styling product for fine hair

I have superfine(baby fine) hair and can relate. I have wavy/curly hair though. I really like to add a little gel (ouidad's tress fx or biosilk gel)to my damp hair and after it dries,I brush it out so that i have soft waves with bounce and i add some biosilk silk therapy to my ends for shine and no frizz,i imagine if your wife's hair is straight she could do the same thing only comb the gel through while wet and then she could smooth the silk therapy when dry or other product to seal in shine without weight and that grubby feeling,I've tried many many products and i love the biosilk line,a good shampoo and conditioner go a long way to a better finished style. I was thinking of trying KMS,they have some finishing creme's to seal the hair and prevent frizz,they have a control creme for styling,she might like that too.Hope this helps.