The problem has been and continues to be a lack of people willing to actually name names on the record or take a lie detector test. One of the women is a gossip open secret and has the initials of a frequent NBA all-star. I don't know the name of the other up and coming country star. I do know that both Blake and Miranda seem ok with all the cheating so maybe they have an open marriage. The thing is it is tough to have an open marriage if you are a public figure unless you come out publicly and say that you have one because every one just assumed you are cheating otherwise.
I don't know what you expect considering their history. It is not like either of them were faithful before.