Absolutely not. She obviously wanted you to have them and by making them into a special quilt for you and/or your kids, grand kids, etc. I think it's a great idea. I think you will regret it if you don't keep them and make yourself something special. My condolences on your loss. I never knew my grandmother, so I think it's so special that you had her in your life, and that you shared your love of quilting.