female
Mott is the main antagonist of the 1992 psychological thriller film The Hand That Rocks the Cradle. She is a vengeful widow who poses as a live-in nanny in order to kill the woman she blames for her husband's death and steal her family.
Mrs. Mott/Peyton Flanders
Best Villain
for Best Villain in Best & Worst of Fictional Villains.
Suggested by matthewchadd
The best and worst of fictional villainous characters.