She is 7% Puerto Rican. It is thought one of her distant relatives on that side of the family may have owned slaves.
The bottom line Tom is that it doesn't matter how much money you make as a minority in this country a substantial portion of Americans won't treat you as a "Real American".
My trip to Florida with baby was rather enlightening. We stayed at a higher end place as three nights was $1200 plus parking and wristbands. There were a lot of upper middle class African Americans there in addition to white people. What I found fascinating was the self-segregation.
I noticed when we would go down to the pool it typically wasn't very crowded as we would go early or other odd times. If Baby and I claimed chairs, within a few hours of sitting there we would be surrounded by other interracial couples and African American families. The purely white folks stayed away from this section which typically became roughly a 3rd of the pool area.
In all honesty it is primarily the white folks that give us dirty looks and talk under their breath when we are out together. I have heard N lover whispered in passing more than once when out with baby over the years.
But the black folks there were so accepting of us and it felt so welcoming. I felt grateful to be part of the club.