Why is the plot changing!?

I got reincarnated in a bl novel as a villainess who gets killed by her fiance the male lead. Ha right! as if I will let that happen. I will live this life to the fullest!. All I need to do is to ask for an annulment right? Then the trash male lead can fall in love with his subordinate and I can live my life easily right?.
"Emma, I don't know how the thought of annulment got in your little head, but I refuse to annul our engagement." huh?what? why? didnt you hate me? you just want to use me right?
"If you look at him one more time I swear to god I will torture him to death." e-eh? what is this? he is completely ignoring the subordinate. Why are you not letting me go? I am the villainess!