John Lanchester said this quote

But the thing which had made him fall for her, fall properly, was the way she seemed so calm and so quiet and so sad. Surrounded by noisy bankers showing off, and their variously pushy or beady or anxious or competitive wives, she seemed to be from somewhere else; a place where people carried their own burdens; a grander and realer and more honourable place. Roger didn't know that Matya spent a lot of that evening thinking about home, but he could tell that she was thinking about something, and it was that other thing which, for him, did it.