If you have her "finger pinching" the slide? Teach her to "palm" the slide it's a stronger grip and allows her to utilize the push pull force of action when she's racking.
PALM.. Grasp top of slide with weak hand, thumb is indexed toward her body; rack the slide push pistol forward while pulling slide back release.
'Steel cuts flesh / steel cuts bone / steel does not cut steel.'
Become steel or get cut.