It seems to me that things worked out about as well as they could have.
The fact that she was with a child - and therefor less able to leave quickly - seems to me to make her decision to draw her weapon perfectly reasonable to me. Fortunately that's all it took to drive him off, so - in my mind - shooting him would have not been reasonable.
Hopefully, If I ever need to draw my weapon, I get the same outcome.
si vis pacem para bellum