Quite frankly, I don't see the issue here. I mean, you give off the impression of wanting to share your work with others, yet once it slips through your fingers and you see it appearing on someone elses website you start whining about copyright and threats of legal consequences. It's undignifying to hear this from people who are supposedly artists. I mean, unless you view this website as an immediate threat to you or consider her a competitor cheating in some contest for recognition, I don't see why you would waste your time trying to get her to delete these images. Just my views and an angry finger waving, you may ofcourse disagree.