children have sufferd physically but he claims was an accident
This suggests that more than one of your children has suffered non-accidental injuries caused by your abusive twunt of an h.
Of course he's being nice; it's a ploy to convince you that you will both be hard done by if SS decide that they have no alternative but to remove your dc to a place of safety because you have chosen to continue putting him above the needs of your children.
I hope you can understand that, should this come to pass, you will have only yourself to blame because it would appear that, over a period of some considerable time, you have not been lackiing in support from various agencies to help you end your dependence on a violent man who cares only for himself and and give your dc the life that they, and you, deserve.
I have no doubt that you are more than capable of assuming sole responsibility for the welfare and welllbeing of your dc, and you may find that your 'anxiety' is greatly alleviated once you have co-operated with SS and taken the necessary steps to get this pathetic excuse for a man out of your lives once and for all.
Your h has caused you years of heartache and pain and he has inflicted untold misery on your dc; if you fail to need the writing on SS's wall, I very much fear that you and your dc will be doomed to endure considerably more needless and unnecessary suffering.
While it is freely available to you, you are best advised to take advantage of all the help you can get to ensure that you are able to become empowered and self-determinining.
No woman, child, or beast, should be living the way you are, honey.
Start the process of changing your life for the better now and don't look back.