What Did Margot Macomber Do?

In one of Ernest Hemingway's short stories, The Short Happy Life of Francis Macomber, the story has quite the shocking ending. Francis Macomber's life is ended while he is right in front of a charging bull. He did not die from the bull, but instead his wife, Margot/Margaret Macomber, shot him in the back of the head. The question is, did she mean it, or was it an accident?

Some people argue that it was an accident, while others argue that she truly meant to kill her husband.
My argument is somewhere in between, however, it does lean towards accidental murder.

Margot Macomber shot her husband. That is fact. Also, by her words at the end of the story, she quite clearly regretted her decision. Repeating "no" and "stop it, please" over and over again shows how distraught Margot is at that moment when her husband is now dead.

Margot's attitude towards Francis for the majority of the story was that of a superior. She would always talk down of him and even kissed and flirted with Wilson, who was the guide of the safari. When Francis loses his fear of the lion and all other things that he could encounter, he begins to rupture the stable control that Margot has on him. This possibly angered Margot, or at least made her think. We see in one scene where Francis wakes up in the middle of the night to find Margot not in their tent. When she comes back, she states she was in Wilson's tent and they were playing games. (Very naughty games I can assume) Margot was gone for a very long time, and yes, she could have been having an affair with Wilson, but he could also have been teaching her to...

Wait For It...

How to shoot a gun.

Now Margot has the skills to kill her husband, and the anger to create a motive. However, lets fast-forward to the kill. Margot hits her husband "two inches up and a little to the side of the base of his skull. Hemingway mentions the base of the scull as a focal point because it is most likely where Margot was aiming. Why did she miss then? It could have been from the recoil and bad aim of the 6.5 Mannlicher she was using; but I think she had a doubt. That may be the reason why she did not hit dead on: because she tried to pull away. Sadly, guns are much faster and more powerful than human reactions, meaning Mr. Francis Macomber was dead once Margot began to carry out her plan.

R.I.P. Francis Macomber