For the record, Appolonia had to have heard the conversation because the car door was open and Don Tomansino was leaning against it for support. Even if she could not hear a conversation taking place, it does not take much gray mater to realize that if you see two people standing next to one another, chance are they are talking to one another.
I don't know if I just find Appolonia annoying or the Sicilan sequences anoying. I think they are the weakest scenes in the entire movie. The movie burst right along with hits, murder plots, a**kicking. Then we see the draggging shots of Sicily. It seems to break to Sicily every time we see a powerful sequence (Sonny's death, Carlos a**kicking etc )
Sicilly was so boring for me because Michael did not hold the leading character at that time. It was the badass Sonny that my eyes was drawn to. We can argue that Sonny may not be a good Don, but he was very exciting to watch. Sonny explodes on the screen! We don't know what he is gonna to do or say. I could care less about Michael's 'pee-pee', Sicilan martial rituals (even thought a lot of the girls were boom-booming the GIs), or Appolonia. I was more interested in the gangland wars and the Don.