A Reaper's Muse
Theres two possibilities here.

A
A grim reaper has conditioned a young female into his perfect apprentice. A sexy puppet of death, she lures in unsuspecting men to certain fatality.

B
A cunning young woman has used her smarts and sex appeal to move up in the ranks of the underworld, eventually earning the affection of a reaper. Death thinks he has the upper hand, when really he is being manipulated.

What do you think?