La Cousine Bette (1964)

Élisabeth Fischer, a farmer's daughter and cousin of Adeline Fischer, now Baroness Hulot d'Ervy, has been furiously jealous of the latter since their early childhood. After arriving in Paris as a passementerie worker, she set out to harm the Hulot d'Ervy family by any means necessary. She pushed the Baron into debauchery and tried to destroy the relationship between his niece Hortense Hulot and Wenceslas Steinbock. But her schemes bring her no satisfaction, and she dies of rage.