What was the climax of conflict for homer in lilies of the field?

Where the Lilies Bloom is a novel by Bill and Vera Cleaver. It is a story of a family who after the demise of their father hides his death from outside world to avoid being split up and sent to foster homes. The second eldest daughter in family Mary Call is made responsible by the dying father to care for the siblings and not let their land lord Kiser marry the eldest daughter. However, faced with ouster from the estate by Kiser's sister, Mary visits Kiser in hospital and offers to marry him if he lets the family stay. He again reiterates his resolve to marry her sister and Mary tells him that their father had died and she was looking after the family instead. He feels sorry for her and praises her bravery. She finally lets him marry her sister knowing he is a good man after all.