She's lucky her husband was there and armed, otherwise she would have been killed.
I recommend this book.
https://www.amazon.com/Killing-Psychological-Cost-Learning-Society/dp/0316040932
I sure as hell hope they have insurance to cover their legal costs. Also, this probably will result in bad consequences for the couple. The standard an armed civilian is higher than for a uniformed law enforcement officer. (At least it seems that way.)