this used to be a fear of mine, especially since we meet in her house. it's partitioned off (so one just walks in and downstairs to the waiting area/office), but i know when she's not "at work" the partitions are up. i used to think, "what if i just walked in thinking we were meeting, only to find her chillaxing on the couch with a bag of potato chips watchin a movie!"
it's been two years, and i've not gotten an appointment time wrong, so hopefully it'll continue that way..