This is food for feminists
The question is not "what the guy has done?" but instead "what Alexandra has not done?
The man has a good job, he loves his kids, is still sexually attracted to her wife (see his enthusiam during the strip part, wow what married woman would not dream about that?) how can this man possibly think that something is wrong? Get in his head a minute. Yes, he may be blind and I know it can't be all that good but If his wife is too much weak to stand up and communicate, he can't do nothing because he's not aware of how much emotional distress she is going thru. She was reduced to a sexual object during all these years!? Oh! please, enough cliches already. A marriage is a 2 way thing. She was ashamed of herself for what she has not done and when she realized it was too late to get back and start over, she just blows a fuse. This could have worked in a way of a message to all the women saying "realize before it's too late" but that's not the feeling I get at the end. I get the feeling that the Alexandra won, the women always win and will take children away because they're the smartest and strongest. Wow she's gone, what a plot she came up with. The husband got what he deserved although being the best man he tried to be. That's the way the average viewer will see it in my opinion. That's sad because the true reason why this happens is because of the weakness of the wife. Of course she may not have been happy, so she should have leave then! This movie does a bit too much.
Oh! did I say I liked the movie anyway? I really did. It is very well made and was absorbed by the atmosphere it created. But please, I hate that 40 years old feminist feel crap to it.