I am so sorry for the lost of your mom. Mine passed to the great quilt shop in the sky in 1996. I didn't take up quilting until 2003. I miss her advice. She completed her first quilt in 1932 at the age of sixteen. She quilted all her life except for when my sister and I were growing up. She sewed us our clothes during those years. After we left home she made quilts for herself, and mostly charity.
Please cherish those quilts. Yes, use them. Make sure her grandchildren will have them after you are gone. But only for the ones who will appreciate the value of these treasures.