Shouldn’t I have told that woman her behaviour was wrong?

(A question from a young sister)

I had gone shopping with my sister-in-law. A woman came out of the changing room without her headscarf, stood in front of the men and women there, showed her outfit to her companions, and asked them what they thought. I went over and said, “Ma’am, what are you doing? The men are looking. It’s sinful. Fear God and go back into the changing room.” She was very upset and snapped at me, “It’s none of your business, child. Don’t tell me what to do.” I told her, “Actually, it is my business.” The saleswoman said, “Young lady, are you looking for trouble? Just leave it.” Teacher, shouldn’t I have told that woman her behaviour was wrong?