Here's the thing, George," she says. "Things haven't been right with us for a long time. You don't seem to appreciate me anymore."
"I appreciate you."
"You don't act like it."
At the time, he hadn't acted like it. For some reason, he'd fallen into a pattern of ignoring her, of taking her for granted, without even realizing he was doing it. This was the conversation when she had called him out.