H returned from his trip. Texted/called FIVE TIMES to change his plans on how/where/when he would pick kids up. In the end, went with the (almost) original plan.
When it was time for me to pick them up, H changed the plans again. Then at the very last minute, he invited me to join them to eat. I was hesitant to go, mostly because I don't want to get in this habit of barking when H says bark. But I hadn't eaten, my boys love when the four of us are together, and I figured it might be a good opportunity to be friendly with H. So I went. H chose a restaurant that we used to frequent, where the waitress knew us well. I arrived late (since H invited me when they were almost there already). Waitress was so happy to see me and the kids. Not sure if H has been going there all these years, but I have not. Called us Mr. & Mrs. like she always does. Weird, but then again not really... Commented on how kids had grown and how long it had been since we had been there. The last time we were there was just post bomb - H had told me how much money he was borrowing and when I freaked out over the amount, he told me "don't f-ing ask any more questions". So glad that that H isn't around anymore and glad that this last eating experience kind of erased the memories of the last time there.
I asked H about his trip and he was very open about it. Even said that he told kids he'd like to bring them there (even though I already brought them there last year...).
No mention of the D, or even when we should get together to discuss it. Just going to wait and see if he brings it up. If he doesn't, I think I'm ready to gently force the issue, so I'll ask him.