So am I understanding that you are going to put prairie points around the quilt? Warm and natural batting is fairly warm and IMHO will be too warm for your heat. I've been there I know. Why not just leave it out and quilt the two sheets together. Use colored or variegated thread so it will show. You could go back later and add more. Consider using fabric paints to paint a design on your sheets. You can also use fabric crayons.