Mother Rathe, Defiled Matriarch, is a Unique Wretched Mother found in the Decaying Crypt Level 2 in Act I of Diablo III. She spawns for The Family of Rathe event.
She is the mother of Little Jebby Rathe and Willa Rathe, and the wife of Father Rathe.
In combat, she has the Frozen affix, but cannot regurgigate Risen Dead. Killing her is required to put the family to rest.