Ex partner grabbing DS in rage

[childmaintenanceserviceinquiry]

Looking for some measured advice. My ex's partner who was the ow, has always loathed me. We don't know each other at all. My ds disclosed to me that earlier this year she had pulled him really hard. There had been a family row when she was criticising me. He had gone to his room and she had followed him and pulled him out of his room. My ex did nothing. He told a friend who advised him to talk to his parents. He didn't. What advise should I give him if it happens again? If he tells me that's great for our relationship but the family court treat it as parents bickering.

Nobody has any advice?

How old is ds?

11 with Sen

I wouldn't let my DS near either of them. She is violent and he doesn't protect his son.
If your Ex has an issue, tough, until he can demonstrate that your son will be safe.

Poor boy.

The best thing that could happen would be if ds could tell a teacher.
They would be obliged to report it and you could not be accused of making it up.