See I am the type that no matter how long it takes me as long as someone else is paying for it I do it for them at no charge. But like I said thats just me. I feel this way about a lot of things in life, cake decorating is one of them. As long as someone else is paying for the stuff that I need to hand them a finished product I will do it at no charge! But I will not put ANY money into the project.
I love a few of my friends kids so I keep the little buggers just for the sake of spending time with them....see where I am going. I say if YOU are ok with the 50 dollars that you charged her then its fine. If you feel like you cheated youself then maybe next time think about what your charging before you commit to a price! Good luck, can't wait to see the finished quilt!