The Act were it going to End

The ending of reading the in chapter 14. I have discovered that their could be many different possibilitites of phyllis and watler Act to ending of the film in the chapter. Escaping from it all to another place, marry Phyllis, or even suicide!  On pg 113 Walter says, "Ive been thinking about something else.  Phyllis smiled then, the sadest smile you ever saw.  "I thought of the five patients" she said.  "The three little kids, Mrs. Nirdlinger, and myself.  It didn't seem possible that anybody that could be as nice as her when she wanted to be, could have done those things."  Walter then asks her, "What were you thinking about?"  Then Phyllis says "We could be married, Walter."  Walter replies, "We could be.  And then what?  The notion of the story was uncertainty surrounds them, bringing almost a desperation to which way they should retreat.  Then it started, started it again.  There is nothing ahead of us, is there Walter?"  "No.  Nothing" says Walter.  I  feel sadness and sorry for this "incredible duos."  But you know want they say, what goes around, comes around, and that is exactly what happened to them.  Walter and Phyllis's relationship started, and then ended just as quickly, the same.  For two unforbidden lovers, found themselves going separate ways at the end. that how it happen in want i read in this chapter of Double Idenmitiy.