All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger. We ask Allaah to exalt his mention as well as that of his family and all his companions.
Indeed you did well by being kind and dutiful to your mother and avoiding anything which may anger her, and by keeping a good marital relationship with your husband. There is no doubt that the status of the mother is great, and her children are obliged to be kind and dutiful to her, but this obedience is only in matters that are Islamically permissible. However, her order to you to be tough with your husband and not help him financially when he is in need, and the like, is not among what is permissible. Indeed, the scholars stated that children are not obliged to obey their parents in things that are of no benefit to them [the parents] and causes harm or difficulty to the children.
For more benefit, please refer to Fataawa 86982 and 83443.
Therefore, we advise you to be wise by keeping a good marital relationship with your husband and not severe ties of kinship with your mother, but first and foremost, you should seek the help of Allaah in doing so.
Finally, it should be noted that you should solve any problems that may arise with your husband in privacy and you should not inform your mother or anyone else about them unless it is a necessity. In such a case, you should seek the help of people who may solve the problem between you and your husband and avoid seeking the help of people who may worsen the situation. You should also advise your husband with good words and in a good manner if he is neglectful about his obligations towards you.
Allaah Knows best.