She's become accustomed to his detachment. She looks for other ways to prove whether or not he thinks about her even when he's promised he wouldn't. Of course, she has done the same, but the fixation apparently stands in concrete. At least for her. She may not even be the subject of his hallucinations or the accusations.

But it could all be a sign of how delusional she has become over the last past two years. Once satisfied with everything remaining the same, she now looks for them to change. There must be a reason stemming from some sort of discontentment with how the trees are securing the lawn, with the red bird no longer making an appearance, with the air smelling the same.