She doesn't like the heavy 9mm, so she isn't going to want to pickup a shotgun.
Any of the pocket .380s but I feel a revolver is safer for the wife so she has the model 66 357 close by. She only has to pull the trigger as long add the hammer strap, is loose it fires. I don't like an auto laying around loaded and she would forget to chamber a load.
Sent off camber