Wow, that was way too close for comfort.
Usually, she doesn't mind the people that don't know how to respect personal space, but this was way too much. Once, she learned that some cultures find the breaching of personal space to be offensive and disrespectful. For instance, if you stand too close to someone in China, they might not tell you up front that they are uncomfortable, but they will sort of shimmy in silence farther away. In Japan, they will respectfully distance themselves and quietly set themselves apart from you.
She is not an awkward person. She rarely, if ever, gets embarrassed in front of others or feels uncomfortable with people that surround her. This, however, was testing her patience greatly. It's one thing that you sit too close to her, but it's another that you almost sit her on top of you. It's fine that you poke her or jokingly nudge her shoulder, but it's not fine that you run your fingertips along her spine.
That's an entirely different story.
Those mere inches separating their faces sometimes are not what she would call a safe distance.
It's safe, sure, because it's absolutely normal, right? There's nothing going on between them, so, it's alright. Right? There shouldn't be a hint of discomfort between them because there's nothing to be uncomfortable about. Two normal people, just sitting there and talking like everything is normal and nothing strange is going on. There is no tension between them.