LOL, I know right, I was killing her with the bad throws, but when I rolled them to her she knew to bring the other hand to the ball and glove lol, ...
Dry pitches are a good choice. You can also do arm circle isolation drills focused on speed. With the full motion, I tell my girls with this problem...
I've been coaching fastpitch softball and teaching windmill pitching for 11 years. I'm a contributor at fastpitchpower.com, an online training resource that addresses softball-specific strength training as well as pitching and skills instruction.