Honestly, it would have depended on my mood. If I was having a really bad day, or I was anxious, stressed, or maybe even just a little off, or depending on how your behavior came across, I could get really, really, really upset about this. Being told how to feel in a situation would, at the very least, annoy me. But if we were joking around, enjoying the day, I probably wouldn't have gotten upset.
I think the best thing you can do is talk to her about it.
Maybe she saw your post about Miss Grocer Girl