I keep pondering this "talk" thing... it's interesting... Most spouses don't try this trick.. this is a new one...

My first instincts say its just damage control efforts on his part... But maybe there's more to it...

I think he MAY want an answer to his dilemna of who to choose. I think maybe he thinks "talking" with you will get him that answer.

Of course, we all know this dilemna is only in his head. The choices are obvious here - man up, or run away like an infant and hide...

I am thinking if he does try a "let's talk" I would take a firm stand at this point.

"Are you ready to start acting like a father and a husband and work on your marriage, or are you committed to destroying this home along with her? I've made my choice... YOU need to make one... And soon."

I think some position like above would be good to take. It is daring, but under the circumstances it may just be the best bullet to put in the chamber on this affair right now.