[It's not as if Giovanni is ignoring this conversation completely. He's listening to it quite carefully. Quite frankly, hearing it leaves him with a sense of mixed amusement aimed at both participants. Some parts make him amused and partially proud; others sicken him and make him more upset. In all, he doesn't react simply because he's not quite sure how to. And he doesn't need to make any more a fool of himself than he already is managing elsewhere.]
[not here]