I honestly think joining was the best decision you could have made. I hated when others suggested flat out lying to her or hiding it from her as I'm sure you don't want to do that to your best friend. I think I'd be pretty upset if my best friend started ordering from someone else, but I'd rather have her tell me than not. But this way you avoid all awkwardness and you'll know about the specials and be able to place your own orders!!!