Sorry Sam, but a shotgun inside a home is not more effective. People just think it is. The pattern of an ordinary shotgun will not open up enough to make a poor shot more effective at the ranges typically found in a home. It has been debated endlessly in gun forums. Fine shot, medium shot, heavy shot, and slugs. Doesnt penetrate the walls, big blast, big hole in the end, sound of it racking a shell in, etc. Ever seen someone touch off a magnum self defense load in a shotgun? Brutal recoil. Not for most women.
Bottom line....the best gun for self defense is the one YOU the individual can effectively manage. Not the one the gov. tells you it will allow you to have, at this time. Now, I will not get into a debate with you about it, your stance is well defined in this forum. I will just direct you to any one of a dozen forums with real experts and real experience and let you chew them up. Let me know how that works out for ya.
For my money, I would have my wife armed with a 9mm Bullpup style like the Kel Tec. At least a 30 shot mag. No recoil for her to contend with, ridiculous firepower in a close space, handy and short and light, etc. Accurate to boot. And they won't be counting the shots with that puppy.