Genesis 5:4

"After Seth was born, Adam lived 800 years and had other sons and daughters."  Genesis 5:4

So if Adam's daughters were born after Seth, how old was Cain when he got his wife?  How many children did Adam and Eve have?  800 years is long time to be able to have more kids.  They could have raised a few and then when those were old enough to take care of themselves had a few more and that cycle could have repeated until Eve was too old to have more children.  If men and women lived so much longer then did menopause hit later too?