For someone that is not going to spend a lot of time learning to shoot it, a revolver is really the only choice. It has no levers, safeties, ect. All you ever have to do is pull the trigger. She will not be able to reload it in a SD situation but she wouldn't be able to reload anything most likely. It seems the only choice to me.
I would get something larger than a snubby if you could because it she is not going to be packing it so might as well dampen some recoil. I think a .38spl is the ticket. Maybe a nice used SP-101 or 3" SS K-frame would be the ticket. You can load it with light loads so recoil should not be an issue. I say SS because it is less likely to rust in the car.
If you want to go even cheaper, get a Rossi or Taurus, I have seen some sell for as little as $100 in decent used shape. They are not the equal of S&W or Ruger but they do work. She is not going to be able to tell the difference in accuacy between a Ruger and a Rossi anyway.
I would go with a used 3" barreled Ruger SP-101 in SS and load it with light .38s. The SP-101 has good grips that soak up almost all the recoil so she should be fine.
I would get something larger than a snubby if you could because it she is not going to be packing it so might as well dampen some recoil. I think a .38spl is the ticket. Maybe a nice used SP-101 or 3" SS K-frame would be the ticket. You can load it with light loads so recoil should not be an issue. I say SS because it is less likely to rust in the car.
If you want to go even cheaper, get a Rossi or Taurus, I have seen some sell for as little as $100 in decent used shape. They are not the equal of S&W or Ruger but they do work. She is not going to be able to tell the difference in accuacy between a Ruger and a Rossi anyway.
I would go with a used 3" barreled Ruger SP-101 in SS and load it with light .38s. The SP-101 has good grips that soak up almost all the recoil so she should be fine.