Maybe just be careful not to put temptations in her way, don't comment at all on her efforts or results (my husband would NEVER ask me what I weigh and I appreciate that. I could also sometimes do with a little more reassurance that he thinks I'm fine the way I am. Believe it or not, that would not demotivate me from trying to improve myself), and keep doing what works for you. You can probably cheat a bit without it hurting your results, maybe not the same for her. If you do that in front of her, it can be tough.
If she really seriously wants to know about how to make this work for her, direct her to the articles on site.