Natural Selection (2011)

Linda White Has Found Her Son. God Help Her.

When a dutiful, albeit barren Christian housewife discovers that her devout husband has suffered a stroke at a sperm bank where he's been secretly donating his seed for the past 25 years, she leaves her sheltered world and starts off on a journey to find his eldest biological son - a mullet-headed, foul-mouthed ex-con with whom she develops an odd but meaningful relationship.