I'd ask her if she had any pattern(s) in mind, then come up with one, give her yardages needed, and offer to go with her for fabric selections. If by then she is still interested, she should give you $$ for your time and expertise.
I have a friend of my daughter who is wanting me to make 2 quilts for her before Christmas. And she wants "big lap" size or bigger on both, and 2" finished triangles. Ha! I think she thinks I have nothing better to do! I still have projects of my own I am trying to finish before Christmas.
I did offer to help teach her how to sew, but it seems she is not interested. Live and learn! :)