Should she spend on her parents who are poor without her husband’s approval?
Question

                My father is in need of financial help because his income is not enough to spend on himself and my mother. I work and my financial situation is very good, and I can afford to help my father. 

But my husband does not allow me to give them any financial help, on the grounds that I have brothers and they are responsible for spending on their parents and the daughters are not responsible. 

I have three brothers and their financial situation is o.k., but they cannot afford to spend on my parents. There are four of us daughters but I am the only one who works and can help my family. But my husband is strict in not letting me do that. What should I do? Should I obey my husband and listen to what he says? Or should I obey my family and help them even if that is without my husband’s knowledge? I hope that you can advise me. If the wife wants to spend on her family, does she have to ask her husband’s permission to do so?.
Praise be to Allah.
    The child – male or female – who can afford it has to spend 
    on his parents if they are poor and needy. 

    Allaah says (interpretation of the meaning): 

    “And your Lord has decreed that you worship none but Him. And 
    that you be dutiful to your parents”

    [al-Isra’ 17:23]

    Part of being dutiful is spending on them if they are in 
    need. 

    Ibn al-Mundhir (may Allaah have mercy on him) said: 

    The scholars are agreed that spending on parents who are poor 
    and have no income and no money is obligatory on the child. 

    The fact that you have brothers does not mean that you are 
    not obliged to spend on your parents, because your brothers cannot afford to 
    spend on them, as you mentioned. 

    See al-Mughni, 11/375-376. 

    Shaykh al-Islam Ibn Taymiyah said in al-Ikhtiyaaraat, 
    p. 487: 
The son who is well-off 
    (rich) has to spend on his father if he is not well off (poor), and on his 
    father’s wife, and on his younger brothers and sisters. 

    Based on this, what your husband says about this being the 
    responsibility of your brothers only, is not correct. 

    Since your spending on them is obligatory, it is not 
    permissible for you to obey your husband in this matter, because the Prophet 
     (peace and blessings of Allaah be upon him) said: “There is no 
    obedience if it involves disobedience to Allaah, rather obedience is only 
    with regard to that which is right and proper.” Narrated by al-Bukhaari, 4340; Muslim, 1840. 

    At the same time, you must also be gentle with your husband and try to convince him about that, and convince him that this is what Allaah has enjoined on you, namely the duty to honour your parents and treat them kindly. 
And Allaah knows best.