Social services assistance needed.

[Shootingstar]

I need a little guidance/advice please.
About four weeks ago my partner was arrested because he had been speaking to someone in a chat room on a porn site. The person he was talking to asked him his views on children and my partner decided this guy ‘needed catching and reporting’. My partner, thinking he’s some sort of superhero, has then fabricated a fantasy about some step daughters to try catch this guy out. But it’s now backfired and he’s been arrested. His bail was dropped after two weeks and he is still under police investigation but there are no charges. The police have scanned his phone and found nothing.

In the meantime the social have been and because they see him as a risk to my children, have interviewed myself and my two children - 13 and 10. They have spoken to their dad and the schools. All has come back as no issues (as it would) but they asked me to sign an agreement to say I wouldn’t leave my children unattended with him. I refused as I said the dynamics of our family would not work (work, classes, etc). My eldest arrives unannounced when she’s with her dad for the weekend etc. She has a door key etc and as my children have no idea why he is staying with granddad it would not work. I have since ended our relationship but we are still on speaking terms and he comes for his tea for the sake of the children but they are never left with him and he doesn’t stay here.

She has today emailed me (Wednesday 25 November) and told me she will be contacting their dad to tell him the reason my partner was arrested so my ex can appropriately safeguard his children after which she then informs me she is not available until after the weekend. She didn’t tell me what day to expect her to speak to him.

My partner and ex both work in the same industry and know mutual people. I am now concerned about the impact this will have on all of us, including my children finding out why he was arrested, as well as them losing their step dad of 8 years who in their eyes, has done nothing to them or us.

She hasn’t spoken to or met my partner yet but has contacted everyone else. Is this usual practise? She said she will have her assessment finished soon.

What can the assessment outcome be? If they basically say he’s a risk then can I ever salvage my relationship? What if I disagree. Can it be challenged? We have known each other for 25 years. We own a house together.
We are (or were) due to get married in 10 months time.

Thank you.