What did Margaret do?

In the end of Ernest Hemingway's "The Short and Happy Life of Francis Macomber", Margaret fatally shoots Macomber in the back of the head. She seems appalled by her actions and cries as Wilson reassures her that it will be alright, although rather sarcastically. I believe that this wasn't an accident and that Margaret shot her husband on purpose because it was in her interests to do so. She only stayed married to Macomber because he had a lot of money. After the first buffalo hunt, she notices the change in Macomber and how he is suddenly brave, and she realizes that he can and will leave her after all of the affairs she has had and her constant rudeness. She can now see that she doesn't have the power in the relationship, and it scares her. Upset by her failure in the the modeling industry due to her age, she becomes bitter and wants Macomber to feel like as much of a failure as she is because it makes her feel more powerful. The execution of her plan seems like it was a decision she made in the moment. It was clear that the buffalo was charging for Macomber and Margaret might have felt the instinct to protect him, but realized that it was an opportunity to rid herself of Macomber and inherit his wealth. Even though she starts crying, I don't think she was mourning the death of her husband. I think Margaret was just suddenly hit with the full impact of the realization of what she had just done. It is possible she felt a little shred of guilt. Wilson doesn't seem fazed by the events, and appears to have known her intentions. He humorlessly cracks jokes while Margaret sobs. Both Margaret and Wilson know that Macomber would have left her after he got the confidence from the buffalo hunt. I think that the pressure of knowing that she was more of a failure than her husband and that her source of money would soon be leaving her was too much for Margaret to handle, and it drove her to intentionally shoot her husband.

Six Word Stories

You're gone, but I'm still here.

Paramedics completed his text, "...love you."

Girl, 5, waiting to be adopted.

Her casket. He sobs. Finally sober.

The guilt won't let me sleep.

Peace gone, now there is war.