I have to agree with Patrice. If she comes over again smile sweetly and tell her right away that you think she may be under a misconception (what we have here is a failure to communicate!) and that you want to clear things up. The fabrics that you have are your stash, they're the things you bought to make things with, and you intend to keep them. However you'll be glad to go with her to a quilt shop (or wherever) and help her select fabrics that SHE can purchase for HER stash. Don't offer to share anything with her, because that will just prolong the problem.