I'm getting teary just reading your story. I know how sad I'd be if I had to part with some of my treasured things.
If not too late, perhaps you can get the names/dates of all the people associated with this quilt and preserve that information for the person you had this quilt down to. Now that she's parted with the quilt, she may have remembered other things about the quilt that she was too emotional to tell you at the time.