This should work, if I can explain it here, and IF there is any kind of "bite, 1/8in" or hopefully a little more? Cut a double fold binding about 1" or so wider than normal for you. Iron lengthwise so you have a defined foldline. For the sake of this example I will use 3/4 in as the measurement for the next step (width of binding when done x2 = top and bottom) Measure 3/4" + your seam amount from fold and draw line down all binding. Your seam amount will depend on how much she left you for seam allowance. Place edge of quilt on binding with raw edges of quilt on mark, having both edges facing same direction, so that fold is under quilt. Sew quilt to binding, hopefully leaving at least 1/8" inside of stitches. Stitch another seam a few threads inside that first seam. That will help secure the thin edge to the binding. You can trim the inside part of the binding if it is too wide but you might need it to fill the binding when you fold over. You could also stuff with a thin strip of batting and sew the batting to the inside part of the binding if you need filler. To secure the small seam of the quilt to the binding even more, when you turn to the front, you could use a decorative stitch, or the buttonhole stitch. That would secure the small seam even more so that it could not pull away. Hope I explained it correctly. Please do a small sample first. Good luck.