Wad cutters are going to be your only option. Back it up with this:
http://www.kimberamerica.com/shop/pr...25cdc4b2231062
Shoot like a gun, but shoots OC.
Now this being said, how healthy is she, respiratory system wise? If something happens, and she sprays the OC, or even regular pepper spray, and a fan or wind blows even a slight mist back at her, she may have some serious problems on her hands.
And lets refrain from using the term "let er RIP" in this thread. Seems counter productive.