there was no crime at all, it hadn't been invented, but it doesn't make incest morally right just because it wasn't a crime.
Seems to me your morals are dictated by the law and not laws dictated by morals.
If incest wasn't illegal then as far as you are concerned its fine.
There wasn't crime was we understand it today, but there was certainly the violation of God's commands.
My morality is grounded in the objective standards, character and nature of God.....not the subjectivity of people.
The interaction of the first people wasn't incestuous and was deemed righteous and appropriate by the ultimate authority in God. I can't approve or disapprove of an act like incest as it didn't exist in that time and context. Now, I disagree with engaging in incest once God decreed it an inappropriate act.
As I said, the act of incest was later deemed inappropriate by God as the generations expanded and flourished. The impact of sin had already spread in humanity and brought with it decay, disease and death. Allowing same generational lines to engage incestuously would result in genetic abnormalities....God knew this and commanded it to stop.