This is a great shot, I feel like she's looking right at me! I really like this shot & I agree with everyone that has said the detail definitely makes the shot.
I have to agree with Router Guy and Becky. This is a beautiful face because of the detail. Sure you could "glam" her with some heavy photoshop work, but she would become someone else and would no longer be beautiful.
I am more of the type of person that leaves everything as natural as possible. This is great portrait and I would leave all the detail in it. She is beautiful just the way she is. Your composition is wonderful. She should be very proud of this shot. I know I would. Great expression and focus on the eyes. The eyes seem to sparkle. In otherwords leave her be. You shouldn't mess with perfection.
Would definitely keep the details in the eyes and the lips, they are lovely. Softening the cheeks a little will be more flattering, but possibly make the picture less dramatic.
I like portraits that show people in stark detail. Is it always flattering? Maybe not. But it shows people as they are, which is something that people tend to spend a lot of effort trying to avoid. This is great. The eyes are perfect and the detail on the skin takes what could have been another 'pretty eyes' shot and turned it into a no-holds-barred study of a woman. She looks slightly tired, slightly disinterested, perhaps a touch sad - hints of so many different emotions conveyed by her face. Then the earring shining there contrasts with everything else and adds just a hint of the trappings of vanity that we all possess.