Just call, and say "I haven't heard from you. How did the quilt turn out? Did you take pictures of it? Were you able to use any of my fabric?" This would gently remind her that the fabric was yours to use, and you were kind enough to share. This also opens the door, to claim you have decided to make a flannel quilt too, and could you pick up the excess? Her immediate response will tell you if she forgot, or just used you. In the meantime, you will have let her know gently that she has been thoughtless. Walk away with your head up. You would never treat someone so shabbily.