Help with granny's Quilt top
H i everyone. I'm a newbie quilter. I have been watching this board from the side lines and really enjoy enjoy and appreciate the info. My grandmother hand sewed and quilted myself a beautiful quilt. She pieced my sister a quilt top but never got it finished. I have the top. My problem is the stitching has come apart on my finished quilt. I'm worried if I finish my sisters quilt the same thing will happen to hers . What can I do prevent that from happening. Do I need to sew over all the old seams. please help. The tops were made forty years ago or longer Thanks