Affairs by definition are realtionships that occur while a person is already in a relationship.
I was going to be long winded here, but instead I'll try and get to the point.
They are running from something, and until they stop and face whatever they are running from they always will. To that end, until they do, any realtionship they are in will be in jeapoardy.
That's my belief, and I am not a professional.
Experience is a brutal teacher, but you learn. My God, do you learn. - C.S. Lewis
Life is usually all about how you handle Plan B. - Jack3Beans
Listen without defending; Speak without offending - FaithinAK