Maybe validate and empathize and appreciate his apology... and that's it? (I.e. don't enter a R discussion, don't spew or say "this was your choice blah blah blah". Respond in a kind but detached way, I think. I'm not sure I would respond to "what to do" about D6 either. .. (he hasn't really asked you anyway).
And he hasn't said, "I am ready to work on our R".
Keep focusing on YOU and D6. Stay off the rollercoaster. She needs a stable parent--and right now that is YOU. Hang in there.
We are NC at the moment aside from an email I sent him yesterday including an update on the kids/work/finances etc so i'm not going to reply to him.
He's beginning to feel the reality of his choices & there is no way i'm going to cushion that for him, he can deal with the consequences of his actions! He needs to realise what life is like without me before he will find the strength to take action, i'm pretty sure he will eventually do whats needed although I have no idea where i'll be and whether i'll be interested by the time that happens!!
Thanks Claire
Divorce Final: Oct 2014
Your struggles today, develop strength for tomorrow...