If you know that the call was a game, what are you worried about? Unless you have been cheating, and it could be possibly true. When your wife confronts you just discuss it with her. As for her calls to the ex, I don't think that's a good idea. There is no reason for them to be constantly on the phone. Let her know that you are not comfortable with her being in constant communication with him. In a marriage the spouse comes 1st. If she really loves you, she will make adjustments, and not correspond with him.