I really don't see it as a big deal at all. It's just a piercing, it can always be removed later and it will be in a place that is covered and not visible to everyone.

Make sure you take her to a good piercer. Make sure they have an autoclave, if they do not have one go someplace else! An autoclave is what is used to steralize equipment, hospitals also use them. Make sure the place looks clean. The place I go to for piercings looks like a hospital.