Stang -
If she's been doing this for a while with no results, maybe time to change up a few things? For one, if she's been using thermogenics for the whole time, maybe time to take a break from them? They really should be cycled just like anything else you put in your body. 6 weeks or so - if using something w/ ma huang in it (traditional herbal ECA), then maybe switch to Adipokinetics for a while. Or just go off for 6 weeks or so. Could just use green tea extract for a little kick -- not thermogenic, but at least it wakes you up a little. Other things are those drinks like "Fat Shredder" (by American? I think) -- zero calorie, is non-ephedrine based with stuff like l-carnitine, etc.
Also may change the lifting & cardio routine a little. And you didnt' outline her diet, but the depressing (because everyone hates the diet) is that in reality about 60% of your success in fat loss will come from diet and not cardio/training. Maybe time to examine her food intake and see if it can't be cleaned up more or changed.
A change in general will shock the system alittle to stimulate metabolism. As tedious as all the above sounds, there really is no true "magic pill" - just good, clean, consistent diet & training. Usually takes about 3 weeks before seeing any results from a change, so it also takes a certain degree of patience....
Good luck.
Sassy