Bills daughter is the key to this movie

I've thought about Eyes Wide Shut for quite some time and what struck me as the most viable explanation for this movie is that in reality it's the daughter that is the center piece to this story, not Bill, Alice or even Ziegler. The main connection that, as I understand, Kubrick makes is that in reality the 'phony sacrifice' of the masked woman at the party is actually the sacrifice of Helena. Bill to save his wealth, marriage and status literally sells his daughter to the powerful elite. It directly correlates in the scene where Bill returns his costume and as in a reflection sees the costume shop owner selling his daughter to the wealthy Asian duo we saw earlier. It's also visible in the final scene; the scene where Alice teaches Helena about wealthy boys and in the scene after the Somerton where Bill enters Helena's room and sees the word SEX above the bed.
I would really like to know your thoughts on my theory. And I apologize for my rusty english.