Is this cake eating? 15

[MrBond]

My thoughts are your XH is nuts. He probably felt humiliated and embarassed that his own son ripped him a new one. So he felt the need to blame you for it. The OW was probably feeding him too.

Talk to your son. Tell him you're proud of him for expressing himself and that you are there if he needs support. You can tell him that your H still loves him or else he wouldn't have been there, but tell him that the issues are between you and your XH and has nothing to do with your son.