Hank admitted that he was a bad man. He wanted to force Liberty to grow disconnected from society with no source of income and become a faded woman in her early thirties.
Compared to many housewives who had suffered the same situation, Liberty was a very brave person. She decisively cut off her relationship with Hank.
She never compromised just because of her child.
Although divorce might be harmful to the child, it would be equally detrimental if they fought all day while remaining together