if she returned in the past, what would become the future her ? does her soul will enter h...

This is also the eventual dilemma of the story in the spoiler forum I've read. They said it came around the time her parents already knew her real identity and around the time after the father remembered his past life at Korea. I don't know if they updated it but I read the spoilers at novel updates, just type in the title and add 'novel spoilers' to the end and it should appear once you clicked the search button.