She is into black men and has been for a long time. She dated and still is seeing black men. The issue is, you keep denying to her that you want her to date black men. She is frequently throwing hints to you and you keep on refusing her offers. Tell her you love watching interracial porn and you would love to watch her with black man. However, I think it's too late for that, she can't trust you when you say it's ok and you are cool with that. I am sorry, some times our ego gets in the way and we can't admit the truth.