So the whole time she was the real soul of the real "Adeline".
So, the brother and her changed names as well as she changed souls with the original Haley. All I can say it's that... Well, I was into the thing that Cedric was in love of Dillon, breaking the original plot and changing his destiny cause everyone is free to change their stories, but you came and say that he actually ended with the real Adeline? I'm a bit disappointed. I loved the story but I would like to think that Dillon and Cedric wasn't meant to be, but changed everything and ended together.
And I'm a bit pi** off with Katarina. I mean, WTF girl? You created a new world and a new life, get the man of your dreams only for say "Actually, i really didn't want you" and JUST THAT? But also is a bit sad, cause once she have everything she wanted, she realized that she truly didn't want it at all.
Thinking about it, since the beginning probably the "book" that Dillon read was the memories of her past life. Probably if I re-read it, I think I would find more clues about Dillon being the real Adeline the whole time.
