Relationship expectations vs. scientific reality in one perfect frame! While she suspects romantic betrayal, his mind is grappling with the genuine physics paradox of Ant-Man's respiration. If Ant-Man shrinks below ~0.3 nanometers (the size of an oxygen molecule), he'd literally be unable to interact with air particles to breathe. Marvel conveniently skips this detail, but science nerds can't help but fixate on it at 3AM. The Pym particle might alter mass and density, but it doesn't explain how his lungs would function at quantum scale. This is the kind of burning question that keeps physicists awake while their partners assume much more mundane concerns!