Ino
Ino was the daughter of Cadmus and Harmonia, and was the second wife of Athamus. She became jealous of her stepchildren and arranged to rid herself of them by a trick (see Golden Fleece). She also had two children of her own by Athamus, Learchus and Melicertes.
Ino was the sister of Semele and the aunt of the god Dionysus. After Semele's death, Ino nursed her young nephew, thus arousing the ire of Hera. Hera drove both Ino and Athamus mad, causing Athamus to kill Learchus, and Inoto cast Melicertes into a boiling cauldron. Ino then leaped into the sea with Melicertes' body clasped in her arms. Ino was transformed into the goddess Leucothea, and Melicertes became the god Palaemon; as divinities, they bring help to sailors who are beset by storms.