What if...

It has been a very long time since I have had this happen to me. Too long, perhaps. My first book, Kate's Task, is nearly finished, but has been that way for a while now. It is true that my schedule is often crowded, but another reason has simply been a realization: How does this glorify God? After all, we should bring glory to Him in everything we do, right? I truly believe that. And my book isn't perverted or anything like that, but much of it was written before God had become my ultimate priority. So as a consequence, it has sat in my hard drive, still waiting for me. I do plan to finish it, but something else has caught my attention.
What if...? It is always powerful when a fiction writer sits back and thinks about it. After all, people have probably thought of it before, but has anyone truly taken the step? My most recent 'what if' might take me into dangerous grounds and I would most definitely appreciate your thoughts in comment form. So here it goes...What if Adam and Eve had had a baby boy and girl before eating from the tree that brought sin into the world?
And the answers and ramifications to those questions kept coming to me. Well, we would have a perfect and sinless lineage, wouldn't we? Most of the world would live in sin, but there would be many, perfect people still living in the world today. Then the main question here hit me: Would Jesus still have died on the cross for everyone else's sins? And my answer to that was yes.
There are issues. I do not want to write anything heretical, which would exclude any sort of words from God in this alternate world. But the main message would be what I have said: God is love. He gives everyone a chance. I have other ideas, since this definitely needs building up, but what do you think?