Who noticed first?

When he noticed her, she noticed him noticing her. She had noticed him before, but he hadn't noticed her when she noticed him. Now that he noticed her and she noticed him she made sure he noticed that she noticed. She liked that it now seemed as if he had noticed her first and only then did she notice him. Actually, he had noticed her before too, before he decided it wouldn't matter if she noticed him noticing her; he had quietly observed her, as it turned out she had done too. All that was left was to acknowledge who noticed the other first, or to make the claim at least.

[Wanted to add more details to make it clear that this is about strangers and first moves, but I don't know how to do it without interrupting the flow and ruining the minimalism. Maybe I'll think of a way later. Posted on Instagram.]