The Stepdaughter and the Black Serpent
The Stepdaughter and the Black Serpent is a Turkish fairy tale collected by researcher Barbara K. Walker. The tale is part of the more general cycle of the Animal as Bridegroom, and is classified in the Aarne–Thompson–Uther Index as tale type ATU 433B, "King Lindworm", a type that deals with maidens disenchanting serpentine husbands.
Source: Wikipedia — The Stepdaughter and the Black Serpent (CC BY-SA 4.0)