This looks like it was shot on a sort off overcast day but with the sun pretty high.
Your wife's skin is overexposed and really without much detail or color and her sitting facing the camera straight on is not a flattering pose.
She is pale, as is her dress and there are bright colors everywhere in the background that pull my eye.
The dark strap to her purse and the bright shoes all hurt this image.
She is lovely and deserves better, throw it away, get her in darker clothing that sets off her beauty and pale skin and pose her against a less obtrusive background.