Not as bad as the two people in the UK that were married and took a blood test to see if they could have a healty baby, and it turned out that they were twins, and seperated at birth.
I dont think their relationship died quickly, but I am sure the court seperated their marriage.
But then on a brighter side, kind of the same thing, but not, there was an artical once about these two woman that have been friends their whole lives, and they were like sisters. One of them does some family research and finds out that they were in fact sisters.