I am not convinced that Ren didn't die from the surgery and the hospital and escape are just a fantasy that Cathy creates to cope with the loss. I know nothing narratively supports that - but I just can't fathom Ren surviving the surgery! The depth of cuts she would have to make to bind her legs would have to have caused massive blood loss. I'm so torn between wanting to go along with the story and being in so much disbelief at it happening that I just can't buy in