She must be losing her mental edge after all these years and was really rattled that she has whitey blood. She had a perfect opportunity presented to her to launch into a rant about how an oppressive white slave master had to have repeatedly raped her black ancestors, how that entitles her to millions of dollars from her blood relatives, etc. Even if that wasn't how it happened.
Poor baby...sucks to be getting old and having a white wrench thrown into you life long agenda.