Risk assessment now in question and social want a CiN plan

[Scaredand confused]

So things moved along. Judge agreed to carrying along with 50/50 and overnights with supervision and for social to do a proportionate assessment on how things are implemented. Social worker is newly qualified but seemed nice at first….
Spoke with the kids. Step daughter anxious because social worker kept asking her the same questions so she thought she was giving the wrong answers. Reassured no wrong answers just maybe she was giving different options to check understanding. She seemed happy. I shared this with social worker so she could be mindful when speaking with them next. Spoke to them at Mother’s house next. SD returned really upset- are we splitting up? Was used as example to “test” how they feel about unsupervised time with dad. I tried communicating with the social worker ahead of was avoidant and then when she did answer after I stressed the emotional harm her avoidance was doing she was utterly nasty and said the children do not feel safe alone with their father. We disagree entirely given they are the ones who have been asking to do things with him. She then accused us of coaching due to SD being anxious she had said the wrong things. I pointed out I don’t even know what the questions were and reassured her that she couldn’t do wrong. I’ve made a complaint and waiting for manager. The social worker wants to put us on a CiN plan but won’t give us any actual information other than she wants to assess the specialist risk assessment done by Lucy faithful and how it’s implemented (literally what she was meant to be doing now!) she is pushing me to agree and even though we only actually got this assessment document a couple of hours ago is pushing us to agree ahead of court to the plan (which she has not shown us) she is being incredibly difficult and every aspect is met with utter extremes despite 4 years of positive contact, the children constantly telling her I am their safe person and requesting to do certain activities unsupervised. Within the last month I had a medical emergency and was not able to drive. We agreed with the mother that the journeys to and from school could be unsupervised for this period and agreed safety protocols which I also discussed with Lucy faithful for support. I informed the social worker prior to this commencing but today on her visit she has suddenly jumped on this and said she wasn’t aware!! I even pointed out the in depth discussion we had about the plans and protocols and what I would do in her many what ifs scenarios.
I do not feel safe with this person she has a clear agenda and no intentions of supporting things forward. She is causing emotional harm to the children. Their mother is still in support and agreement. Please help me to make sure this is viewed and managed properly. 4 years with only positive contact, everything moved forward in agreement with the children and mother. We are not asking for significant changes just permission for occasional events and short journeys or trips to shops etc. all other periods would remain as they are. I feel the social worker has a distinct issue with us and does not want to help us move forward