Little White Lie (2014)

Lacey Schwartz grew up in a typical upper-middle-class Jewish household in Woodstock, NY, with loving parents and a strong sense of her Jewish identity - despite the open questions from those around her about how a white girl could have such dark skin. She believes her family's explanation that her looks were inherited from her dark-skinned Sicilian grandfather. But when her parents abruptly split, her gut starts to tell her something different. At age of 18, she finally confronts her mother and learns the truth: her biological father was not the man who raised her, but a black man named Rodney with whom her mother had had an affair.

Source: TMDb