Ixion offed his father-in-law, which Zeus forgave. Then Ixion tried to seduce Zeus's wife, Hera. Mustn't do that. Zeus whipped up a fake Hera out of a cloud. Ixion bonked her. Zeus tied Ixion to an eternally spinning and burning wheel. Meanwhile, back on earth, the cloud gave birth to the deformed outcast, Centaurus, first in a long line of drunken and debauched centaurs.