My edge

Genius picture. Genius title.   I agree with tinfoilmedia's observation.  Perhaps you did not notice this when you took the shot, but surely at some level you saw it when you were selecting the best pictures from the set.  The thin black line that approaches from the left, a horizon of sorts, also lines up with bottom black strips of cuff and hem.
 
Now about the title, which is mysterious and intriguing.  On a woman with such beautiful curves, what "edge" could there possibly be?  She is at the edge of her seat, but that is not "her" edge, and in any case, the "edge of one's seat" usually refere to where one sits, not where one stands. 
 
No, the edge in question I think is the bottom hem of her sweater.  The placement of her hand reinforces the possessive pronoun in the title:  it is "my edge", not just "an edge."
 
Her gaze is contemplative, but the partial obscuring of her face by her hair suggest her thoughts are at least partly subconscious.  So the strong hint of sexual thoughts is there.  Several commenters have justly praised the eroticism of this picture.  I do too.  I hope it does no violence to the magic enjoyment of this picture to examine it analytically to understand why this picture works as well as it does.