He Did Not Notice

I fucked a bbc first time. My boyfriend say we can talk any white girl who fucked a black man. He says it's gross interracial sex.
I don't agree I just want to know can he really tell.
I took all 11 inches for 45 minutes on his desk he came in me three times I enjoyed it and agreed to let him keep fucking. Now it's an experiment how long before he can tell lol.