Brian, there's another thread in the DVD forum about "Audition" started by Don:
<a href="
http://chud.nexcess.net/board/ultimatebb.cgi?ubb=get_topic&f=13&t=001151&p=" target="_blank">
http://chud.nexcess.net/board/ultimatebb.cgi?ubb=get_topic&f=13&t=001151&p=</a>
Anyway:
SPOILERS
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Anyway, I think that what we see are dream versions of what he truly knows/suspects about Asami's history. While drugged, we also hear information that was not shared to us earlier (like the restaurant scene). It seems to imply that Aoyama hears what he WANTS to hear, and NOT the real truth.
Then when he wakes up back in a hotel with Asami (this is when his son returns from school), that was just wishful thinking that everything was just a nightmare. It emphasizes the point that Aoyama wants to reject Asami's past and sinister present state of mental health. In fact, despite having his left foot cut off and multiple pins stuck on his person, he still longs and cares for Asami. In some way, it's a role reversal of typical abuse when a man does it to a woman. Here we have a typical submissive Japanese female abusing (an understatement) Aoyama, yet through it all, Aoyama does not care and continues to love her (this is why he hears her speak and see her lips move despite the fact that she's dead).