You could ask her questions about it like you're just interested in how it works. Then as part of a seemingly logical order of questions ask "What if someone you knew bought them wouldn't that be weird?" If she says no then ask "So you don't care that anybody could buy them?" And if youve made it this far she'll probably say she doesn't. Then ask "What if I wanted to buy them, would you care?" And from there you're on your own