in his/her house
Gracias, me gustaría quedarme en su casa.
Thank you, I’d like to stay at your house.
I ate at his house yesterday.
Vende sus pinturas en su casa.
They sell their paintings at their house.
— Sólo se vive una vez (2011)
El arma homicida fue encontrada en su casa.
The murder weapon was found in his house.
— No se lo digas a nadie (2006)
Ella no habla japonés en su casa.
She doesn't speak Japanese at home.
Ha dicho que no estabas en su casa ¡¡¿Qué?!!
They said you weren't at their house—what?!
— Do You Thing (2001)
Y él dejó a los dos hombres dormir en su casa.
And he let the two men sleep in his house.
Su marido la abandonó porque siempre encontraba fantasmas en su casa.
Her husband left her because he always found ghosts in his house.
— La dolce vita (1960)