Literally, "Mi casa es su casa" or "Mi casa su casa" means "My house is your house." It's like "Welcome! Come on in! Take your shoes off and make yourself at home!"
My Home My home
I used to think it was Angela Summers, but after seeing the stills, I'm not so sure.
my house is your housemy house is your house = mi casa es su casa
My house is your house. My home is your home. I think the correct phrase is Mi Casa Es Su Casa.house