How can this family regain family warmth in light of the father's neglect and dereliction of duty towards his wife and children, and his preference for his mother and sister?

The husband should be reminded of the divine commandment to treat his family well, inquire about their conditions, care for his children, and fulfill his duties towards them, such as providing for them. The children are advised to be patient with him and to exert every effort to reform him. They are not permitted to mistreat him or compromise their religion because of him. If this behavior is uncharacteristic of him, he should be treated with legal ruqyah.