How will you handle the after?

For those of you who are in emotional long term affairs but do not plan on leaving SO, what is your plan for D-day if/when it comes?

Just curious if you have a plan. Has it crossed your mind how you would deal? Obviously if you were the one discovered, you’d have to do damage control and focus on your marriage, but how do you do that when your heart is with your AP, how do you endure the separation? How do you damage control when your heart is not it?