Don't feel bad for not being prepared for the D talk! Apparently my stbxh wasn't the only one who brought it up out of the blue.
OK just consult your L and see what s/he says.
I think you did a good job explaining to your S that his dad isn't leaving him, it is the same as it is now, and that he won't be your husband. I think it was put in very good kids' terms! And good for you for not getting into it any further. Please feel proud of yourself for not insulting his dad or telling him "your father is leaving US."
Your H is choosing to leave your FAMILY but not abandoning his son. That is how I have come to understand it.
(((Mystik))) FWIW I am shocked that he is saying he wants a D so soon.
me,34 exH,34 S,16 months S:3/31/09-left for OW started DBing 10/09 d final: sometime 10/10 current: http://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=2022856&page=1 met in 2004