Leviatha was the first and, in the opinions of many demons, best wife of Lucifer . She bore him a son, Thanatos , and the two of them were engaged in a lengthy marriage. It would seem, however, that Leviatha was much more comitted to the marriage, as Lucifer would ultimately cheat on her with uncountable females of many plains. Eventually, her jealousy became so extreme that lucifer decided to indefinately imprison her.