If you find yourself, telling yourself, that the jealousy problem is because she or he won't come around to your way of thinking, you are fooling yourself. Really, if others are in control of your life - you don't stand a chance. You are responsible for the actions you take with regards to your thoughts and feelings of jealously. You have within you all the abilities to repair or remove jealously. Just ask your sister for help, she will be glad to offer suggestions.
Communication is of course the route to quelling jealously.
Think about what stirs up that rage or feeling in you and ask yourself. You can change this now and in the future. Here is a little tip for men. If you love each wife for who she is and use God's female spirit,Wisdom, so you do not show favoritism - it goes a long way toward turning aside a woman's jealousy. Using wisdom helps the women love one another like sisters.