I'd be game for reading the Bible if answered our questions completely, but I'm going through a tough piece of life right now, and I need to work on getting my work ethic and creativity back. Plus our ways aren't evil, so there
I don't think it could be 'not considered' as incest, since it complies with the definition of incest. However, God could have allowed it for that one occassion, since all sex is a sin, but excusable if it is to have children (or so the Rev tells us), that would have been similar. There should be a footnote somewhere saying: "WARNING: do not attempt to reproduce the reproduction of Adam and Eve. Failure to comply with God's wishes can lead to inbreeding, social exclusion and eternal damnation." Just a thought.