Some people reeeeally respond emotionally do the cleanse. Your sister should just go with it and let all the tears out.
After she has just let it all out, all the sadness and distress...she may want to examine why she was crying...Or not. The fact that she is cleansing her emotions is excellent. She can release all those pent up, out-worn emotions that aren't doing her any good anymore. Time for them to go.
She is on the right track. She may be transformed after this cleanse. It's a positive experience even though it feels painful.
Make sure you both are drinking enough lemonade and warm water in between the lemonades...this will flush your system of toxins faster.
You may add the b&p's to your MC..it is never too late. You can continue with the b&p's after the fast is over too. It's a good idea to cleanse cleanse cleanse those intestines and toxins!
Hope she feels better!
*if she is inclined...she could write about why she was crying - even if she doesn't know...if she starts writing it'll all come out -whatever needs to.*