Name changed for this
So my ex is my 2 DC dad. He doesn't really get involved and when he doesn't have any effort with them. He has his own baby so I understand he can't always have them as he's a single dad. On Friday he fetched my Ds1 from school he hit him. So I said I'm reporting him as this is twice he has hit one of them and not to ask if he can have them. Also he isnt interested in DS2. He said it was a drunken mistake (me and him weren't together when he was conceived). I reported him to social services as I'm worried his baby is in danger. He then messaged me saying what did you do that for and that he's taking me to court so he can be main parent and he said he will win because he did It before (but his babies mother did drugs)
So the problem is my eldest has autism and yesterday he called DP dad. We both felt awkward because no one told him that he is his dad. And if my ex finds out he will say we told him. But we aren't bothered by him as we have a good chance at winning as we have the messages he has sent and he has sent abusive messages to my eldest before which I have took pictures of before blocking him on his phone.
But I'm not sure what to do as son is calling him dad as he's been a good father model to him and he is better than his real dad has ever been.
Does anyone have any advice? Or been in this situation