I've not yet seen the musical but watched some interviews with Jackie post Queen of Versailles's and agree that this detail immediately spoils what is otherwise one of the few genuine, human moments I've seen of Jackie. In real life, her daughter did indeed include a note in which she encouraged her mother to publish the diary. (If I'm not mistaken, I think her daughter even included a slight dig that it would be a good way for Jackie to get on GMA, or something to that effect) Given her clear discomfort being on display throughout the documentary, it definitely seemed a little odd. Perhaps she knew it was something her mother would inevitably want to do, so shrugged and gave her blessing.