Maybe she saw the fantasy website as stalkerish behavior. That can be scary for a woman when a guy she knows is doing that. Maybe the site was innocent, all in good fun, meant to be private, etc. But to a female, it can be very creepy behavior, and maybe her fear was simple as that. Maybe she has her boundaries and that is one of them. I hope you and your new therapist can work through all your feelings about the abrupt termination. Sounds like a very tough situation and I hope you can get some closure through the work with your new T.