What are the odds that when you say "literal reading" you actually mean your own contemporary reading of the word in English?
Was Lot Abraham's brother as a "literal reading" would make him?
SD
Scripture always clarifies a name when the person is a major player.
How did you know that Lot wasn't Abraham’s sibling brother?
Because scripture clarified it in Genesis 11:31 And Terah took Abram his son, and Lot the son of Haran his son's son, and Sarai his daughter in law, his son Abram's wife; and they went forth with them from Ur of the Chaldees, to go into the land of Canaan; and they came unto Haran, and dwelt there.
There is no doubt left what their relationship was.
However if you don't read Matthew and Mark literally, concerning Jesus brothers, you end up in lala-land, requiring endless speculations just to support some tradition you have no idea where it even started.
JH :(