What is the optimal course of action regarding a sister who physically and psychologically assaults and abuses her, stalks her, and threatens her with death, which has affected her health and marital life, especially since the family does not intervene to stop her, and she feels intense fear of visiting her family's home because of this?

It is recommended to be patient and make supplications for the sister, to have some virtuous and influential people speak with her, and to search for a righteous husband for her. If the visitor fears harm to himself or his child, there is no sin upon him if he does not visit them, but he must maintain ties with them as much as possible, such as by calling. It is recommended to frequently remember Allah and seek forgiveness.