sister-in-law
Estás haciendo una montaña de un grano de arena, cuñada.
You're making a mountain out of a molehill, sister-in-law.
— Devdas (2002)
Ella era la cuñada de la prima de mi mamá o algo así.
She was my mom’s cousin’s sister-in-law or something like that.
— El Infierno (2010)