You have a good heart. An idea here: let her buy the batting, backing and whatever else has to be bought: including all the thread. That way, she will know upfront what goes into this quilt. I had a friend ask me to bake and decorate her daughter's wedding cake and when I let her know what was expected in terms of buying the ingredients, she decided to buy a sheet cake from Sam's !! The day after I said I would bake the cake, her MIL asked me to bake her DGD's wedding cake too. I thought about all this and cancelled both of them.