Is it permissible for a married woman who feels an attraction towards another man, despite her husband's kindness to her, to perform Istikhara regarding this matter, and what is the correct course of action in this situation?

Allah Almighty has made the inclination between men and women either a prohibited relationship, such as adultery, or a lawful one, such as marriage. Allah has blessed you with a stable marriage, so your duty is to thank Allah and preserve your family. It is not permissible for a woman to establish a relationship with a foreign man, and the prohibition is intensified if she is married. The Istikhara prayer is not valid for a prohibited matter, such as destroying a family and displacing children, for Istikhara is performed for a matter whose good or evil is not yet clear. The alleged positive outcome is from Satan and the embellishment of one's desires. You must cut off all paths of Satan, who seeks to ruin your home and scatter your family, and sincerely ask yourself about the fate of your children and the guarantee of the continuation of a relationship built upon haram (definition).