I have decided to stop speculating about Dupree's sexual orientation, I'll just sit back and enjoy the story. What I really like to see is some sort of ceremony to confirm the 'marriage' of Ennis and Ellery in front of their closest friends (Wes and Edna being the parent figures).
This is what Louise said some time back about that yb.
QUOTE:
And for those of you wondering if the Saga is going to end... I am presently seriously considering a Book VI, which I am going to title "The Red Stallion", which will take place after the boys' vacation and revolve around life at the Red Stallion, its denizens and social life as Ennis and Ellery solemnize their relationship with a personal commitment ceremony to one another.
QUOTE:
I cant wait either. I,m sure that will be a chapter that will bring tears to all our eyes.