Is his spending on his wife who is also a relative regarded as kindness towards her family?
Question

                I am married to the daughter of my maternal aunt. Is my spending on her regarded as charity and upholding ties of kinship, and is my kind treatment of her regarded as honouring my mother and my maternal aunt?.
Praise be to Allah.
    A 
    husband’s spending on his wife may be obligatory or it may be charity and 
    kindness. If his wife is also a relative such as the daughter of his 
    maternal aunt, then his kindness towards her is also regarded as kindness 
    towards her mother and to the husband’s mother too. 

    The 
    obligatory spending has to do with providing accommodation, food and 
    clothing, as Allah says (interpretation of the meaning): 

    “Lodge them (the divorced women) where you dwell, according to your means, 
    and do not harm them so as to straiten them”

    [al-Talaq 65:6] 

    “but 
    the father of the child shall bear the cost of the mother’s food and 
    clothing on a reasonable basis”

    [al-Baqarah 2:233] 

    The 
    Prophet  (peace and blessings of Allah be upon him) said in his khutbah 
    during the Farewell Pilgrimage: “Their (women’s) rights over you are that 
    you should provide for them and clothe them in a reasonable manner.” 

    A man 
    will be rewarded for his spending on his wife, as al-Bukhari (1295) and 
    Muslim (1628) narrated from Sa’d ibn Abi Waqqas that the Messenger of 
    Allah  (peace and blessings of Allah be upon him) said: “You will 
    never spend anything seeking thereby the Countenance of Allah, but you will 
    be rewarded for it, even (the morsel) that you put in your wife’s mouth.” 

    Al-Nawawi (may Allah have mercy on him) said in Sharh Muslim: This 
    shows that spending on one’s dependents brings reward, if he intends thereby 
    to seek the Countenance of Allah. End quote. 

    Al-Bukhari (55) and Muslim (1002) narrated from Abu Mas’ood al-Badri (may 
    Allah be pleased with him) that the Prophet  (peace and blessings of 
    Allah be upon him) said: “If a Muslim spends on his family, seeking reward 
    for that with Allah, then it will be an act of charity on his part.” 

    And 
    Muslim (994) narrated from Thawban, the freed slave of the Messenger of 
    Allah  (peace and blessings of Allah be upon him) that the Messenger 
    of Allah  (peace and blessings of Allah be upon him) said: “The best 
    dinar that a man spends is a dinar that he spends on his family, and a dinar 
    that a man spends on his mount (for jihad) for the sake of Allah, and a 
    dinar that he spends on his companions (in jihad) for the sake of Allah.” 

    Abu 
    Qilabah said: He started with the family. And Abu Qilabah said: What man 
    is greater in reward than a man who spends on young dependents and protects 
    them from resorting to haram deeds – or Allah benefits them through him – 
    and makes them independent of means. 

    Whatever a man spends on his wife and dependents, he will have a reward for 
    that with Allah, so long as he seeks reward for that, and intends to draw 
    closer to Allah by doing what is required of him, or by making them happy, 
    or by honouring his relatives and treating them kindly.  

    And 
    Allah knows best.