Stories like this are typical among African-Americans who have roots in the slave-era South and who have always spoken candidly about themselves and their relationships with slaveholding forebears. In some cases, the Negro second families carried the names of their masters/fathers into Emancipation and settled in the same areas.
This was inconvenient for the white progenitors and their families, who feared the taint of blackness so much that they often declined to acknowledge or speak to their darker relatives on the street. In nullifying these family connections, they embraced the fiction of racial purity that has dominated how white Americans see themselves for hundreds of years.