A: If the situation is as you mentioned, you have committed a sin, as this is considered undutifulness to her. Since you knew that your mother will be hurt by these herbs and she asked you not to cook them, you are a sinner; you have committed a crime, you have been undutiful to your mother, and you must pay Diyah (blood money). This is considered quasi­ deliberate homicide. You have also to pay Kaffarah (expiation), which is emancipating a believing bondsman. If you cannot do this, you can observe Sawm (fast) for two consecutive months and perform Tawbah (repentance to Allah).