Mother stealing

I work for a Medical company and I make a good living, Alhamdulillah. I never wanted to discuss this with anybody but I have to. My mom has a really bad habit of stealing stuff from stores like grocery stores and marts. This makes me soo disgusted and embarassed. Whenever I take her to any store, she steals stuff. I make almost 7 to 8K Dollars a month which is suffient to live but she keeps stealing. I tried to tell her nicley not to do this as it is a big sin but she shouted and said not to misbehave with her. Please let me know the best way to let her know about this gunah.