The Macbeths and children

In lecture Professor Britland talked about how Macbeth was afraid of fathers and their sons so he killed anyone who was a father or would become a father. This makes sense to me because the witches tell him that Banquo’s sons will be kings and not his own. The Macbeths have no children of their own yet and he may be a little disappointed and jealous that his friends have children already and he doesn’t. Lady Macbeth doesn’t seem like she’s interested in having any after she says things like “take my milk for gall” and that she would dash the brains out of her baby. However in the 2006 Australian film her character is very sensitive to children in a way that I couldn’t find in the text. The film creates a new scene that shows her weeping over her son’s grave, clearly devastated by the loss. This scene could work for Macbeth (who is in it too, but not showing any emotion) because of his actions toward fathers and sons later, but doesn’t for Lady Macbeth. There’s another scene that shows her madness as being caused by the news of Macduff’s wife and son being murdered. It seems like a good way to justify her madness in the film, but based on what is in the text her attitude toward children is not motherly at all. I think this should not have been in the film because it deviates too far from Lady Macbeth’s androgynous character.