The main character is a housewife. There are also other characters like her husband who play important roles in the story. The husbands in the story are part of the mystery as they seem to be involved in the secrets that the housewife starts to suspect.
The 'Don't Worry Darling' original story is set in a seemingly idyllic 1950s - inspired community. It follows a housewife who begins to suspect that there are some very dark secrets beneath the perfect facade of her life in this community. She starts to question the reality she's in and the strange behavior of the people around her.
Well, Don't Worry Darling doesn't have a clear basis in an established story. It might draw inspiration from various themes and concepts, but not from a single identifiable source.