She had an argument with her husband and went to her family’s house for three months
Question

                I had an argument with my wife and she left the house and went to stay with her daughter, and she did not speak to me despite my many efforts. Then her parents came and took her with them, without referring to me or meeting me to talk about what happened or to try to bring about a reconciliation. Now it has been three months with no contact or asking about her children. What is the ruling – is she still my wife or is she considered to be divorced?.
Praise be to Allah.Firstly: 
It should be 
    noted that one of the main causes of problems between husbands and wives, 
    which may lead to very bad consequences, is the lack of knowledge on both 
    sides of the rights that each spouse has over the other. Islam came to 
    establish these rights and to make each spouse adhere to them, as Allaah 
    says (interpretation of the meaning): 
“And they 
    (women) have rights (over their husbands as regards living expenses) similar 
    (to those of their husbands) over them (as regards obedience and respect) to 
    what is reasonable, but men have a degree (of responsibility) over them”

    [al-Baqarah 2:228]
The rights 
    of each spouse are matched by duties that they owe to the other. This 
    achieves balance between them, which leads to stability in family life. Ibn 
    ‘Abbaas (may Allaah be pleased with him) said concerning this verse: This 
    means that women are entitled to kind and decent treatment from their 
    husbands, just as they are required to obey them in matters in which they 
    are enjoined to obey their husbands. Al-Qurtubi said: The verse includes all 
    marriage rights and duties. 
These duties 
    include overlooking insignificant matters and mistakes, especially words and 
    actions by which no harm was meant. According to the hadeeth of Anas (may 
    Allaah be pleased with him), the Prophet  (peace and blessings of Allaah 
    be upon him) said: “Every son of Adam is prone to error, and the best of 
    those who err are those who repent.” Narrated by al-Tirmidhi (2499); classed 
    as hasan by al-Albaani in Saheeh al-Tirmidhi. 
Both husband 
    and wife have to put up with one another, for everyone makes mistakes and 
    the one who deserves most tolerance is the one who is with you most of the 
    time. Neither party should respond in kind if the other is angry. If one 
    spouse sees the other being irritable, he should restrain his anger and not 
    respond directly to the irritation. Hence Abu’l-Darda’ (may Allaah be 
    pleased with him) said to his wife: “If you see me angry, try to calm me 
    down and if I see you angry I will try to calm you down, otherwise we cannot 
    live together.” The Imam of Ahl al-Sunnah, Imam Ahmad, (may Allaah have 
    mercy on him) married ‘Abaasah bint al-Mufaddal, the mother of his child 
    Saalih, and he used to say of her: “Umm Saalih stayed with me for twenty 
    years, and we never differed concerning anything.” 
One of the 
    greatest duties is that each spouse should advise the other to fear Allaah. 
    In a saheeh hadeeth it is narrated that Thawbaan said: “When the verse 
    ‘And those who hoard up gold and silver’ [al-Tawbah 9:34] was revealed, 
    we were with the Prophet  (peace and blessings of Allaah be upon him) on 
    one of his journeys, and some of his companions said: ‘There has been 
    revealed concerning gold and silver what has been revealed; if we knew what 
    kind of wealth is better we would seek it.’ He  (peace and blessings of 
    Allaah be upon him) said: ‘The best of it is a tongue that remembers Allaah, 
    a heart that is grateful and a believing wife who helps him in his faith.’” 
    Narrated by Ahmad (21358) and al-Tirmidhi (3094). It is also narrated in 
    Saheeh al-Jaami’ (5231). 
Moreover a 
    man should not hate his wife if he sees in her something that he dislikes, 
    because if he dislikes one characteristic in her, he will be pleased with 
    another, so the one will make up for the other. According to the hadeeth, 
    the Prophet  (peace and blessings of Allaah be upon him) said: “Let not 
    a believing man hate a believing woman; if he dislikes one characteristic in 
    her he will be pleased with another.” Narrated by Muslim (1469). 
One of the 
    greatest things that will help to create a good relationship between spouses 
    is a good attitude. Hence Islam attaches great importance to it. It was 
    narrated from Abu Hurayrah (may Allaah be pleased with him) that the Prophet 
     (peace and blessings of Allaah be upon him) said: “The most perfect of 
    the believers in faith are those who are best in attitude, and the best of 
    you are those who are best to their womenfolk.”  Narrated by al-Tirmidhi 
    (1162); classed as saheeh by al-Albaani in Saheeh al-Tirmidhi. 
Part of kind 
    treatment is forbearance, not following up on all matters, small or great, 
    and not rebuking or scolding for everything, except with regard to the 
    rights of Allaah. 
Secondly: 
The fact 
    that your wife left the house without your permission and has been away for 
    so long, does not mean that she is divorced, rather she is still your wife, 
    and she is not divorced unless you divorce her. 
But this 
    leaving is counted as nushooz (wilful defiance) and she is sinning thereby, 
    and she forfeits her right to maintenance, so long as she has no excuse for 
    leaving, such as any harm or wrongdoing that you may have done to her. But 
    her continuing to stay away from the home for this length of time, and her 
    keeping away from her husband and children, are a sin that cannot be 
    approved of, and her family should not help her in that. This staying away 
    is one of the greatest means that the Shaytaan will use to destroy the 
    household and create enmity. Hence a wise man, and a family that understands 
    the consequences, will not approve of this staying away, rather they will 
    strive to bring people together, discuss the matter and solve the problem in 
    an atmosphere of kindness and love, so as to preserve the respect and love 
    between the spouses. 
Hence our 
    advice to you is to get in touch with your wife, and admonish her and remind 
    her of Allaah and of her duties towards her husband and children. If this 
    advice does not succeed, then seek the help of good and righteous people 
    among her relatives and others whom you know. 
Our advice 
    to the wife is to fear Allaah and beware of disobeying her husband and 
    making him angry, and giving her family precedence over the interests of her 
    home and children. 
Both spouses 
    should realize that stubbornly clinging to their own opinions will not solve 
    the problem that exists between them, rather it will only make it worse. The 
    one who is big hearted is the one who hastens to reconcile, and understands 
    the importance of reconciliation. So be the big hearted one, and let that 
    motivate you to seek an understanding and a solution to the problem. That 
    will only raise you in status before Allaah, may He be exalted, and before 
    His creation. The Prophet  (peace and blessings of Allaah be upon him) 
    said: “Allaah only increases a person in status if he forgives, and no one 
    ever humbles himself before Allaah but Allaah will raise him in status.” 
    Narrated by Muslim (2588). 
So hasten to 
    get in touch and ask after her. Take the first step towards reconciliation 
    and bringing the family back together, and your reward will never be lost 
    with Allaah. 
We ask 
    Allaah to guide you both. 
And Allaah 
    knows best.