No, you should not believe he's winding things down.
Yes, you've laid out a good boundary, and he is respecting it.
Yes, I would bring it up in MC, but I only like bluffing with House money; I would ask the MC ahead of time, privately, what their position is on MCing while there is still a 3rd person in the marriage. Hopefully, this MC will support you in your efforts at FULL no-contact, and FULL transparency.
Who pays for your husband's internet access and cellphone?
What is your current financial situation (don't need details, but) are family's needs being met?
