcmene, the mother of Heracles, was the very last mortal woman Zeus ever slept with; following the birth of Heracles, he ceased to beget humans altogether, and fathered no more children.