The answer dates back to 1994.
In “in vitro fertilization”, eggs are removed from the mother and then are fertilized with the sperm of the father. After the fertilization is successful, the embryo is planted into the Mother’s Womb.IVF is nothing new for couples who struggle with infertility concerns, and the family was sure as it was where the mistake could have happened.
It was just the second guess of the family that the IVF they went, for more than two decades back, was the reason why the ancestry kit did not show any links between Joseph and Rebecca, and so to confirm this, the family went for a paternity test; to make sense of whatever was happening, within the household.