The hard part is that we cannot see how you were presenting other than from a picture (e.g. height, way she carries herself, voice, etc.). When I saw the picture I thought two very different things. My first reaction was why is she wearing so much makeup for such casual clothes to do a quick shop type of thing. The second was she would pass very well and be attractive when she was dressing up to go out. So, maybe it was the mismatch? Other than that, I cannot see why they would be staring for negative reasons.