I would charge her for supplies plus $200. If it was for her, I'd just make it and give it to her as a surprise for her birthday or something, but since it's for her boyfriend, and it's a gift from her to him, not you to him I think you should charge a reasonable, if discounted price. Also, keep a diary of the time you spend working on it, and when you give her the completed quilt, you can show it to her and calculate what your hourly rate ended up lol. That will also make her think twice about asking in the future and it will make you more aware of what you should charge if this comes up in the future. I agree that if you only charge for materials word will get out and pretty soon you'll be overwhelmed with requests. Trust me, they will come out of the woodwork.