to his/her/their house
Estaba convencida de que querría irse a su casa.
She was convinced that he would want to go home.
— Un asunto de familia (2018)
Hasta que se aburría de eso y se entraba a su casa.
Until he got bored of it and went inside his house.
— Dos hermanas (2003)
Ahora Mariana está yendo a su casa con la mamá de Susana.
Now Mariana is going home with Susana’s mother.
Todo lo que debemos hacer es ir a su casa.
All we have to do is go to his house.
— The Chaser (2008)