I would give anything to have quilt done by my mother whether she completed it or her sister.
Stop being so harsh on yourself. Give it to her with a smile and a hug.
She will be forever grateful especially if mom gets to the point she does not remember who her DD is. Then DD can wrap herself up in the quilt and cry, laugh, sob, pout, whatever her heart desires and be wrapped in the love of her mother and her aunt.