Change in the last 8 months for me

So I haven’t been post on much anymore including Snapchat or instagram. I was in a (mental abusive) relationship for over 2 years. I was dumb and didn’t end it when i should have. He broke up with me accusing me of sleeping with my brother... for one gross. But I decided to focus on myself for a while. I just found the man of my dreams he is 21 handsome as hell and has 2 adorable kids. I’m 18 I know I’m not mature enough to have kids believe me I know I’m young. He is the sweetest guy in the world he loves my imperfections that my ex tried to force me to change. He hates when I wear makeup because “it takes away from my beauty.” I have not met his kids being his ex wife has custody of them and he can’t get them because honestly he dose not know where they are. I’m not one to get in the middle of things but he needs his kids I’m not one to judge but his ex wife is not a fit mother (in the words of her own parents). I’m not saying this to be rude but I was wondering if anyone knows what to do he has tried calling cps on her. His son is underweight and not getting the medical attention he’s needed. (He has a cleft palette) we are trying to figure out what to do dose anyone know anything we could do to try to get the babies back?