I knew someone quite well when she was in a very abusive relationship. We have had minimal but not zero contact for the last ten years since the relationship ended, partially through distance.
The relationship started when she was still with someone else- there was overlap, and he persuaded her that this allowed him to cheat on her and abuse her. He himself was also in a relationship at that time.
I know her ex much better and know that he only starts relationships with women who are already married/engaged/in serious relationships for the purpose of abusing them on this point.
She made a comment in a recent email about that time, but I want to say to her that his abuse was deliberate, and that this is his M.O. She was actually pretty blameless, she started a relationship in good faith. But he didn’t really.
Do you think I should mention it? Or continue to let he think she contributed to her own abuse.