To cut to the chase, you felt something was going on and decided to INVESTIGATE what was currently keeping your spouse busy- discovering that he/she was having an affair for a couple of months already.
Now my question is, which would hurt more:
a) He/ She having an affair with a friend of yours (perhaps a family friend/ a relative of yours/ your best friend or worst a sister/brother) or;
b) He/She having an affair with a person he/she met in a bar or strip club that grew into a relationship of constant communication, tender affection and blazing passion.
A typical answer would be, DEFINITELY A- a classic case of betrayal. Why wouldn't your heart be broken upon knowing you were betrayed by two people who you loved and trusted? It's even more painful if the person you talked to about your problems and marriage failures was the one your partner had an affair with.
On the contrary (in a sick and twisted sense), B is a pride crusher. What dignity is left to learn of your spouse's desperation for temporary earthly satisfactions given by someone he/she used to compensate (need not be monetary at all. It could be a house, a deal, a promise of security, financial /personal aid or the poor man's bribe- I'm willing to leave my family to be with you.)?