She’s in love with him. She knows she shouldn’t be but sadly enough we can’t control who we fall in love with.
Also even if she did leave she would get reincarnated again but I’m not gonna explain that because that crosses into spoiler territory.
Even if she does get reincarnated. Dont marry him and keep the hell away from both the stupid man and her prissy sister!
If she is making the choice to marry him despite knowing the outcome...she has intelligence cancer.
It’s not just the fact that she gets reincarnated if she doesn’t marry him. She has to be there. If she’s not then the timeline starts to fall apart. Read the novel.
If she knows he doesn't love her and wants to be with the sister. Even the family all prefer the sister. Can't she just not marry him and say "take her sir, I'm off" ?
Why is she going through the torture of this endless cycle of rejection, pain and betrayal?
The sister is effing annoying.