Why is it your business if your brother has a girl friend?
I have my reasons. I know I am right.
Maybe the girl just lives in the apartment.
I think there is more to it than that.
Maybe she just shares in the rent and is not his girlfriend.
I do not believe that.
It is quite common today for people to just live together.
Is the girl pretty?
Yes, in fact she is very pretty. I would even say she is beautiful.