Demeter was very protective of her daughter, keeping her naive ... to Olympus and ask Zeus for Persephone's hand in marriage. ... He gave his consent to the marriage.
As you may know, Zeus and Hades were brothers, and Hera was their sister. During that era, it was okay to marry your family members. Hera, who no doubt knew that Zeus had already had six different lovers, spurned his romantic overtures. However, Hades fell in love with Persephone in a heartbeat. That was because Aphrodite, the goddess of love, wanted to prove to her son, Eros, that she could make anyone fall in love.
