Looking at the costume of the character, she has an apron on and obviously you can tell she is a woman. To say what this character represents is clearly defined by her costume, she represents a house wife. To compare this representation to another thriller i would use 'Psycho'.
This a mid shot of the female character from 'Psycho' whats similar about this to the image above; where the female character from 'Black Widow' is the cleanliness. These two images show the neat and tidiness of a stereotyped woman.
The differences are that the female character in 'Psycho' is the victim, which is a typical convention and within 'Black Widow' the female is the murderer.