retribution or vengeance
a person or thing that is the agent of this
one's downfall or ruin, esp if deserved
A Nemesis attends the woman who plays the game of elusiveness too often, in the utter contempt for her that, sooner or later, her old admirers feel — Hardy
[Latin Nemesis goddess of divine retribution, from Greek nemesis retribution, from nemein to give what is due]