Hard Candy? (spoilers!)
Instead of arguing Steve vs. Alexandra, I'm reminded more of Hard Candy
SPOILERS!!!!!
Where you have two characters who are essentially pathological & criminal coming together. In this film an insensitive husband & father is blindsided by his sociopath of a spouse.
To me the ultimate message has nothing to do with sex or men/women, but rather that you never really know what's going on inside other people, & you prey (in one way or another) on someone chancing that he or she might prove to be a stronger, more ruthless predator than you.
andy