I certainly have no objections to "using" him for room & board. He's had no reservations about using you as a baby sitter, and I'm sure H won't either when her baby comes. I'm going with "when" and not "if" on that one...
If they are.having a baby now, I am out. I have made that very clear and will stick to my guns on that one. I will not be their nanny and am.not a willing to.coparent their child any time.soon.