I understand her rationale, and it is interesting.
However, you are talking about defense in her home, and I have to wonder why in that environment she would voluntarily get into a "hallway" confrontation. The pistol gives you the advantage of inflicting injury at a distance. Why get into close quarters when it is wiser to stay in a larger space waiting for an intruder? If she's in her bedroom, why not call 911 and wait, with a more secure 2-hand hold on her weapon? Is she thinking about house clearing? That's a job for pro's.