They tolerated Natalie longer than I would have!
I would have told Natalie to leave after the first day. The fact that they were not invited to Sara's funeral would have been enough reason for me not to have had the welcome mat for her. Throughout the entire movie, all I could think was why they were putting up with her.
As for Sara, its obvious why she went as far away from her as possible.
Diane Keaton is a terrific actress but she played such an unlikable character.