Susan Delilah Crumb (formerly Banks and Black) is a fictional character on NBC's daytime drama Days of Our Lives. She was played by Eileen Davidson from November 4, 1996 to April 8, 1998, and again in 2014. Susan is the mother of Elvis "EJ DiMera", and once acted as Kristen DiMera 's doppelganger. In November 2011, it was announced that Brynn Thayer would take over the role of Susan, since Davidson was committed to The Young and the Restless. Thayer made her appearance on December 7, 2011.