What a blessing you are receiving. Why not make two quilts; One with a Pooh design (or whatever she changes her mind to) and a 'Special" quilt just for baby from Grandma that would tell baby about your love etc. You could make the "Special" one smaller for baby to tote around or to Keep for memories as she/he grows. Just a suggestion. Remember "Every time a Child is Born so is a Grandmother".
God Bless