his/her cousin
Tom restera chez sa cousine pour Noël.
Tom will be staying with his cousin for Christmas.
Tom a embrassé sa cousine.
Tom kissed his cousin.
Sa cousine, dont j'oublie le nom, était infirmière.
His cousin, whose name I forget, was a nurse.
His cousin is my wife.
Il s'entend bien avec sa cousine.
He gets along well with his cousin.
Sa cousine étudie en Allemagne.
His cousin is studying in Germany.
Avoir des enfants est toujours risqué, qu'on baise ou non avec sa cousine.
Having children is always risky, whether you have sex with your cousin or not.
— Le Loup de Wall Street (2013)
Si elle s'approche d'abord de sa cousine, elle sera ma femme.
If she approaches her cousin first, she will be my wife.
— Guerre et Paix (1968)