The older daughter, concerned about preserving the family
line, suggested to her sister that, because no men were
around, it was their duty to preserve the bloodline by
lying with their father.[v.31,32]
The daughters then got their father so drunk they were
able to have intercourse with him on two consecutive
nights, the older daughter having her way with him the
first night, followed by the younger on the following
night.[v.31-35] The text describes that Lot was so drunk
“he was not aware of it when she lay down or when she got
up.”[v.33,35]