Thelly - It's useless if you refused to believe it's the truth. Now that you've admit that your marriage is not perfect that just put my point forward that it just a matter of finding your weakness and fall for it.

You are not a cheater. Well, right now you are not. I don't believe that you'll never be one though. But should you die today and your wife says you've never cheated, I'll believe it then.

Same goes with everyone else. You can deny and argue about it until you turn blue but it won't take the fact that anything can happen and you might end up cheating if you're not careful.