Any full size handgun will do, a handgun is better suited for home protection than a shotgun in my opinion, a revolver is best, very reliable easy to use, point and shoot, a shotgun is too cumbersome, long, can be hard to function when the heat is on (ie) safety, loading, aiming and the biggest part of all a shotgun is a lot easier to take away from someone. a staut revolver like a smith model 66 in 357 will do best, school her with 38's once shes used to it let her rip some 357's. I just dont understand why people insist on using shotguns for home defense, alot of people think its an easy weapon to shoot and that you dont miss, Go to any 3 gun combat match and you'll see trained competitors miss all day long, imagine 3am shes home alone someone comes in the house, she has to get the big ol' shotgun out, rack it if its not loaded which it should be anyway then defend her territory, its alot easier to grap a loaded revolver ready to roll as soon as its picked up. Just my two cents. McM.