I am popping in for a brief time. To borrow from one of Bet's gems, your H is a "dickwad."
Here's a suggested response to H:
"H, I don't appreciate you trying to put words into my mouth. This is between us and should be handled like adults. If you wish to discuss our separation with the children, we must come to an agreement on what we will say to them together in the same room. The reason for this is to avoid confusing them and what we will tell them needs to be age appropriate."
Isn't it your children who still think that H is coming back home in May, right? If so, then you need to make it clear to H that he needs to say this to the children himself! Keep your mouth zipped on this particular matter.
