Call her back and say I have thought about your request for me to make a quilt for your but after thinking about it I decided I can't do it. Do not give any reason or excuse why. Trust me on this. I use to give every excuse in the book when a friend of a friend would ask for me to make a quilt. They kept on finding solutions for my excuses! Now I say 'I don't do that' when asked. Conversation over.