I love how most of us don't expect this to end well.
I was on edge the entire time and when the end came I was relieved to Marly and Wendy still together.
Same here.
The setting was eerie and oppressive, I felt a kind of dread hanging over me while I was reading. I didn't expect a happy ending at all.
If there is a chance of a sequel I would hope we get to see what kind of letter Marly would write. I also secretly hope to see a letter from Wendy addressed to her mother, wouldn't that be a great read?