That night they got their father drunk, and the elder daughter got in bed with him, but he was too drunk even to know she was there.
Let's get our father drunk! Then we can sleep with him and have children.”
The next day the elder daughter said to her sister, “I slept with my father last night. We'll get him drunk again tonight, so you can go to bed with him, and we can each have a child.”
It isn't clever to get drunk! Drinking makes a fool of you and leads to fights.