Looking at things now, I would say I would like my W to have told me personally. It would be honest and it would have to be that the wayward spouse asks to be forgiven. I think that's the biggest thing. They would also have to explain why they did it in the first place.
But that's just me.
If they do decide to come clean however, they would have to be willing to take all the emotions that come from admission from their betrayed spouse. Anger, shame, depression, etc. as well as the risk of destroying their marriage.
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.