I guess the reasons I found it odd are the following:

1. My friend was actually nude in the play (not that it should matter, since it was a public event... but... does it matter?)

2. The therapist brought their significant other. What if their partner commented on my friend (good or bad)... did the therapist just keep quiet? I don't see how a therapist could truly keep confidentiality with their partner. Wouldn't they be tempted to say "that's my client!" in the moment? I don't know...

The whole thing seems awkward. But maybe I'm over thinking it. Thanks for the feedback.