There are moments! I know my family is deeply disappointed at my H's choices, and hearing my devastation has taken its toll on them. Have you tried explaining DB to them? I've explained it to my family, and even though they often get frustrated that I'm not putting my foot down to H more (seeing the kids, being a friend etc) they express themselves, then ask what DBing says about it. I'll tell them and they are dubious, but have faith due to the positive changes they see in me. I guess they don't believe in H, but they do believe in me.
Your family loves you... but it's human nature to want to know how the story ends. They want a resolution. And the path we are all on offers no shortcuts to a happy ending. The fact that they are so adamant for D shows that they love you - they suffer when you suffer. Maybe if they understand that you have a long-term goal in mind. That your changes have a good chance of inspiring changes in your H, then they'll lay off.
It's very understandable that they don't want you to be married to this version of your H. But if you offer the possibility of an improved H?
Kiss that little D for me. My son is 1 too, and it's a magical age.