Thank you very much everyone for your advice. Things have slightly changed and I had to step in. Got asked by someone today if my ex was married as his NGF has been posting photos of our children in her social media page.
She has only been with him for two months, and I don't know who has access to her profile so I asked him to avoid a third party (that aren't their uncles/aunties) to post pictures of our kids. By the way I don't do it myself as I work with kids and I know the risks of grooming. Funny enough he agreed but now I guess he is going to block all of our mutual friends. That is so funny.
KML I won't go to see a solicitor as he will see it as me being jealous which isn't the case. He will have to learn from his mistakes. I will only step in if I feel my kids are in any kind of danger. He has already lost his eldest daughter and if he carries on he will do the same with ours. My youngest (she is not 10 yet)came home saying that she doesn't want to see her dad as I quote: it's one GF after another and when she is with us he only cares and spends time with her not us.
It will sound harsh but I will let him hang himself with his own rope. He needs to learn from his mistakes. So far he hasn't.
Last edited by job; 07/02/1812:53 PM. Reason: edited a word for poster