I ran into my therapist inside a store once. The store was near his office, but I still felt jolted when I turned the aisle corner and there he was. I didn't know what to say or if I should say anything, so I just nodded at him and kept walking. A little while later, he texted me about it, one of the only times he ever texted me about anything. Maybe he thought it upset me, but he only said that it was funny that we'd see each other there. And that was all that was ever said about it.

The point is that it's not a big deal for them. They have a lot of clients and the potential to bump into any of them in public. It feels awkward to us, but it's really not that bad. And it certainly wasn't intentional on your therapist's part. She may never mention it.