If you think about it every human being on the planet is derived from insest.
If there were only two people on the earth to begin with and they only had two kids, then one of them died than either they had another kid and it was a girl and the brother had a kid with his sister or the mother had a kid with her kid. Either way the human race started with insest according to the bible.
If there were only two people on the earth to begin with and they only had two kids, then one of them died than either they had another kid and it was a girl and the brother had a kid with his sister or the mother had a kid with her kid. Either way the human race started with insest according to the bible.