It's funny that I was just thinking yesterday (while catching up on your last thread) that you should try LRT. What have you got to lose? If you're still in the same pattern of visiting the house every night, giving back rubs, etc, then I think you should stop and try something else.
Since you're still questioning whether to take WC to the Xmas dinner/party, I would suggest not doing it.
Good move talking to your S right away about his attitude. If you let him know that he can't talk to his mom that way, then hopefully you score on 2 fronts (with a better-disciplined s and a grateful w).
