The wider the gap between how we view ourselves and our image of the ideal body, the bigger our body-image problem. If you discover your wife struggles with her body image, you can help her by conveying your positive view of her through your touch and through verbal affirmation without sexual expectation. In addition, there may be efforts she could take to improve her view of her body. Sometimes exercise or weight-loss programs make a difference, but these must be her ideas, not your agenda for her. It may also be important for your wife to adjust her image of the ideal body.
Many women try to measure up to media personalities.
To define beauty on that basis is unrealistic. Both are important but since God accepts her as the beautiful woman he made her to be and you are the man looking on the outside, you can help affirm that perspective.