I do not see any obvious places where the seams don't match up, or holes, but maybe you could "whipstitch" where the fabric doesn't meet. The size it appears to be now looks like a good sized wall hanging, but I would do my absolute best to finish it; you will never be able to get another one from your dear mother, and after it is finished, you can get {hugs} from her every time you use it. That is a treasure, for sure.