I think we all have gifts, and if her gift isn't sewing or quilting, nothing you do will change that. She might try it to please you, but she might be miserable doing it.
You mentioned she does not use her time wisely. She might not think she uses her time unwisely at all. (In fact, I have had some people hint rather pointedly, that cutting fabric into little pieces and sewing them back together again is a very unwise use of time!)
IMHO - since you asked for the advice, offer the opportunity to her, and then let her decide.