Thank you so much for this. This was such an cogent and intelligent analysis to read. I'm crossing my fingers for Marian to return, hoping for events to have been a dream or hallucination. On one level I wish Guy could have been 'saved' by her, as cheesy/idealistic as that might sound.
But what you've said, the way you've explained it, renders their journey as complex and graduated and that at least is some consolation.