Do it!
As your signature says, "If you always do what you have always done, the results are your fault."
In this case, your result would be that you would always regret giving away quilts made from scraps from your Great-Grandmother.
By the way, there is no selfishness involved with deciding to make quilts for you and your family from the scraps. It's your way of being close to your Great-Grandmother, and sharing memories of her with your family. That's called LOVE!