Also what is the official Christian/Muslim/Jewish line on the incest?
A sin as far as I know.
When I asked as a child how it was possible for adam and eve's kids to have had kids with each other considering birth defects etc (I read alot) the islamic position was that it was allowed at the time with no ill health effects because it was necessary. When it no longer was, it was banned and the whole birth defects thing was introduced down the line.
Much like how noah lived for hundreds and hundreds of years, as did everyone of that time, but then allah changed us so that we lived shorter lives as a punishment.
Or that childbirth never used to be painful, but we women were too slutty since it didn't hurt us to have kids so he made it painful to put us off being sluts.
Allah apparantly never god his creation right, and then acted suprised when the devil refused to bow down to what was defective creature that would need constant tinkering.
It's a great fantasy story plot line.