I am sorry you find your self here, although it is a good place to be…
That being said, IMO, your children are too young to know and while H’s motivations for them not knowing is different, he still has the right idea.
Children have a “right” to know about our lives to the extent that we share with them. They are observant little creatures and are aware of much more than we sometimes realize but even with a direct question, there are just some things that they don’t need to know until the time is right. And even then, the actual details, you might not share with them.
Keep posting your story and questions, read the resources and the archives if you haven’t, and ask any questions you want to.
It sounds to me like you are on the right path.
"Acceptance doesn't mean resignation. It means understanding that something is what it is and there's got to be a way through it."--Michael J. Fox