For those who have issues with the son not looking mixed
Here are some examples in real life where one parent is AA and the other parent is caucasian American and their offspring look Caucasian:
Rashida Jones is the daughter of Peggy "Mod Squad and Twin Peaks" Lipton and music mogul Qunicy Jones.
Here is Rashida: http://www.imdb.com/name/nm0429069/
Here is mom (Peggy Lipton): http://www.imdb.com/name/nm0005152/
Here is dad (Qunicy Jones): http://www.imdb.com/name/nm0005065/
In addition:
Here is Maya Rudolph: http://www.imdb.com/name/nm0748973/
Here is mom (Minni Riperton): http://en.wikipedia.org/wiki/Minnie_Riperton
Here is dad (Richard Rudolph): http://www.discogs.com/artist/Richard+Rudolph?anv=Dick+Rudolph