Hello I am a lawyer with over 15 years experience I will try to help you with this. I don't think any laws have been broken, certainly not any criminal laws. Is he the children's father? I take it there are no court orders of any sort in force regarding you and him and the children Have you asked him to take them down? How old are the children will they be able to ask him to take them down? Hvae you contcated face book yet. Doee your ex- partner know you dispprove? There is nothing inherently objectionable about the pictures themselves?
Hello again. I note you have not replied to my answer please do not hesitate to do so if you need further help.