his/her grandmother
Ella pasa tiempo con su abuela todos los domingos.
She spends time with her grandmother every Sunday.
A su abuela le gustaría hablar con usted y con la señorita Rachel.
Your grandmother would like to speak with you and Miss Rachel.
— Crazy Rich Asians (2018)
Mary le puso a su bebé el nombre de su abuela.
Mary named her baby after her grandmother.
Ella vive con su abuela, quien no me deja verla en días lluviosos.
She lives with her grandmother, who doesn't let me see her on rainy days.
— El tiempo contigo (2019)
Susana pasó las vacaciones de verano en casa de su abuela.
Susana spent her summer vacation at her grandmother’s house.