First of all any, reference to Eve must depend upon Biblical exposition; that is, Adam and her were created on the 6th day. As the only two people in the then-world and with immediate responsibilities, we can safely presume God created them as adults, perfect adults. For instance, as a 25 yo adult she might have been only five minutes old.
If Eve was created from Adam's rib, that would mean that they were related and Cain and Abel were products of incest.
not only that, which means we're all cloned from clones. but also the fact that neither adam nor eve had belly buttons. the rest of us do.
And who did Cain and Abel marry?
And Enoch the 3rd son, after one had already been killed built a city before he had any kids....where did all the people come from to populate this "city".
Cain is the 1st child mentioned and probably the majority of Christians will say that he was the 1st born but the Bible doesn't say that. There could have been any number preceding him. There was no prohibition on marrying children or siblings so there could have been quite a few people before Cain was born. In fact, when God expelled him, his concern was that those 'other people' would kill him. There were apparently quite a few by that time.
Read the story in context.
3:24 So he drove out the man; and he placed at the east of the garden of Eden Cherubims, and a flaming sword which turned every way, to keep the way of the tree of life.
4:1 And Adam knew Eve his wife; and she conceived, and bare Cain, and said, I have gotten a man from the LORD.
4:2 And she again bare his brother Abel. And Abel was a keeper of sheep, but Cain was a tiller of the ground.
The story goes straight from being driven from the garden to the birth of Cain, with no mention of intervention centuries of births and the construction of cities etc. Your reading doesn't pass the "sophomore test", i.e. composition and narration skills at least equal to that expected in a sophomore English class. Stretch and twist in the spirit of Ruth Bader Ginsburg as much as you like, but you hypothesis does not pass a plain reading of the text.
