She left home fleeing her husband’s beatings

What is the Islamic ruling in your view on a woman who reaches the age of sixty five, and from the time she married her husband at age 14 she has been suffering from her husband’s bad treatment, his beatings, his humiliating her in front of her children and in front of others, and always throwing her out of the house, yet despite that she has been patient and seeking reward from Allaah, responding to all his never-ending demands even though she suffers from heart disease and blood pressure, and the doctors have advised complete rest for her and that she should not exert herself? Recently this husband’s bad treatment of this woman has become even worse; he humiliated her in front of her guests, beat her and threw her out of the house, so she had no choice but to leave the house to him and go and stay with her children, knowing that he would not give her enough money. What is your view on this case? Now she does not want to go back to him and he does not want her and he does not acknowledge that he has wronged her… Is she guilty of anything if she does not go back to him if he asks her to? What is your advice to them? May Allaah reward you with good.