My mother (who has never been a gun fan) is finally coming around. She's decided that it'd be smart to have a weapon for HD (CC'ing is still a long ways away with her - handguns in general as well). She's used a shotgun before, and knows the basics of how they work. I'm trying to help her find something that would be good for her to keep in the house in case something ever happened. She's almost 50, about 5'6", probably no more than 130 pounds (rough estimate, I have no idea her actual weight). She'd probably do best with a .410 or a 20 gauge. Pump action is much preferred (she likes the recognizable sound of the pump), and something with (legally) short barrel.
Any suggestions of a good, reliable, but relatively inexpensive shotgun that could fit these requirements?
Thanks in advance for your suggestions!