if a husband do sincere tauba to ALLAH and appologize to his wife for all his mistakes regarding matrimonial life i.e. sometime beated and use abuse language, after that is her kidness to reconcile and giving last chance to husband for childrens sake or still demanding for divorce. What is the islamic way she will take wheter forgiving him and start living together or take divorce. Husband promising that it wont be happen next time but her brother dont let her go and incouraging her for divorce. Husband refusing to give divorce and requesting for compromise.

All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger. We ask Allaah to exalt his mention as well as that of his family and all his companions.

There is no doubt that reconciliation between the married partners who were in dispute is good, as Allaah Says (what means): {And if a woman fears cruelty or desertion on her husband's part, there is no sin on them both if they make terms of peace between themselves; and making peace is better.}[Quran 4:128]. Therefore, the wife should forgive her husband especially that he apologized to her. Forgiving is good in general between the general Muslims, and it is even more confirmed between the married partners as they are joined by a serious covenant which they should abide by. Allaah Says (what means): {…and let them pardon and overlook. Would you not like that Allaah should forgive you? And Allaah is Oft-Forgiving, Most Merciful.}[Quran 24:22].

It is not permissible for the brother of the wife to encourage her to ask for divorce, especially if she is pleased with continuing the marital relationship with her husband.

Finally, it should be noted that the husband should treat his wife kindly, and be wise in solving the problems which may arise between them. Hastiness leads to regrets. For more benefit on the ruling of beating the wife, please refer to Fatwa 85402, and Fatwa 88304 on treating the wife honourably and not being unjust with her. 

Allaah Knows best.