What is the ruling concerning the relationship of the betrayed woman's brothers with her, and the relationship of the betrayed man's family with him, and does she have the right to see her children, and what is the ruling concerning her brother boycotting her out of fear for his sisters, and is he considered sinful for this boycott, and does this boycott extend to holidays?

If a woman engages in an illicit relationship with her husband's brother, and then seeks a divorce from her husband to marry him, they have committed a grave sin. Inciting a woman against her husband is one of the gravest forbidden acts. Some scholars have deemed a marriage invalid if it occurs after such incitement, but the majority opinion is that it is not invalid. If the marriage takes place without a guardian (wali), it is invalid according to the majority of scholars. They must offer sincere repentance by renewing their marriage contract. If they repent and show signs of rectitude, then boycotting them is not permissible, because repentance erases what came before it. However, if they do not repent, then boycotting them depends on the benefit it brings: if it helps them return to righteousness or if maintaining ties with them causes harm, then boycotting is preferable. Otherwise, maintaining ties with advice is preferable.