May, not sure if you want me to chime in anymore. Mine doesn't seem to be a popular opinion
But I think you need to stay out of his business there with the denial. What do you imagine you can do about it?
Also, I would take what you established in MC and run with it (and just so you know, I wouldn't go to MC alone again - I think that has the potential to create some paranoia in H? Maybe? Not a biggie, but I wouldn't.)
But yeah, act like you're dealing with a scared animal. B/c you are. I wouldn't solicit. But I would make it very very comfortable for him. Body language, opennness, reflective listening.
I'm not sure how to do it if the subject isn't on the table. But if it gets brought up again - you'll be prepared.