I've done the Gerson Therapy before and the coffee enemas exacerbated my symptoms. Have you read The China Study by T. Colin Campbell? In a nutshell, animal foods are directly implicated in cancer. So is cooked food. All fat needs to be avoided.
The body heals. We need to give it the conditions to do so by removing the cause. She can still get great results without the enemas but has to remove all animal foods, salt, Sugar and fat out of her diet and REST.