Question re Ennis' daughter.

Rating: 9/10 (28 December 2005)

I do not understand why Ennis's daughter came to announce her engagement, because it occurred amid the devastating climax after Ennis learned about Jack and immediately before the last scene. BBM is a great film rolling toward Oscar. Why, then, this distracting scene unrelated to the central issue? I don't recall it in the short story so what was the purpose? If you know, please share with me. Or, do you agree with me that Larry McMutry went out of control at the end? And, did he have to get approval from Ang Lee and Annie Proulx for this incredible error? I realize every film has some flaw, I suppose but maybe I'm wrong and this is not a flaw.