Get the diet dialed in, cutting out the high fruitose carbs, and simple carbs, and go for a 3 mile walk every night for a week. I guarantee she'll see results. You burn the same number of calories walking briskly as you do jogging the same distance, you just don't get as much of a cardio benefit. The only exception is if you are running 5-7 minute miles, then the calorie expenditure increases quite a bit.
The stims will only moderately boost calorie consumption without any real cardio. If she's already doing cardio, then get her doing leg excercises on machines. My favorite used to be a machine called the 'butt blaster 9k'. I'm not kidding. You laid over on your chest, and kicked back and up pushing a sleigh with various weight up an incline. It was great. My GF used to love that sucker too, she'd do like 100 reps with 50 lbs in 3 sets. Resulted in some very pleasant shaping results.