Belly fat. Belly fat is some times related to abnormal estrogen and receptors .Check lipids, Insulin resistance, thyroid lab test, and determine if she is developing metabolic syndrome, and or Insulin like factor resistance. Starting eating less fat food, low carbo, low sugar and candies, increase water , add exercises, reduce rice, increase white meat , vegetables, avoid canned food . Consult endocrinology.
See below. Monitor diet, food intake. And excercise. (some people just have problem areas, but try the above first).