After a chat with a trusted friend, I've decided not to say anything to the kids today. I need to look at this now as a business deal, and I don't want to tip my hand. They of course would text/call H right away, and things could get ugly. I will wait to speak with my attorney before I do anything.
As you can see, I'm all over the place. But, I think I now have a plan, and it feels good.