The Smokin' Gun: Why did Abraham marry his half-sister Sarai?
"10] 'What then,' Abimelech demanded of Abraham, 'was your purpose in doing this?' [The king was asking Abraham
why Abraham said that the very sexy Sarai* was his sister, but did not warn the king that she
was also his wife. It is here we are told a very relevant, oh-by-the-way, point.]
"11] 'I thought,' said Abraham, 'surely there is no fear of God in this place, and they will
kill me because of my wife. 12] And besides, she is in truth my sister, my father's daughter
though not my mother's, and she became my wife.'" [Genesis 20:10-12]
* Before her name was changed in the Bible, Sarah (Abraham's wife and half-sister) was called Sarai.