NC, I think it funny sometimes we are so critical of ourselves here, when our WAS are the poorest role models ever. But, I do think that means we need to be even better role models as a consequence; more loving, more forgiving, etc.
I think there is nothing wrong if your S is talking non-stop about the OM changing the subject, and if he continues, then ask him directly to talk about something else. I do that, and I feel fine about that. You are entitled to setting boundaries with your children like that imo. The rest, instead of telling them about the right behavior in life, you need to show them with your actions. I think that's a core DB principle, right?
Hope you don't feel attacked. I think we all here do care about your and your S's so hope you understand the spirit at least. I'll try to post again, but if not, Merry Christmas to you and your S'!!!!!