Although your friend's wishes for his wife are well intended,
owning a gun is not the same thing as successfully using a gun. And exactly who will be there to practice with her, etc. And let's not even get started with all the legal ramifications.
Instead, I highly suggest you get her a
Kimber Pepper Blaster which costs about $35 on Amazon...
? It requires no training other than point and pull the trigger.
? She can carry it anywhere she goes. Malls, school grounds, etc.
? If she gets scared and fires on the meter reader one afternoon, in 15 minutes he'll make a complete recovery.
? A lot of attackers can get close enough to disarm a woman. With CS she can fire first and let the cops sort it out the mess later. You can't do that with a gun.
? She can order more if she feels the need. One for the car, one for the purse, one for the bedroom, etc.
? She won't need to live in mortal fear of a child finding the weapon. If there are children or grandchildren around, you and I both know the gun is going into the top of the closet, never to be seen again. Certainly never to be available within 90 seconds.
? The item home intruders want most is handguns. Simply owning a handgun may precipitate the very act she's in fear of experiencing.
A handgun is great for you and me, but we have years invested in practice, learning the law, getting licensed, doing the drills, etc, etc. But a handgun is a terrible thing to give the average housewife. Especially since the serial number will be traceable to you.
The Kimber
Pepper Blaster is the only CS delivery device that can sit and wait for years.
https://www.youtube.com/watch?v=YnWFJZkdB8Y