The exposure happens and confrontation is immediately after that... There is no hiding done at all...
The reason why I reccomend exposure first is because if you confront first then you give your spouse a WARNING and they may run a counter-exposure campaign on you, telling all of your family and friends that you are crazy, jealous, off your medication, etc
So, you expose first, and then the next day you confront your spouse directly... There's no hiding, its merely tactical