No. There are several better answers.
1. Teach her to use a two handed grip. I think Isoscoles is the easiest and fastest to learn, takes only a minute, and to bring the handgun up to eye level. This is a very fast version of unconscious aiming, as her eyes can see where she is pointing the gun, even if she does not formally use the sights.
2. Put a laser on the handgun so she can see where she is pointing it without the sights.
3. Instead of telling her to empty the magazine, tell her to keep shooting as long as there is a threat. In most real situations, people keep shooting until their gun runs out of ammo without being told to. Sometimes, especially when the threat is immediately down or out of sight, people do not empty their firearm, but it is very common for them to do so.
4. If she is willing to take the time to actually listen to the above, it may help her without spending hours at the range. If you can, teach her to dry fire (especially helpful with a laser). It can do wonders for accuracy without firing a shot.
1. I’ve shown her the grip. She won’t pick it up. But she would use it if her life depended on it, I think.
2. I have a light on the gun, so that bullets hit the middle of the light +/- 2 inches. I’ll investigate a laser.
3. Got it. That’s probably an improvement. She might save ammo for additional use if the bad guy just ducks.
4. Right-o. Some day, we’re going to get her 75 year old mother out shooting, and I think we’ll get her on a .22 LR handgun. I think she’ll probably start there. Maybe.
Thanks!