Here's a thought......You say "The Epsom Salts made her feel bad right after she drank it"....How is she going to feel if she has to have surgery? There will be a whole lot of other stuff she will go through that will be a whole lot worse than a few minutes of feeling badly right after drinking the Epsom Salts . Tell her to try drinking it with a straw. A few minutes of discomfort is worth it the next day when you see the "surgery" she performed on her own body.
Something else she might want to look into......Dr. Richard Schulze sells a liver/gallbladder tincture that she might be interested in......Call 1-800-herbdoc.
There are also other flushes she might look into....
The important thing is to remove those stones. 90% of ALL human beings have stones. Here is my all time favorite post from many years ago to explain the importance of Epsom Salts :