24 years ago a white mom and white dad had a black baby girl.
The mother insisted she never cheated, the father believed. The girl was told her entire life she was 100% white even though she was clearly black.
Before her dad died she told him she thought he might not be her father. He said that was not true, he was definitely her biological father, and her darker skin just happens sometimes. But dad agreed to a DNA swab.
After he died the results came back... inconclusive.
So she did another test with her mom's DNA included. The results came back... he wasn't her father.
She confronted her mother. Her mother said hm, now that you mention this, you know, I might have fucked a random black guy in the pub bathroom 9 months before you were born, never occurred to me before now that that would have anything to do with your kinky hair and black skin. I honestly thought your father was your father. Oops, sorry.