Can't believe it is your first --fantastic job. When I display my first (a Dresden Plate that took me 20 years to finish), I place it on my bed and have folks stand outside in the hallway to look at it --- too many errors to see if they came in the room. Thank goodness my colors look good from afar.
Obviously your sis doesn't do any type of sewing or crafts -- if so, she would appreciate it for what it is - a beautiful quilt made with love that will keep her warm, soothe her aches, and hold her tears!