FWIW, I'm 99% sure that C wouldn't want to listen to a voicemail from ex-T (S) either. And I understand why. It would basically be prolonging the torture of losing S - it would be tantamount to cutting myself in front of him. It would also bring the pain of that relationship into my relationship with C. It would do no good. C would be far far more inclined for me to discuss why I want to play the message, because that's where the therapy work is, not in listening to the message itself.