Boyfriend baby mama help!!!

Lori

My boyfriend's son and baby mama live in Arizona and she took off with him after they broke up. He is 3 and they currently dont have any court order for vistations in place. She has all control over him.... the last time he saw his son was in April and it was only for a couple hours. She was letting him talk to him on the phone and send him pictures and videos but that has all stopped since he told her about me and we are expecting twins and moving in together. They split up a couple years ago. She has cut off all contact with him now. He cant talk tp his son and she no longer sends him pictures, videos. He hasnt done anything accept move on with his life after trying to make it work with her. I have an 8 year old son from a previous marriage and she is going to regret doing this when he gets older and realizes. It almost makes me want to contact her and say something but I know I dont have that right but he is really hurting and I dont know what to do. He did nothing wrong and it seems she is jealous.