Huh. IMO, exposure (or any other kind of therapy) is only entered into when you consent to it - they're not supposed to spring it on you. And unless for some reason that kind of verbal "exposure" is in line with your therapy goals, I'd think that you are within your rights to tell T to clean it up, you don't have to put up with that.

It may be that you & T have widely different viewpoints in this area, if so it might be good to get it out into the open. but remember, it is YOUR hour; you CAN say how you want it to be.