You know, I put myself in a similar position. I teach violin and for a graduation gift, I made a tee shirt quilt for a student.... not thinking to ask for money for the backing and batting.... Well, now this year her sister is graduating, and I have to make her a quilt, too. It wouldn't be right to NOT make her one. Their friend is also graduating and taking lessons from me, so she knows about the quilts. I can't NOT make her one, either. So, here I am, footing the bill for the backing, batting and thread... not forgetting the iron on interfacing. I know I won't do this again. I'll ask the student if they would like me to make a quilt for them, and if they do, I'll bring them along to buy the backing, and everything else. After all, I'm not charging for labor, it IS a gift. I suppose that's why I didn't ask for any money in the first place. I want it to be a gift, but it's a pretty expensive one.