Back story: four children, divorced for 7 years. Ex had every weekend contact from Friday night to Monday morning and summer/Christmas holidays.
Ex assaulted two of my DC last year. Older DC told me and I reported to police. After six months of police and social work involvement, ex was convicted of assaulting one DC as a plea bargain.
Social work said I was a protecting factor for children so they were not put on at risk register and it was voluntary whether we worked with them or not. DC all still wanted to see their father and social work agreed so gradually contact was reintroduced.
Two weeks ago, my youngest DC whom is autistic, came back from contact upset. Youngest dc told me they didn't want to see their father anymore. I asked why and youngest DC told me they had been upset and sat on the floor in shopping centre, refusing to move. Youngest DC is 7 and does this when they are overwhelmed and close to meltdown. Ex tried to get DC moving but when they wouldn't, he picked DC up off the ground by the wrists and put DC over his shoulder. DC states their wrists and arms were sore and it hurt being put over the fathers shoulder.
I text ex regarding this and stated that neither the school nor myself have never had to resort to physically forcing DC to do anything, that it just distresses DC more and it wasn't acceptable to to handle DC like that. That DC needed to build trust in ex after assault and I would take steps to protect DC if ex cannot get help in learning how to handle DC.
Ex did not reply or try to get in touch for two weeks. Then yesterday called and asked for contact. On asking why he had not responded to text he stated he hadn't been happy with the text. I repeated that DC had asked not to see ex and that it wasn't acceptable. Ex insisted it was fine, not illegal, tried to say he picked up DC by his hands, that it hadn't hurt, that I was using the children against him and everything was my fault because I called the police when he first assaulted two of my DC. Then hung up.
As he won't accept he can't treat DC that way and I can't be sure DC will be safe, I have a residency order which ex did not contest and have made the hard decision to stop contact. This will upset the DC as regardless of what their father does, they love him anyways. I hate to upset them but I also can't have them being scared and hurt. AIBU?