From what I read, no one came near her after the stylist walked off. It's not unreasonable to assume that she thought she was coming back, had just stepped away momentarily, since no words were said, and gradually realised this wasn't the case. I also read that she tried to make eye contact, perhaps the fact that the hairdresser had walked off and no one would make eye contact fuelled her embarrassment and she didn't want to add to that by yelling across the salon? As you said before, we weren't there, so we can't know how she felt - we only have her words to go off, and who are we to tell her how she felt? I think the offer of a junior to do her hair seems like it may have been the final straw for her.
And for the last time, I did not say anyone's opinion was invalid if they didn't have children, just that it's not possible to tell a baby to wait for the blow dry.