He didn't tell her stuff, persay. Lots of people hire trainers pre-competition. They handle everything you eat, drink, how your exercise, how you taper off your water and what gear/supplements you take.
All I'm saying is that isn't accurate, if people are thinking she did that all with BFL. She did the pre-comp stuff with strict dieting, calorie counting and "whatever" else. She did however make an amazing transformation through BFL.