I would tell your Aunt that what you made it as a gift from your heart to her. That should stop her from asking for a price! Also, if someone want's you to make one for them just say - no, I'm sorry, this is what I do for pleasure and the pressure of a business arrangement would take all the pleasure away for me.
I find that if you phrase things such that to do what "they" want would be hurtful to you "they" back right off!