Definitely boggles my mind too how people can continue doing this for years and years. My mom has narcissistic personality disorder (not diagnosed but only thing I can think of to explain her life and what she's done), and she has been operating like this her WHOLE life. I can't even begin to tell you how many lives and relationships she's destroyed and how low she's sunk in her actions - it's really revolting.
That was a side note. What I wanted to tell you is this - WS/WW never anticipate how this is going to come back to bite them. Years from now, when your son is older, he will have questions and he will know that his dad was a stand-up person with integrity. He will question his mother and she'll have to face the music. And she hasn't lost him now, but she may lose him in the future. This is what they don't think about or anticipate - the long term view of their actions.
I know this from first hand experience as I had to cut my mom out of my life once I knew all the truth and the damage she had done to me and everyone I loved.
So, it will come for her, but just not in your timeline.
