I took it to mean that Brooks duped her. He easily could have been dropped off by Vickie and walked into the building, wait for her to leave then either sit in the lobby for a while (lots of people sit in medical center lobbies waiting for loved ones at appointments, so it would be no big deal to do this), or leave and go have coffee somewhere. He could call her later to pick him up. All he would have to do is wait outside, or in the lobby for her to pick him up. Just my thoughts.