Been there and done that. Have found I can be too busy and not feel guilty. Have learned to say- anyone can learn to sew the local tech school offers courses at all levels and times to accommidate people. Even the local sewing shops hold classes. If it's something you need now bring it over and I will teach you how between the other things I'm doing. Also have said-one reason I don't tell many people I sew is they seem to think I'm a free sewing service. I also let them know my sewing is limited and specialized. Give her a started kit of sewing stuff and tell her you'll help her get started so she can enjoy sewing also as well as not have to worry about when you might actually have time amid all you already have to do. Not long ago my husband made a deal that included throwing in my services to hem 2 pairs of pants. It turned into 8 pair and the woman failed to tell me one leg was shorter then the other- last time for that. I also told our son who was just notified he had to pick up a uniform for the high school marching band that I would fit his and a close friend but the others would have to take it to local taliors. Just like our sewing machine refurbishing- We will under certain circumstances repair a machine for someone but we are not in that business full time and do not wish to take business from our local shops.