You might consider asking her if she knows about the judges criteria. Something like - 'LOVE your quilt, you've done an excellent job on it. I've not been around the judging aspect of quilting before, so I don't know how they go about it. It seems fascinating, & there's so much to look for. Had a question tho - I noticed that your back has a summery theme & the front has the winter scenes. Do the judges care about the back working with the front? ' Tell her again what a wonderful job she has done, & that you are going to do your ultimate best on the quilting for her. It doesn't sound critical this way, just curiosity on your part. And the extra praise would soften any alarming feelings she may initially have.