My advice would be to say and do what you can to get her thinking about the numbers and the system. Get her to see herself what it is you see.
I was involved in Quixtar myself, and I've been able to help a couple of friends get out of the business by asking them what they thought of the plan and the numbers presented. That it would be a good idea to cover their bases and really look at
Forum:
Multi Level Marketing and Commercial Schemes