busting, I know it's difficult, but if he's talking about where he's been, just listen and acknowledge him when he's speaking. Now, if the ow comes, up you can politely change the subject because you don't want to hear about her.
I do think your h is slowly reconnecting and it's going to take some time for him to feel comfortable around you full time. He's still fragile and yes, he's going to talk about what he's done because he's at that point where he wants to be more open w/you.
Continue to be yourself and honesty is really the best policy.
Enjoy your time in Berlin.
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.