Extra marital affairs

I also have two colleagues who are in an extra marital affair. Both are married with kids.They usually go out together, and coincidently will tender their vacation leave at the same time. People at the office was already starting to talk behind their back about their obvious actions. As a transparent person, I confronted them about the current gossip at the office. And you know what happen? They both got mad at me and say so many things like "they didn't expect me to be malicious person and that I am not a friend to them because I have accuse them of having an affair, that they are very disappointed..blah, blah, blah. I was shock and just laugh it out. You know why? because when they start accusing and saying words like that on me, it was the moment that I prove to myself that this two really had an affair. Funny? yes, it is funny. Just a piece of advise, just ignore them. It will make your life better :)