cleansing the liver would help this woman to strengthen her immunity and to remove the herpes virus from her body. If you really care for her you might suggest this. I believe that most of us are walking around with the herpes virus, but only those with weakened immunity are "coming down with it". If she were to begin flushing the liver, it might make the herpes symptoms worse at first, but once the liver is clean she should become asymptomatic.
There is a great deal of info on cleansing on this site.