Yes, I once had a therapist whose wife kept oddly popping up at the edges of my therapy- either running dramatically out of the home office seconds before my session time, or walking back to the house as I was leaving. It was disturbing- made the whole thing seem leaky.

I’m with mostlylurkng- I think it’s better when therapists realize how much that kind of thing can affect people, and work extra hard to avoid such encounters.