quilt [kwɪlt]
n
1. a thick warm cover for a bed, consisting of a soft filling sewn between two layers of material, usually with crisscross seams
2. a bedspread or counterpane
3. anything quilted or resembling a quilt
That is the definition of "quilt". You are making a quilt for your grandson, because you love him. And he will love it. Don't let yourself be hurt by her words.