Now, after endless agony, and a dry spell of calm, it turns out that all this time a staff member of the support staff of my online school has been secretly teaching one of my students. He has taken it upon himself to start teaching her on the sly and she let it slip. So, I lost a long-term student to a staff member who teaches her for free. She doesn't need me now. He's free. Do not trust adult Chinese women. (unless you are very thick-skinned and tough as nails)