How we cite our quotes: (Chapter.Paragraph)
Quote #4
There had been nothing between them, and yet they had come together, exchanging their nakedness repeatedly. Each time he had taken her, they had been two isolated beings, far apart as now. He was no more responsible than she. The child was like ice in her womb. For as she looked at the dead man, her mind, cold and detached, said clearly: "Who am I? What have I been doing? I have been fighting a husband who did not exist. HE existed all the time. What wrong have I done? What was that I have been living with?" (2.128)
In starkly unromantic terms, Elizabeth contemplates her married life with Walter. She appears to believe that death has shown her the true nature of their relationship, namely that they were two strangers who had sex and thought (mistakenly, in her view now) it was something more than that. You can probably understand why she'd find the thought upsetting, as until just a few minutes ago, she thought she knew her husband pretty well.
Quote #5
And now she saw, and turned silent in seeing. For she had been wrong. She had said he was something he was not; she had felt familiar with him. Whereas he was apart all the while, living as she never lived, feeling as she never felt. (2.128)
Now Elizabeth beats herself up for thinking that she knew more about Walter than she now believes she did, seeming to think that she did him some kind of disservice or violence in her mistake.
Quote #6
In fear and shame she looked at his naked body, that she had known falsely. And he was the father of her children. Her soul was torn from her body and stood apart. She looked at his naked body and was ashamed, as if she had denied it. After all, it was itself. (2.129)
Oddly, Walt's death seems to have caused Elizabeth to have an out-of-body experience; at this moment, she sees everything through the lens of a grief-induced distance. In her view from "above," she has done her late husband wrong by failing to recognize who he truly was, and she feels actively ashamed of her failure.