Rachael, Keep the conversation simple and to the point. Just tell him that you filed for a divorce based on the grounds that he's still involved w/the ow. You do not need to tell him what is in the divorce papers...that is his lawyer's job to explain it all to him.
If he is prone to violence or temper tantrums, have someone very close by, maybe in the next room just in case he goes off.
Once you have advised him that you have filed, walk away and do not engage in any additional conversations w/him. He will be angry and want to bait you...don't take the bait.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
