(SUPER IMPORTANT MESSAGE TO FOLLOWERS) Please, vote for which idea is better down below, I’m leaning towards option one but I really need some guidance.
1) Klaus or Elijah Mikaelson’s daughter from before he was turned, grows up and they lose contact after a couple hundred years, she ends up falling in love with Damon Salvatore in the 1800’s and they get married and the plot continues from there, only for him to feel betrayed when the Originals come back to Mystic falls and he never knew the power she held. This book would include a lot of flashbacks from the 1860s—2000s, as well as it would follow the TVD plot.
2) Damon or Stefan’s daughter from before they turned that they were reunited with in present day Mystic Falls, only to find out that she was working with the Originals the whole time as Klaus or Elijah’s love interest.