I'm puzzled by the ending. Why does Guido leave (i.e. go the station)at the end? Haven't things turned out as they hoped, even better than they hoped with the death of her husband by accident. Thereby not having to murder him. What's the problem? Why doesn't Guido calm Paola down when she runs to him at the end? Why is he so chilly?
Is it simply that because there is a wound that looks like a shot he will be implicated? But how can that outcome be worse than the original plan? Is it simply that because she ran away from the police, they will both be held to be guilty? But she could easily come up reasons to explain her running away... and there's no hard evidence implicating them.
I can't explain why Guido is so taciturn and cold with her, at the end. As if he's blaming her for... what?
If there is no good reason for Guido abandoning her, then we are left with the supposition that the essential "reason" is to fulfill Antonioni's fatalism.
But I still wonder how he would explain the ending.
Did I miss something?