You're all right, of course, the coach shotgun with 12-gauge No. 1 buckshot would not be a nice thing for anyone to fire who won't even do .45 ACP..
My wife realizes the coach shotgun would be a last resort. If an emergency got that bad, she'd use it. Theoretically. It's a pretty simple procedure and she can remember it while not remembering many other things about firearms.
For too long I was dumbing down home defense to calibers a typical smaller woman could use. Same dilemma that confronts law enforcement and the military. I'll not make that mistake anymore. If crap ever hits the fan, I'll be the one who has to provide 95% of the defense (she can dial 911 on her cell phone).
Actually I don't think she has the will to ever fire a gun in self defense. Some people are like that. Can't be helped. But I do the best I can. She has a last resort weapon and knows how to use it if she ever had to and if she could ever muster the will to fire.
Meanwhile, this summer she can try some Aguila mini-shells and No. 8 birdshot in a fun skeet setting. If she is comfortable with that, then a couple No. 1 buckshot. We shall see.
Meanwhile, I am very happy with the XD .45 ACP.