What is the alternative? She says no and takes only what you offered in the first place. She then scans the prints in oh her crappy scanner that is part of her home MFC and still does what she wants with them! (Don't think that will happen? I know from experience, my mother in law used to do it ALL the time!)

Be grateful if indeed she does print them @ Walmart (or some other chain), as they will be a lot closer to say printing at home on a crappy inkjet...