If the girl is "acting black", how is the guy acting? If he is ghetto would he not approve of his girl acting ghetto? This may be a problem for your scene. Unless, of course, he is "acting white" then his outrage would be understandable, but maybe she would get pissed at him for using "white" words like, NASCAR, ask instead of axe or his constant demands to use a condom so she doesn't get pregnant. Consider this.