Adam Clarke on Genesis 19:32

Come, let us make our father drink wine - On their flight from Zoar it is probable they had brought with them certain provisions to serve them for the time being, and the wine here mentioned among the rest.

After considering all that has been said to criminate both Lot and his daughters in this business, I cannot help thinking that the transaction itself will bear a more favorable construction than that which has been generally put on it. 1. It does not appear that it was through any base or sensual desires that the daughters of Lot wished to deceive their father. 2. They might have thought that it would have been criminal to have married into any other family, and they knew that their husbands elect, who were probably of the same kindred, had perished in the overthrow of Sodom. 3. They might have supposed that there was no other way left to preserve the family, and consequently that righteousness for which it had been remarkable, but the way which they now took.

4. They appear to have supposed that their father would not come into the measure, because he would have considered it as profane; yet, judging the measure to be expedient and necessary, they endeavored to sanctify the improper means used, by the goodness of the end at which they aimed; a doctrine which, though resorted to by many, should be reprobated by all. Acting on this bad principle they caused their father to drink wine. See note on Gen 19:38.