Mi casa es su casa spoken language
The expression originates from Spanish, and it is a friendly and common saying to welcome people visiting one's house.
The saying means "make yourself at home".
A: "It's raining heavily outside. Would you mind if I stayed at your home tonight?" B: "Of course not. Mi casa es su casa."
Come in and join the party with us. Mi casa es su casa.
To tell someone the truth about something that they had not understood or received false information
I have to set my wife straight about what happened yesterday.