I am close to my DSis who has a 16 YO DS who I am also close to. My DSis and her ExH don't get on at all. They divorced when DS was 6 yo following a serious DV altercation where DSis ended up needing stitches on her scalp. Anyway, throughout the years, exH has tried to get custody several times, not because he really wanted to, but to get back at my DSis. DSis never told DN exactly what happened, never spoke badly of her exH in front of DN, and never stopped DN seeing his dad as he was never physically abusive towards him.
A few months ago DN started asking a lot of questions, I think deep down he always suspected. Finally DSis told him what happened. As a result, DN has stopped seeing his dad, who is furious, blaming DSis for the abuse, lying, etc. While DN is trying to work through this, he has also developed this anger towards his mum for having him in the first place with a man she had doubts about from the word go.
DN and I are close and he talks to me which is good, but I am about to leave to spend a year in Namibia for work reasons, and I worry about his state of mind. His college have provided counselling but he hasn't wanted to be too open with them. His world has been turned upside down. It is going to take a long time for him to re-build some sort of a relationship with his father, and my DSis won't ever be obstructive to that. What I am worried about, is the way he feels angry and resentful towards his mother for having him with this man when she knew what he was like. I was wondering if there's any age appropriate resources I could provide that will help him work through this.