Before she comes over, decide what you want to make from the deal and draw up a basic contract covering costs, time involved, how changes are to be made and paid for and by whom. A timeline of when to expect to be complete and what if she doesn't like it. How much you want to charge for your time and experience. Be sure to have whatever deposit she makes cover all the costs of the supplies and be prepared for the transaction to go wrong. I have found that lots of people want quilts and are happy to ask for one. Few are willing to pay what it takes to have one made. Knowing what it will entail, will help determine if she really wants one.