oooooh.......I like nativetexan's idea.......add (topstitch) a new and wider sashing overtop of the old one. Then I would also add more quilting, like an "X", a heart, or a star in each block. If you like hand stitching, a long stitch in red pearl cotton would look homey and cozy with that quilt.
Sorry for your trouble. I just spent 4 hours this morning recovering from a mistake I made. It happens to all of us. Good Luck.....Jane