Her friend catches it first. Friends always see the setup.
They saw how she was standing before he walked in, and they see the half-turn after. The drink comes up too slowly. The voice drops. A smile gets pressed into the rim of the glass like she is trying to hide it from the table and failing by half an inch.
That is when the side-eye starts. One friend looks at another. Someone taps a nail against a phone case. No speech needed.
Later, the group chat will not remember his exact line. It will remember what she did right after it.