The fact that she is open to going on dry runs is a great sign, that she is playing out the details in her head. As she extends herself a little bit further each time, she is minimizing her fears and increasing her comfort level with actualizing the dead. Keep giving her lots of opportunities and positive experiences, provide a super safe space for her to go further and further. Eventually she will be comfortable enough to let go and consummate the lifestyle. Mine did eventually, took a very close long-term friend, and about 10 months. But once they cross the line, it can be off to the races.