If your husband is paying for the house that he and his son are staying in the child support is still there. But to lighten you more, you can ask for a child support lawyer and settle this thing with your husband.

You cannot please everyone, if your wife really wants to file a divorce, the best for you to do is accept the fact. Relationship is run and build with love of two people. Before your situation get worse I suggest you to ask a divorce lawyer.