Your fingerprint and her fingerprint are stored as highly related by advertisers. Because you shared so many things in the past. IP, Location etc. This is exac

Your fingerprint and her fingerprint are stored as highly related by advertisers. Because you shared so many things in the past. IP, Location etc. This is exactly what browsing via tor is trying to make harder. To fingerprint you. You are right that fingerprinting can not be avoided completely. See the recent thread about FB tracking your mousemoves. Advertisers can use anything you do as a fingerprinting signal. It's not possible to use the web without interacting with it. But your experience is not an example of why using the tor browser would not work. It's an example of why it is developed in the first place. To make fingerprinting harder.