Aren't we missing the point a bit?
I think the whole point of the movie was to show that people are NOT perfect and when it comes to alzeheimers there rarely are happy endings.
grant was clearly a flawed individual - there was the real suggestion there that he was prone to cheating on her and similarly the ending suggested too that julie christie's character may have been playing head games on him by exaggerating things so she could 'punish' him.
i think sarah polley, the director, wants us to make our own mind up on the two of them. one person watching it may come away thinking 'god that grant guy was an awful cheater and by the end was dying to get rid of her so he could shack up with olympia dukakis' and another person watching it could think 'grant saw after much observation that he had effectively lost her mentally and that he wanted the other guy returned to the nursing home just to make his wife happy and bring her some level of peace'
i loved the film - despite the fact that it didn't have a clear happy ending! hollywood is obsessed with happy endings and tying everything up in a neat little bow and i applaud Polley for having the guts to not create a happy one.
this film primarily made the viewer think about the disease and of it's effects on not just the sufferer but there extended family too. my auntie is in the latest stages of alzeheimers - i'm grateful to this film for bringing the disease to the attention of the public. and we have a great film so well done.
Y'know, kid... you got a helluva knack for killin' a conversation