This is easily the worst thing we can imagine happening to two people.
An engaged couple who dated for five years have been left in turmoil after their families met and they discovered they were brother and sister.
The woman, who is due to give birth next month, is devastated by the discovery that the father of her child is her brother.
The couple, who met at university, had decided they wanted to introduce their single parent families to each other before they got married.
But at the meeting it emerged they were brother and sister who had been separated as small children.
The unnamed South African couple are still in shock after making the discovery last Saturday.
The countryâ€™s Sowetan newspaper reported that the siblings had been raised separately after their mother and father went through an acrimonious divorce.
It reported: â€˜Their parents separated when the woman was eight months old and the man was two years old.
â€˜The manâ€™s father said he dumped his wife in 1983 because she was cheating on him. The girl was raised by her mother, while her brother was raised by his father.
â€˜Neither of them knew they had a sibling.â€™
This is an absolute nightmare. But hereâ€™s the thing: they dated for five years and they didnâ€™t have their parents meet? Or they didnâ€™t connect the dots when talking to mom and dad? This also goes to show you that you should stick through it in your relationship. You never knowâ€¦your kids may grow up to have incest babies together if you donâ€™t. Marinate on that.