to his/her parents
John les escribe a sus padres una vez al mes.
John writes to his parents once a month.
Dejó a sus padres y se mudó al norte de Ucrania.
She left her parents and moved to northern Ukraine.
— El síndrome asténico (1989)
Ya hemos notificado a sus padres, así que, ¡adelante!
We've already notified their parents, so go ahead!
— Battle Royale (2000)
Él nunca deja de escribir a sus padres una vez al mes.
He never fails to write to his parents once a month.
Paul respeta a sus padres.
Paul respects his parents.
Obey your parents.
He/She doesn't obey his/her parents.
Pero si todos roban dinero a sus padres.
But everyone steals money from their parents.
— Los cuatrocientos golpes (1959)
Por favor, salude a sus padres.
Please say hello to your parents.
He doesn't listen to his parents.