My T has sworn before, and so have I. I don't swear a lot, but if it gets the point across I do.
I think Ts should be conditioned to that kind of thing anyway because they're supposed to help people, whether they cuss or not.

When I was IP one time we had this therapist trainee run the sessions (supervised, of course). She had the shock of her life when we talked about PTSD experiences and we swore a bit. We felt she had a long way to go.