Responses
It seems like I wasn't clear enough on my comment.
If the kid wants to stay with his mother there is little she can do "emotionally". If she takes custody of him but he wants to stay with his mom, no matter how many times he visits his mother its not the same as staying with her. Although the mother is very emotionally immature (I don't remember her name) it looks like she loves her son so if they are separated I'm afraid there might be some resentment lingering.
Take your nephew and leaveee, they can continue to do this to themselves. Also the prince is crazy for that apology letter, idek if it's possible to match his freak.