stepdames

/ˈstɛpˌdeɪmz/
noun
  1. The plural of stepdame; an old-fashioned or literary term for stepmothers.
    • Historically, stepdames had a difficult role in blended families.
    • In fairy tales, stepdames are often portrayed as cruel and jealous.
    • The novel described the hardships faced by children with unkind stepdames.