Who were Cain and Abel's brides and children?

Answer 1

If you read the story, Cain and Abel are adults with their own lives. One ios a Shepherd and the other a farmer. Adam and Eve had lots of sex becuause it was God's will and command and it was considered by God to be a blessing. He told them to be fruitful and multiply. Therefore they had many sons and daughters and they probably by then also had children. So they married their own sisters or neices but remember the gene pool was pure with little variation by this time and there was no prohibition yet against incest which became bad because after sin entered the world over time the gene pool became increasingly corrupt and aberation would occur.

Now though there is a time when God prohibits it we are all still related. In fact scientists have recently discovered by studying Mitochondrial DNA that all humans alive on the planet at this time all came from the same HUMAN (not australopithicine) mother and are calling her "Mitochondrial Eve".

Answer 2

One thought:

Cain was married, undoubtedly to his sister, since, according to The Bible, there were no other people on earth at that time(Genesis 4:17)(Genesis 5:4)(Acts 17:26). Abel, however, apparently died before he had the chance to marry (Genesis 4:8) since nothing is said of his family or children.