Do you value her friendship? If so, offer to have her work on the quilt with you. That way, she can see the process as you go and more importantly, why you set the price you did. Most people don't have a clue about making a quilt - they think you put the fabrc together then sew it. Sounds really simple until you actualy start doing it.
So, a work day - with her - sounds in order. I'd hate for you to loose a good friend if she didn't like it, but if she's taken part, she might enjoy quilting!! Then, you'd be her teacher and have the pride that comes with sharing your knowledge!! :)