Well...you learn something new everyday when you call in at the quilting board! Been a long time since I was a nursing mother, but I don't think this would have appealed to me when I was younger.
I had a collection of very pretty lace shawls...generally black..used them to cover up then tied it over my skirt or slung it over my shoulder....bit bohemian, but that's how I dress anyway. Very useful when travelling and you can even fashion a shawl into a baby sling if you get a bit desperate.