Will God punish the questioner for her negative feelings toward her mother and brother due to the mother’s continuous favoritism of the brother over her daughters, her financial and moral support for him and his wife, and her neglect of her responsibilities toward the questioner and her other daughters, while the brother exploits his mother and does not care for her? And are these actions of the mother and brother permissible or forbidden?

The mother's preference for your brother, without a forbidden justification, and the obligation to be just among children. Your brother must not accept his mother's preference for him in gifts, and he must honor his mother and obey her in what is right. The mother is not obligated to spend on her married son or daughters. However, her spending on you until you marry or earn money is obligatory if you have no earnings or wealth, and your obtaining a qualification does not negate your right to financial support. The mother's right is great, and honoring her is not waived, no matter her condition. It is obligatory to advise the mother and brother gently and to pray for them.