She shows her adornments before her husband’s brothers
Question

                My brother’s wife is shameless in front of my brothers. She appears wearing unsuitable clothes and she behaves inappropriately in front of them. She is impolite with us, her husband’s sisters, she treats us rudely. On the other hand she treats my brothers so softly and nicely, she allures them by her words and actions. This made one of my brothers criticize his wife a lot for every small thing, he turned her life into hell because of this woman.  

We tried to change her and teach her, but all efforts failed. We told our brother about what she does of bad actions behind his back and about how she treats us, as he spends most of his time working and he does not know anything about what she does.  

All relatives know that she is a bad woman. My brother beats her sometimes because of what she does, but he does not want to divorce her due to my mother’s insistence. What is the solution for this problem? How shall we treat her? Shall I care not about this evil I see? I thought of getting another righteous woman for my brother to marry. Please tell us what shall we do?.
Praise be to Allah.
    Firstly: 

    Allaah has enjoined the Muslims to be sincere to one another, 
    and He has enjoined the one who has been advised sincerely to respond to the 
    command of Allaah, may He be exalted, and to refrain from the evil actions 
    that he is committing. Hence you must advise: 

    1 – Your brother’s wife, and tell her to stop doing things 
    that Allaah has forbidden such as uncovering any part of her body in front 
    of her husband’s brothers, speaking softly to them and mistreating you. 

    2 – Your brother himself, and tell him to stop his wife from 
    mixing with non-mahram men and to stop her from mistreating his sisters. And 
    he should pay attention to the evils that she is causing in the family, such 
    as creating division between his brothers and their wives. 

    3 –Your parents should take a stance concerning the actions 
    of their son’s wife. 

    4 – The husband’s brothers should not sit with their 
    brother’s wife or listen to what she says; they should beware lest she 
    become a cause of division among the family, and division between them and 
    their wives. 

    Secondly: 

    She has to know and respect the sacred limits set by Allaah, 
    and her husband – likewise – must realize that his wife is part of his flock 
    that Islam enjoins him to take care of. He should realize that he will be 
    responsible on the Day of Resurrection for her and her actions. 

    Among the things that Islam has enjoined upon her are the 
    following: 

    1 – She should preserve her modesty and chastity, and lower 
    her gaze and avoid looking at that which Allaah has forbidden. 

    Allaah says (interpretation of the meaning): 

    “And tell the believing women to lower their gaze (from 
    looking at forbidden things), and protect their private parts (from illegal 
    sexual acts) and not to show off their adornment except only that which is 
    apparent (like both eyes for necessity to see the way, or outer palms of 
    hands or one eye or dress like veil, gloves, headcover, apron), and to draw 
    their veils all over Juyoobihinna (i.e. their bodies, faces, necks and 
    bosoms) and not to reveal their adornment except to their husbands, or their 
    fathers, or their husband’s fathers, or their sons, or their husband’s sons, 
    or their brothers or their brother’s sons, or their sister’s sons, or their 
    (Muslim) women (i.e. their sisters in Islam), or the (female) slaves whom 
    their right hands possess, or old male servants who lack vigour, or small 
    children who have no sense of feminine sex. And let them not stamp their 
    feet so as to reveal what they hide of their adornment. And all of you beg 
    Allaah to forgive you all, O believers, that you may be successful”

    [al-Noor 24:31]

    Shaykh al-Islam Ibn Taymiyah (may Allaah have mercy on him) 
    said: 

    Many scholars are of the view that it is not permissible for 
    a woman to look at non-mahram men with desire. 

    Majmoo’ al-Fataawa (15/396). 

    2 – She should observe complete hijab before non-mahram men, 
    and she should realize that her husband’s brothers are also non-mahrams. 
    Indeed, she should be more careful about her clothing, adornment and speech 
    before them than before others. The verse from Soorat al-Noor quoted above 
    makes it clear that it is not permissible for her to show her adornments in 
    front of them. 

