I guess anything is possible. If what she wishes is to keep the dress looking as a dress, ask if it will be OK to separate the front and the back. You could applique the dresses to a whole cloth quilt, maybe after is quilted. That will keep the dress looking like a dress. If she really doesn't want to cut them, maybe you can applique the whole thing. It will be a real heavy one, but I guess that will not be a problem. If they are small you could arrange all 5 of them into one quilt. Just sewing a zig zag or blanket stitch around the whole thing. I can not imagine loosing a child. So sorry for her loss.