Nycphotography gave you an EXCELLENT C&C!!!!!!
One suggestion...portraits often look better when the person has a bit more "visual support" for the head. In your shot, the camera is a bit too close to her, so the framing is somewhat tight, and her neck just sort of "appears"...showing a bit more shoulder would help. That could have been done by backing up a bit, and as nyc mentioned, placing her a bit more to the left of the frame. In the shot as-shown, her neck just sort of "appears", with no visible means of support really clear in the shot, so that is what I find most in need of improvement. Not to harp on it, but that is one benefit that shooting portraits of single people in the "tall" camera orientation easily allows--it allows plenty of space to be allotted to the shoulders/chest, AND at the same time, allows for a larger head-size to be shown, since the frame is taller. And a larger head-size gives us a bigger face to look at. And, in this scene, a tall camera orientation would have forced you to eliminate the lamp on the table, OR if yuo wished to include it, you would have had to back wayyyy up, and then the shot would have been an "environmental portrait".
I think backing up, and shooting in horizontal orientation might have made a more-interesting portrait--and environmental portrait, in which we could see her seated in the chair and so on.