Keeping good ties with your mother is a religious obligation, which you should uphold. You have done well by your acting kindly towards her, if the money you are sending her is from your own money. However, if it is taken from your husband’s money, it is not permissible to send her anything, unless you husband agrees to it willingly. (Part No. 25; Page No. 155) May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.