Little Farm(2006)

Overview:

The wages of sin. A foul-mouthed family of brother and sister, in their late teens or early 20s, and their father run a small farm. During one argument between the siblings, ostensibly about her choice of a man to marry, she hints that she knows why he has no woman in his life. Later that night, when dad's sleeping off heavy drinking, brother and sister open Pandora's box.