A older sister returns home after she is deserted by her husband. She does not want to decide things or face life's many choices and surrenders that power to her younger brother. He discovers her sexuality and needs for affection.
Prior to the Civil War in America there existed slave owners that took their Mulato, Quadroon and Octagoon slave half-sisters as mistresses in New Orleans. The Quadroons Ball was a major social event. A tradition where the father took his half-sister as a mistress and his sons took her daughters sired by his father as their mistress and the grandson recieved the next generation of fine yellow girls as his prize.