    It was narrated from ‘Uqbah ibn ‘Aamir (may Allaah be pleased 
    with him) that the Messenger of Allaah  (peace and blessings of Allaah 
    be upon him) said: “Beware of entering upon women.” An Ansaari man said: O 
    Messenger of Allaah, what about the in-law? He said: “The in-law is death.”

    Narrated by al-Bukhaari (4934) and Muslim (2172). 

    See Imam al-Nawawi’s comment on this hadeeth in the answer to 
    question no. 12837. 

    3 – She should adhere to the Islamic rulings on speaking to 
    non-mahram men and on walking, so there should be no softness or allure in 
    her speech or actions. Allaah says (interpretation of the meaning): 

    “then be not soft in speech, lest he in whose heart is a 
    disease (of hypocrisy, or evil desire for adultery) should be moved with 
    desire, but speak in an honourable manner”

    [al-Ahzaab 33:32]. 

    4 – Avoiding wearing perfume that can be smelled by 
    non-mahrams. 

    It was narrated that Abu Moosa al-Ash’ari (may Allaah be 
    pleased with him) said: The Messenger of Allaah  (peace and blessings of 
    Allaah be upon him) said: “Any woman who puts on perfume and passes by 
    people so that they may smell her fragrance is a zaaniyah (adulteress).” 

    Narrated by al-Tirmidhi (2786), Abu Dawood (4173) and 
    al-Nasaa’i (5126; classed as hasan by al-Albaani in Saheeh Abi Dawood. 
     

    5 – Refraining from being alone with her husband’s brothers 
    and mixing with them.  

    It was narrated that Ibn ‘Abbaas (may Allaah be pleased with 
    him) said: I heard the Prophet  (peace and blessings of Allaah be upon 
    him) say: “No man should be alone with a woman unless she has a mahram with 
    her.” Narrated by al-Bukhaari (1763) and Muslim 91341). 

    Shaykh ‘Abd al-‘Azeez ibn Baaz (may Allaah have mercy on him) 
    said: 

    Is it permissible for a woman to sit with her husband’s 
    relatives if she is wearing Sunnah hijab? 

    He replied: 

    It is permissible for a woman to sit with her husband’s 
    brothers or her cousins and so on if she is wearing proper shar’i hijab, 
    which means covering the face and the rest of her body, because she is 
    ‘awrah and a fitnah, if the sitting mentioned does not involve anything 
    dubious. As for gatherings in which there is anything dubious, that is not 
    permissible. The same applies to sitting with them and listening to music or 
    entertainment and the like. 

    It is not permissible for her to be alone with any one of 
    them or with anyone else who is not a mahram for her, because the Prophet 
     (peace and blessings of Allaah be upon him) said: “No man should be 
    alone with a woman unless she has a mahram with her.” Saheeh – agreed upon. 
    And he  (peace and blessings of Allaah be upon him) said: “No man is 
    alone with a woman but the shaytaan is the third one present.” Narrated by 
    Imam Ahmad with a saheeh isnaad from the hadeeth of ‘Umar ibn al-Khattaab 
    (may Allaah be pleased with him). End quote. 

    Fataawa al-Mar’ah al-Muslimah 
    (1/422, 423). 

    The husband should heed these commands and prohibitions, and 
    he should realize that he is responsible for his wife, so he must advise her 
    and direct her to that which is good. Guiding her is preferable, in our 
    view, to letting her go or divorcing her. 

    The parents should also take a firm stance regarding this 
    issue. The mother should stand up for what is right, and not let her 
    emotions take precedence over sharee’ah and common sense. She should 
    understand that if her son’s wife carries on in this manner, this will 
    destroy her son’s family and the negative effects of that are obvious as 
    mentioned in the question.  

    The wife’s brothers should also fear Allaah with regard to 
    themselves and be content with the halaal things that Allaah has blessed 
    them with. They should advise their brother and guide him and his wife lest 
    their relationships with their own wives be spoiled. They should also lower 
    their gaze and avoid mixed gatherings. 

    We ask Allaah to set the affairs of all the Muslims 
    straight. 

    And Allaah knows best.