If you don't want this D, do nothing to help it along. Nothing. Let him do what he wants, but don't help with it, don't file. Delaying it gives you more time. Think about things you would like to change about yourself, think back to the woman he fell in love with long ago. What happened to her? She is still in there somewhere. Be casual and friendly with him if and when he calls; no relationship talk, and if he starts talking about it, and you get uncomfortable, change the subject or tell him you have to go. My H said the same thing about him coming first, even not caring about our son.
Well, good luck on the interview, I hope you get it!! Enjoy your evening with your boys; I am sure they brighten your life.