I think that Brun earns a hug today just for sheer adorableness. Actually not being the only person in any given space who
doesn't know what's actually going on in social terms is a huge moment and achievement for her. I've no doubt that she'll be going on about it to Renee for hours tonight!
Here's an interesting thing to focus on here: For Brun the thought that Elliott believed she and Clinton were making out apparently doesn't affect her at all; she focusses instead on him not reading the situation correctly. I'm guessing that this means that she doesn't find it such an unthinkable scenario although, her being her, someone will likely have to express that fact aloud for her to realise the path down which her subconscious is skipping.
Now jump to panel 3 and, you know, there is a lot of pain there. I wonder how often Brun has to handle someone essentially say to her: "Poor little autistic girl; you'd never get it. Sit in the corner and look at your clocks whilst 'normal' people deal with the important stuff"? It's to Clinton's credit that, when she points this out, he explains rather than brush her off. He achieves this even though, from his reaction, he doesn't want to address his own feelings on the issue of making out with Brun!

Tbh that "I thought you were making out " thing is such a trope I'm a bit surprised that she didn't recognize it at all. Though I've never been in that situation so I don't know for certain I would either.
Of all the cast, Brun is the one least likely to be
Genre Savvy, IMO.