Will a woman be rewarded if she wears the hijab solely for her husband, without conviction or desire on her part?

Satan has subtle ways of coming between a person and obedience to Allah. If he fails to make you remove your hijab, he will whisper to you that your effort was in vain because you did not intend it for the sake of Allah, in order to hinder you from doing good and to cast doubt on your intention. It is obligatory to repel these thoughts, to proceed with good deeds, and to strive to correct one’s intention.