mistress
C'était sa maîtresse et elle vous a aidée.
She was his mistress, and she helped you.
— Les Diaboliques (1955)
Quand il rentre, sa maîtresse pardon, sa femme.
When he comes home, his mistress—sorry, his wife.
— La dolce vita (1960)
Mon neveu, Nicolas Rouillard, m'a dit que sa maîtresse s'appelait Adèle.
My nephew, Nicolas Rouillard, told me that his teacher's name was Adèle.
— La Vie d'Adèle - Chapitres 1 et 2 (2013)
Elle aurait tué son mari volage et sa maîtresse avant de les dévorer.
She allegedly killed her philandering husband and his mistress before devouring them.
— Lady Vengeance (2005)
Il faudra donc que je devienne sa maîtresse.
So I will have to become his mistress.
— Lust, Caution (2007)
Il dépense sa fortune pour sa maîtresse et son fils.
He spends his fortune on his mistress and his son.
— Gangs of Wasseypur : 1ère partie (2012)
Benjamin Guggenheim et sa maîtresse, Mme Aubert.
Benjamin Guggenheim and his mistress, Mme Aubert.
— Titanic (1997)