It's good to remain friends with the in-laws, I have done so with mine. You did the right thing in asking your FIL (Father in law) to stop with the letters. I know your FIL will think he's helping but he's not really is he? Ask them to be there for you but also ask that they do not try to fight your case for you. As you know, your H will feel that is own family are against him & that frustration will more than likely be aimed at you. As for your H asking you to not talk with them is your buisness & your choice whether you do so or not. My choice would be to continue to see them as your family because thats what they are.