If she works at gentlemens club my guess is the amphetamine is to reduce her appetite and give her energy while the anavar is to keep muscle on while on a low calorie diet and possibly increase energy in the gym* (if by energy here meaning being able to workout longer do more cardio and lift more often and longer).
I cant relate to what it must be like to have your income based on your looks. But, both amphetamine and anabolic steroids may increase your risk of developing cardiovascular. I am by no means saying hust say no I am on amphetamine right now. And at one point got caught up in those bodybuilder chemicals.
I think if she wants to do that thats her choice. But, she should know the risks of cardiovascular disease, hypertension, heart hypertrophy (*idk what it is called), sexual dysfunction, clit growthk, l hair and that many especially the fatal effects of amphetamine and steroids occur from long term use and taking both may significantly increase risk of early death and doing it because she wants too not because of external pressure like a boss pushing her to loose a few to make more money at the cost of her health.