How would you write a story where protagonist has a crush on the antagonist (they’re both females) due to the antagonist seductive charm, the protagonist falls in love with the antagonist but the protagonist just manipulates her, but they’re are some sexual scenes between them. But the antagonist is a serial killer and the antagonist doesn’t actually want to kill the protagonist because she’s not like the people that she usually kills but does after the protagonist tries to rat her out but in doing so for the first time feels a glint of remorse without it ruining the antagonist selfish, ignorant, insensitive persona?