Affair with a married man and she has herpes should i warn him and his wife?

If shes had herpes for awhile now im not to worried about it. The medication shes on prevents outbreaks. I dont recommend the medication shes on cause i was not able to tell when i was getting outbreaks at all but even with that being said im not concerned with your friend at all. Im more worried about her picking up another std then to pass herpes onto the married dude. No do not say nothing to no one she will be fine.