Parents are getting divorced; found out that both are cheating. What should I do?

I'm from the U.S, New England specifically. Last summer, things started to get 'tense' between my parents. It has cooled down a little bit for the past 3-4 months. Recently, however, I discovered that my Mom is cheating with someone, which includes going out of town to do so, and my Dad is constantly hiding the fact that he talks with women. I don't want to reveal it to either of them, just in case it will go down-hill very quickly.