As a mother, it would haunt me to know she was exposed to wind, rain and cold, etc. Maybe that's why KM doesn't talk anymore. But her body language speaks so much about anger.
The only time I can connect with her is when I see her carry Madeline's favorite little stuffed animal.
Then again, I think that's a really big clue. And I think one thing it shows is that Madeline was NOT in bed when she disappeared.