What is the right of my sorceress aunt, who is my husband's mother and my children's grandmother, over me, and what is my religious duty towards her as a sorceress, and how can I bring my husband back to his home and work in Egypt after he fled from it due to his mother's sorcery?

If it is confirmed that your aunt practiced sorcery, she has committed a grave sin among the major and destructive ones. She must be advised to repent and warned of Allah's punishment. To get rid of the effects of sorcery, one must resort to Allah through supplication, adhere to acts of obedience, maintain daily remembrances (adhkar), and recite the Quran, especially Surah (definition) Al-Baqarah and the two Mu'awwidhatayn. There is no harm in seeking ruqyah (definition) (exorcism) from righteous and good people. Your husband should do the same, and if possible, accompany him to the Muslim country he moved to.