This person has just shown her ignorance & rudeness. You are right. Three layers sewn together is a quilt. She also didn't know that flannel is made from cotton. You stitched the thread through so you could tie it. She couldn't even be classed as quilt police because she obviously doesn't know the first thing about quilting. People like her should keep their lips firmly zipped. Carry on with what you are doing and enjoy your success. Sound like a case of sour grapes to me.