God Hephaestus, being the most determined of the gods, received Aphrodite's hand from Zeus to prevent the other gods from fighting over it. Aphrodite, however, did not accept the idea of the arranged marriage with the ugly Hephaestus, started a loving relationship with Ares, god of war. Hephaestus learned of Aphrodite's betrayal through Helium, the all-seeing Sun, and planned a trap for them during one of their escapades. While Aphrodite and Ares were in bed together, Hephaestus wrapped them in an unbreakable chainmail net, so thin it was practically invisible, and took them to Mount Olympus to humiliate them before the other gods.
The latter, however, only laughed at the sight of the naked lovers, and Poseidon managed to persuade Hephaestus to release him in exchange for a guarantee that Ares would pay a fine for adultery. In the Odyssey Hephaestus states that he would return Aphrodite to his father and demand his dowry from him.
In the Iliad, Hephaestus' consort is a minor Aphrodite, Cáris ("the grace") or Aglaia ("the glorious"), the youngest of the Graces, as Hesiod calls it. Hephaestus was the father of several children, both mortal and immortal. One of these was the thief Perifetes. Together with Talia, Hephaestus was considered the father of the Palicos.
The Thebans believed that the union between Ares and Aphrodite would have resulted in Harmony, as beautiful as a second Aphrodite. There is, however, no account of any fruit of this union, unless Virgílio seriously stated that Eros would be his son. Later authors explain this statement by stating that the god of love would be Ares's son, but handed over to Hephaestus so that he could raise him as his own son.
Hephaestus was associated in some way with the pre-Greek archaic mysteries (originating from the Phrygians and Thracians) of the Cabiros, also known as Hephaistoi, "the men of Hephaestus" in Lemnos. One of the three Lemmian tribes was also called Hepestius, claiming direct descent from the god. Hephaestus had few epithets when compared to other gods; one of them was Hephaestus Etneus (Hephaestus Aetnaeus), because his workshop was supposed to be located under Mount Etna.