"Ultimately the bond of all companionship, whether in marriage or in friendship, is conversation." - Oscar Wilde
They will never speak paragraphs of feelings and emotions with each other, but these conversations that they have now begun to indulge in will be what allows them to open up to each other just enough, without even realizing it. In the end though, connections are made with the heart rather than the tongue, so I think their biggest, most profound "conversations" will be those where they hear each other's silences and decipher the quietness...for silence sometimes is more insightful than speech.
She has taken a step in the right direction here. She has begun to catch onto the subtle nuances of his gestures and behaviors, which is perhaps the most transformative change that this marriage has brought about in her. Earlier on she used to speak volumes upon volumes but she would still not be able to gauge the actual situation, whereas now she can read his body language and silence and intrinsically understand that something is amiss.
He is already attune to her silences, as he understands that when she is quiet, she is either disturbed about something or feeling emotional insecurity/upheaval. He needs to be concerned with filtering her words and understanding the hidden truth behind some of her everyday paragraphs.