Hi, exoticbeauty. I know of a product that'll zap her frizz and will help to thicken and shape her waves. Living Proof Wave Shaping Curl Defining No Frizz Styling Cream is fantastic for holding curl and keeping frizz away. It's a great frizz-fighter that perfects smooth, soft waves and holds them all day. No Frizz addresses the two causes of frizz—humidity and friction. It provides a superior, extremely thin humidity barrier on hair while reducing surface friction. This styling cream contains a touchable, soft holding polymer to give your waves and curls added definition without any stiffness. Your hair is left sleek and manageable without becoming greasy or heavy. The No Frizz formula delivers PolyfluoroEster to the surface of your hair in one even, perfect layer—without any additives. This styling cream works great on color-treated hair and is terrific for highly processed hair, too. No Frizz also repels dirt and oil so you can go longer between shampoos. It comes designed for different hair thicknesses which you can find it here: http://www.sephora.com/browse/product.jhtml;jsessionid=NICDNXF0P3CGYCV0KRRQX0Q?id=P254201&categoryId...
Hope this helps and have a great day!