Ah! You have made a lace kivver! (At least, that's what the farm folks on my father's side would have called it....) When knitted or crocheted clothes started to wear out (or got moth-eaten), the yarn/thread was pulled out, hanked up & washed and made into lacey blankets which were then lined (usually with a pieced liner made from scraps). You made one perfectly! Oh, the lining (without the lace) is a kivver (I think it would properly be called a counterpane.). Nice!