Is this the twist at the end?
The story of Rory and Dora really happened, but it happened to the author Clay. And that the Old Man never really confronted Clay on stealing his story, he just put that in to make himself feel like the original writer of the story he told would be okay with it, so on some level he could move on and not feel so guilty. When Clay and Daniella are kissing, he begins thinking of Dora, meaning he is still in love with his wife but the truth drove them apart. The last shot of Rory and Dora in bed and Dora assuring him that everything will be fine, is really just a happy ending Clay wished really happened.
Is this sorta right?