Lot's daughters were victims of a spineless incestuous coward of a father.
Genesis chapter 19:4-8
4 Before
they could lie down to sleep, the men of the city—the men of Sodʹom
from boy to old man, all of them—surrounded the house in one mob.
5 And
they kept calling out to Lot and saying to him: “Where are the men who
came in to you tonight? Bring them out to us so that we may have sex
with them.”+
6 Then Lot went out to them to the doorway, and he shut the door behind him.
7 He said: “Please, my brothers, do not act wickedly.
8 Please,
here I have two daughters who have never had sexual relations with a
man. Please, let me bring them out to you for you to do to them whatever
seems good to you. But do not do anything to these men, for they have
come under the shelter* of my roof.”
Genesis chapter 19:36-38
36 So both daughters of Lot became pregnant by their father.
37 The firstborn gave birth to a son and named him Moʹab.+ He is the father of the Moʹab·ites of today.+
38 The younger also gave birth to a son, and she named him Ben-amʹmi. He is the father of the Amʹmon·ites+ of today.