Is she sinful who lives with her husband and fulfills her marital duties without making him feel her hatred for him, while intending to leave him after her children grow up, due to her lack of any other source of income?

Your hatred for your husband in your heart does not entail sin, but beware of neglecting any of his rights. You may be rewarded for your patience with him for the sake of raising your children. We advise you to supplicate for his guidance and to continue advising him in a kind manner, and to seek help from someone whose words you hope will influence him. A husband cursing and insulting his wife is a great evil. A woman may be permitted to seek a divorce due to clear harm, but one should not rush into that except after discerning what is in one's best interest.