Okay, so I decided to compile the reasons why I think they will be together. She dreams of sex with a corpse in ADWD: So to me that implies at the very least that the she will be sexually intimate with the men in the bride of fire sequence. The mother of the direwolves was huge: Ghost is a male so he should be even bigger. Dany hears a wolf in the distance in ADWD. I believe that this is a subtle clue. Jon thinks that Val and Ghost look like they belong together. There is a sce