Towards the end of Dexter Season 7, Episode 6 'Do the Wrong Thing'...
Dexter makes a momentary decision not to kill Hannah McKay and instead cuts her free.
At this point, why would Hannah arise and feel attracted to Dexter (and make-out with him!)?
Shouldn't she instead have felt threatened by Dexter's actions? Shouldn't she have felt betrayed that he brought her over to the closed theme park as if to fulfill her long-desired wish but instead had an ulterior motive? Shouldn't she have pounced back at him the first chance she got, grabbing the same knife he would've used against her, back to his throat?