Can you perhaps practice creative visualization that you are doing but go even longer and deeper into it? For example, take one hour out of today and go to session. Go into a closed room and see your T sitting in a the chair... give her a comfortable one :-)
Spend that one hour as though you were in session with her right then. And watch the clock or set an alarm or have someone knock on the door... you do not want to go over your session time.