Thing is speculation in a T is really unhelpful, and can provoke false memories in people.

She should be working with the facts as she knows them.
I would bring this up and get it nipped in the bud.
I think T's forget than inexperience or admitting your own lack of experience can often present with the same unwillingness to approach a topic as if you had negative memories .
Hopefully you are able to clear this up and move things along successfully.