his/her grandmother
Tom passava molto tempo con sua nonna.
Tom spent a lot of time with his grandmother.
Vorrebbe tanto imparare a suonare il pianoforte come faceva sua nonna.
She would really like to learn to play the piano like her grandmother did.
Scusa, devo accompagnare Leo a casa di sua nonna.
Sorry, I have to take Leo to his grandmother's house.
— The Way He Looks (2014)
His/Her grandmother is in the countryside.
— Le buone stelle - Broker (2022)